COMMISSION INTERNATIONALE DE L'ÉCLAIRAGE INTERNATIONAL COMMISSION ON ILLUMINATION INTERNATIONALE BELEUCHTUNGSKOMMISSION Division 2 Physical Measurement of Light and Radiation

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TC2-17 Recommendation for integrated irradiance andspectral distribution of simulated solar radiation

Chair	Gene Zerlaut (USA)	AD: Johnson
Note	Former chair: D. Kockott (--2002)
Member	Mark Chomiczewski (US), Oscar Cordo (US), Mike DePietro (US), Steven Ellersick (US), Francois Christiaens (FR), Doug Grossman (US), Chris Gueymard (US), Warren Ketola (US), Jack Martin (US), Daryl Myers (US), Andreas Riedl (DE), Joe Robbins (US), Art Schoenlein (DE), Kurt Scott (US), Burkhard Severon (DE), Gene Zerlaut (US) - April 2006
TR	Revise and update CIE Publication No.20 (1972)
Documents	TC meeting report , January 23, 2007 in Ft. Lauderdale, Florida, jointly with ASTM G03.09 meeting. TC meeting report , June 28, 2006 in Toronto during ASTM committee.
Status- July 2007	TC2-17 met on 28 June 2006, in Toronto, Canada. It has been agreed that the TC's work will be based on SMARTS2 version 2.9.5. Two other salient results of the meeting are: [1] Relevant tables of CIE Publication #85 will be re-constituted using SMARTS2 ver2.9.5 and will initially include Tables 2, 4 and Column 2 of Table 8; [2] the Chair will appoint four initial task group leaders whose function will be to provide the TC with atmospheric and geometric input parameters for spectral energy distributions designed for their specific applications. The re-constituted Publication #85 spectra noted above will be made available before the next meeting, which is planned for the spring of 2007 in Europe. A major agenda item for the next meeting will be to establish criteria for breaking down the detailed spectral energy distributions into wavelength bands that are amenable to simulations - and to being measured. There was no further information available in Beijing about the meeting in spring 2007.
Status- June 2006	TC2-17 met on 28 June 2006, in Toronto, Canada. It has been agreed that the TC's work will be based on SMARTS2 version 2.9.5. Two other salient results of the meeting are: [1] Relevant tables of CIE Publication #85 will be re-constituted using SMARTS2 ver2.9.5 and will initially include Tables 2, 4 and Column 2 of Table 8; [2] the Chair will appoint four initial task group leaders whose function will be to provide the TC with atmospheric and geometric input parameters for spectral energy distributions designed for their specific applications. The re-constituted Publication #85 spectra noted above will be made available before the next meeting, which is planned for the spring of 2007 in Europe. A major agenda item for the next meeting will be to establish criteria for breaking down the detailed spectral energy distributions into wavelength bands that are amenable to simulations - and to being measured.
Status- May 05	There was a meeting of U.S. interests on January 25, 2005 in Ft. Lauderdale, FL. SMARTS2 solar radiation model (Guymard) is proposed. Rationale for replacing CIE 85 was prepared. Comparison of SMARTS2 and CIE 85 was done. The TCC proposes a meeting in Europe in fall 2005.
Status- June 04	no report was received this time.
Status- July 2003	Zerlaut has taken over the chairmanship after the former TCC retired.  Zerlaut made a short presentation on the status and plans for the TC.  His plans are as follows: Proposed Approach - Task I Re-compute Publication No. 85 on the basis of the SMARTS2 solar radiation code developed by Dr. Christian Gueymard. Re-compute using the atmospheric, geographical and geometric input parameters used to compute Publication No. 85. Re-issue Publication No. 85 under the rules established by CIE for such revisions Proposed Approach - Task II  Using the SMARTS2 radiation code, compute application-based reference spectra that the community of solar radiation and related technologies deem to be needed, or useful - e.g., building energy technologies for different climates (e.g., solar loading), daylighting technologies, fenestration energy considerations, UV radiometer calibrations using reference spectra. Proposed Approach - Task III Continue the task begun in Part II of Publication No. 85 to construct tables to guide efforts to simulate solar radiation for various applications: Completing Part II based on the SMARTS2 version of Publication No. 85, Initiate activities to construct tables as guides for simulation of solar radiation applications identified in Task II (For further details, PowerPoint presentation is available on the website.) Some discussion followed.  TCC is requested to update the TC membership list. It was reported that Kok (South Africa) passed away.
March 03	New chairman, Gene Zerlaut (USA), is assigned.
Status- Aug. 02	TCC is retired and is not continuing this TC. He is contacting an expert in the field who is expected to take over the chairmanship. DD suggested that we allow a little more time and contact him again to obtain the new chairman's name.

Archive

TC2-19 Measurement of the Spectral Coefficient of Retroreflection

Chair	N. Johnson (USA)	AD: Johnson
Member	Arens (USA), Brekke (Norway), Fisher (USA), Hsia (USA), Hubert (France), Kurioka (Japan), Price (Great Britain), Rendu (France), Rennilson (USA), Richey (Germany), Schreiber (Germany), Sugiyama (Japan), Terstiege (Germany), Vandermeersch (Belgium)
TR	Identify the critical measurement parameters, tolerances, and requirements for, and conduct an international intercomparison of, the spectral coefficient of retroreflection.
July 2007	The final preparation of the draft is now completed and will be sent to the editor soon.
June 2006	The completion of this committee work has taken longer than anticipated, and TCC is still working on the final report. The technical work has been completed and results have been circulated informally to the TC for some time. TCC intends to get the final draft to Editor and complete the TC's work by the end of this quadrennial.
Status- May 2005	The TC report is on the intercomparison of spectral coefficient of retroreflection. The report is mostly finished. The last annex on radiometers is to be added and will be ready to send to the Editor.
Status- June 2004	The draft is nearly ready for TC ballot. The main output from the measurements is chromaticity. Several specification standards specify chromaticity limits and these mean that some revisions are needed to the report to take account of these limits and the associated measurement uncertainties. There is a strong link with D4 on surface colours for signalling and it had been anticipated that limits would be added to the relevant documents for retroreflective surfaces &endash; this will be followed up at the D4 meeting in September.
Status- July 2003	The final preparation of the document has been delayed due to questions regarding how to present the final data regarding anonymous contributors.  He discussed with J. Moore in April and now agreed on the final document, which should be distributed for TC ballot shortly.
Status- Aug. 02	The intercomparison is complete and the report now needs only final editing. The report will be sent to Editor Moore and is expected to be sent for TC ballot shortly.
Status- May 01	The intercomparison is complete and the report will need only final editing. The report will be sent to Editor Moore and is expected to be published in CIE Collection.

Archive

TC2-23 Photometry of Street-Lighting Luminaires

Chair	G. Vandermeersch (Belgium)	AD: Vandermeersch
Member	Ian Lewin (USA), A. Blochouse (Belgium),A. Corrons (Spain), L. Bedocs(UK), A. Por (France), C. Stratford (UK), R. Rattunde (Germany), G. Rossi (Italy), D. Gibs (UK), A. Ottoson (Sweden) - rev. 2003
TR	Prepare a technical report on the photometry of street lighting luminaires.
July 2007	No progress was reported.
Status- June 2006	The TC has not met since Leon, but TCC is organizing a meeting in September. The intention of the TC is to prepare a short addendum document to CIE 121, which will be numbered CIE 121-Part 2-2 and will definitively replace the old publication CIE 27. This will cover photometric data to be measured (on the basis of D4 work), photometric methods, uncertainties and tolerances. The following specific items to be dealt with were identified at the San Diego TC meeting: transformation of photometric intensity tables measured according old CIE 30-2; minimum measurement steps to guarantee accuracy in intensity interpolations for lighting calculations; clear conventions to fix the mechanical axes of the luminaire against the coordinate system; solve contradictions between CIE 140 and CIE 121 regarding the first axis of a luminaire; measurement of critical intensities for TI calculations (angles above 70°; measurements of critical intensities and upward flux for glare classification; specific problems linked to the technology of new light source lamps (correct positioning, warm-up time, stabilization, etc). There has been no major progress on these work items since the San Diego meeting, except for the last but important item.
Status- May 2005	The TC had a preparatory meeting in Leon. The task is to prepare technical report on specific requirements for goniophotometry of street light luminaries and has an addendum to CIE 121. The TCC, with TC secretary Blochhouse, went through CIE 121 and determined only two sections that need to be amended, and prepared two pages of addendum to CIE 121. It addresses the problems in mounting position (tilt) of the luminairs and the presentation of test results to follow the format in CIE 140 and other formats used in the U.S. Second task is to correct problems encountered in photometry of TL5 lamps - specifically the correction of difference in lumen ratio when using reference ballast and commercial ballasts. The work on this is being handled by an informal group of three manufacturers and two laboratories in Europe, in which Laborerec is participating.
Status- June 2004	He plans both TC2-23 and 2-52 meetings in September in Brussels or France. TC2-23 has not met yet, but the TCC nominated a secretary Miss Blochouse from Shreder Company. A first draft is being prepared for the September meeting. These two committees will also meet in Spain next year. TC2-52 should then be disbanded. The reportership (R2-30) on TL-5 lamps ended in San Diego. Since then the TCC had a meeting with interested people and, as decided in San Diego, new recommendations will be included in an amendment of publication 121. The work will be done within TC2-23.
Status- July 2003	The TC met on 30 June in San Diego, with majority of the members being present.  The following items were identified to progress the work: - transformation of photometric intensity tables measured according old CIE 30-2 - minimum measurement steps to guarantee accuracy - clear conventions to fix the mechanical axes of the luminaire against the coordinate system - to solve contradictions between CIE 140 and CIE 121 regarding the first axis of a luminaire (linked to the luminaire in CIE121 while vertical in CIE140 - even if CIE 140 mention the definition is taken over from CIE 121) - measurement of critical intensities for TI calculations (angles above 70°) - measurements of critical intensities and uwpward flux for glare classification. - specific problems linked to the technology of new lamps (correct positioning, warm-up time, stabilisation, etc). Ian Lewin provided information on the existing IESNA code on this matter. The TCC and secretary will prepare a first tentative draft for the end of the year. <Note> During the discussion in R2-30 report, D2 decided that TC2-23 will prepare an update of chapter 5 (Preparation lamps, ballasts and luminaires for tests) of CIE 121, dealing with measurement of TL5 lamps - the last item identified in TC2-23 meeting. TC2-52 is also working on addendum to CIE 121. The final form of publication of these addenda and numbering of the documents will be coordinated
Status- Aug. 02	The scheduled TC meeting in Veszprem was cancelled due to lack of members, but instead an ad-hoc meeting has been arranged for the afternoon of Aug. 27, in conjunction with the meeting of 2-52. The document is to provide industrial laboratories with the information they need in order to carry out the photometric measurements of street-lighting luminaires required in documents published by D4. CIE 140 already addresses many issues related to measurement. TCC needs an exchange of ideas with TC members about what to add on street-lighting luminaires.

Archive

TC2-28 Methods of characterizing spectrophotometers

Chair	Teresa Goodman (UK)	AD: Johnson
Note	Former Chair: John Verrill (-1999), 2nd chair: Peter Clarke (2000-2004), Mike Pointer (2004-2006)
Member	Andor (Hungary), Bastie (France), Berns (USA), Distl (Germany), Eckerle (USA), Konstantinova (Bulgaria), McCamy (USA), Robertson (Canada), Shinji Shimizu (Japan), Ulyanov (Russia), Zwinkels (Canada) -rev. 2008.1
TR	Write a CIE report on the characterization of spectrophotometers by means of reference materials and other methods, with particular reference to linearity, wavelength error, stray light, and integrating sphere errors.
Status- July 2007	There were some problems to find the last draft. The work on the revision of the found last draft will follow soon. It was pointed out that the consideration of uncertainties has to be revised. Alan Robertson mentioned that he did this work before GUM. Most other things seemed to be still current.
Status- June 2006	The latest draft is Draft 6. Since taking over the Chairmanship of this TC from Peter Clarke in 2004, TCC has been working on the draft of the technical report. His understanding was that the report was near to completion and merely needed review and editing before committee ballot. TCC circulated Draft 5 and received a response from only one member out of 9 members. But it is clear from the comments that the report needs further work of a technical nature (mainly uncertainty issues) for which TCC does not have the technical expertise to complete. Since Pointer was retiring and to resign the chairmanship, Goodman proposed that she would take over this TC for a short time to finish this document. The change was approved by D2 unanimously. Carter suggested that TC members should be updated. The latest draft has not been sent to all TC members, nor the Editor, and this should be done.
Status- May 2005	The former TCC, Peter Clarke left NPL last year and Mike Pointer took over the chairmanship. Draft 5 was completed and sent to the TC. Some comments were received and they have been mostly incorporated. There are only one or two issues in the uncertainty section and some terminology updates. It is expected that the report may be sent for final TC ballot this year.
Status Oct. 04	TC chair resigned. DD appointed Mike Pointer as the new chair.
Status- July 2003	The TCC hopes to have next version of the report ready very shortly.  He has put in all the extra pieces needed to complete the document prepared by John Verrill. The final version will be ready by the end of this month and will be send for TC ballot and hopefully to Division ballot by the end of the year.
Status- Aug. 02	The draft is close to completion (as done by former chairman J Verrill), and it is mainly editorial issues that now need to be sorted out.
Status- May 01	The draft was close to completion by former chairman J Verrill when P. Clarke took over the TC. There is small amount of work to complete the document, and the TCC is working with high priority to finish the draft to a final form in next few months.
Status Apr.00	Peter Clarke took over the chairmanship. The third draft was recently distributed, and comments received from the members. The TCC is working on the fourth draft and hopes to circulate it later this year for TC vote and to finish the document by next D2 meeting. The contents of the report was presented at the D1/D2 Joint meeting.

Archive

TC2-29 Measurement of Detector Linearity

Chair	Tom Larason (USA)	AD: Sauter
	Former chair: T. Goodman (--2002)
Member	J. Bastie (France), J. Clare (New Zealand), R. Distl (Germany), G. Eppeldauer (USA), T. Goodman (UK), P. Webb (USA), J. Palmer (US), G. Sauter (Germany), G. Andor (Hungary), A. Bittar (New Zealand), W. Budde (Canada), G. Dezsi (Hungary), Mihailov (Russia) - Sep 2003 (being updated)
TR	Prepare a CIE guide on methods for the characterization of the linearity of detectors of optical radiation, including different principles by which the linearity of detectors can be determined and causes of non-linear behavior, to aid users of optical radiation detectors in the selection and use suitable devices for specific applications.
E-mail reflector	Address / Message archive (password protected)	Subcriber list (password protected)
Draft Report	For TC members only (password required) Measurement of Detector Linearity (4th Draft May 2006)
Open documents	Minutes of TC2-29 meeting, June 30, 2003 (preliminary) "Linearity Notes for CIE TC2-29" from Jim Palmer, July 2003 (PDF file) Paper: Paul H.Wendland "Characterizing a laser receiver" (PDF 200 KB)
Status- July 2007	The last TC meeting was in Brauschweing in 2006. Draft 4 was discussed then and several comments received. TCC was to review the proposed ILV terms related to detectors and linear detector. No further activities reported.
Status- June 2006	TC met on June 15 in Braunschweig, attended by 47 people, including 7 members. Draft 4 (2006-5) was circulated to the committee before the meeting, and was discussed at the meeting. Most of the discussion centered on the TR and definitions. In particular, there was lengthy debate on whether to strictly follow the TR and TC title and limit the document to detectors only (e.g., photodiodes) or to use the term "detector" in a broader sense and include amplifiers and possibly displays. The later, broader used of the word "detector" seems to be in line with the intent of the TR since the document is a report for the general user as a "guide" and "aid", and not a standard. This led to a discussion of proposed ILV terms for "detector" and "linear detector" and whether these terms should be used in the report or whether new terms should be defined. The meeting agreed TCC should review the proposed ILV terms for "detector" and "linear detector" and suggest to the TC whether these new terms should be used and if the TR should be modified. 8 people requested to join the TC, which will be followed up using the new membership guidelines.
Status- May 2005	Work is delayed due to the TCC's work schedule. The TCC plans to make the changes agreed upon at the San Diego meeting and receive comments from the committee members by October 2005. If sufficient progress is made after receiving the comments by then, a meeting may be planned at a time and location suitable (e.g., CIE D2 Meeting at PTB in June 2006).
Status- June 2004	There has been little progress on the next draft due to the TCC's work schedule. The current plan is for the TCC to distribute the changes agreed upon at the last meeting in San Diego this Fall and receive comments from the committee members by March. A second draft would be distributed before the Leon meeting in May 2005, where a committee meeting is planned.
Status- July 2003	Tom Larason took over the chairmanship. The TC had a meeting in San Diego on June 30 with 23 people attending (10 members, 13 guests).  This was the first meeting of reactivated committee after a few years of inactivity.  The TC membership is to be re-established starting with the members present.  The 3rd draft, which was handed over from the previous chair, was distributed and discussed.  There was a great deal of positive discussion of the draft and a keen interest was expressed in continuing the committee.  Several definitions need to be reworded, and other measurement methods to be added, such as DSR and beam conjoiner. The current draft will be totally rewritten in a new structure and format, with more parts to be added.  Email reflector will be set up for further discussion and draft 3 will be posted on the website in the next several weeks.  The TCC plans to have 4th draft in Jan. 2004.
Status- Aug. 02	The draft is at a fairly advanced stage but needs some more work to complete. Last year the TCC called for a volunteer for a new chairperson. Several people were interested. Based on their experiences and knowledge of the subject of the TC, the TCC recommends Tom Larason of NIST to take over the chairmanship. This proposal was voted and agreed with no objections. The other people who volunteered are asked to help the TC activity as TC members.

Archive

TC2-32 Measuring Retroreflectance of Wet Horizontal Road Markings

Chair	N. Hodson (USA)	AD: Johnson
Member	Austin (USA), Davies (USA), Dibbern (Germany), Hubert (France), Johnson (USA), Lundkvistl (Sweden), Meydan (Australia), Meseberg (Germany), Rennilson (USA), Schmidt-Clausen (Germany), Schnell (USA), Schreuder (Netherlands), Soardo (Italy), Sorenson (Denmark) - revised August, 1999
TR	To prepare a guide for the methods of measuring coefficient of retroreflected luminance (specific luminance) of horizontal road markings under wet weather conditions.
Draft Report	<TC members only - Password required>
March 2008	TCC, Neil Hodson, completed his 6th Draft and sent it to D2D, and resigned the chair.  It seems the document is ready for TC ballot. The document was sent to Editor to edit the format and structure of the document.  We need a new TC chair to complete the document.
Status- July 2007	The TCC, N. Hodson, have been retired. There is a draft on the website, but it is not clear, whether the chair may proceed or not. If the chair will not be able to continue, AD has to look for a new chair. R. Austin volunteered to go through the document to help to review the current state of the draft. But he remarked that methods currently in discussion do not work very well and that there have to be some investigations on test methods for that.
June 2006	Hodson stated in a recent email that he retired from 3M last fall but would continue chairmanship of this TC to finish the TC work. The document is close to completion and TCC will send it to Editor soon.
Status- May 2005	The TC draft is close to completion. One section of technical document remains to be finalized. Once this section is finished the document will be sent to the editor and for TC ballot.
Status June 2004	Additional discussion will be needed on how to include raised pavement markings in the next draft. The TCC plans to have a meeting with D4 in September.
Status- July 2003	The TC had a meeting on June 30 in San Diego with 5 members and 7 guests present.  There is one section remaining to be further reviewed before they can proceed. The TC will continue to discuss the draft changes by email.  Next meeting will be planned for either next D2 or D4 meeting, depending on availability of the TC members.
Status- Aug. 02	The TC met last September in Istanbul, and subsequnelty prepared the third draft document.  The TC document is closely related to D4. TCC plans to have another TC meeting in conjunction with the next D4 meeting in Torino, Italy.
Status- May 01	The TC met last fall in Toronto in conjunction with D4 meeting. There is a draft document in progress. The TC is working in close contact with D4 in lighting for transportation and traffic. The TC plans to meet in Budapest with D4.

Archive

TC2-37 Photometry Using Detectors as Transfer Standards

Chair	Y. Ohno (USA)	AD: Sauter
Member	Andor (Hungary), Austin (USA), Bastie (France), Bittar (New Zealand), Czibula (Germany), Corrons (Spain), Dézsi (Hungary), Eppeldauer(USA), Gardner (Australia), Goodman (U.K.), Kohler (BIPM), Moore (UK), Muray(USA), Pietrzykowski (Poland), Rattunde (Germany), Rastello(Italy), Sauter (Germany), Schanda (Hungary), Wychorski (USA)
TR	To prepare a report on the properties of V(l)-corrected detectors that are suitable for disseminating and maintaining photometric units. This report will include methods for the use of these detectors.
Draft Report	<Members only - password requred>
Feb. 2008	The 10th draft has been completed and was sent for the 2nd TC ballot with deadline 2008-4-30.
July 2007	Draft 8 has been prepared for 2nd TC ballot, and has been sent to Editor.
Status- June 2006	The TC document went through TC ballot (draft 7) in 2004 with no negative votes but several comments, some of which were inconsistent and need to be resolved. TCC is working on these comments and will send a revised draft to the Editor shortly and then send out to TC members again, for a second TC ballot.
Status- May 2005	TC ballot for the draft 7 in June 2004 and several comments (mostly editorial) were received. There were no negative votes. The TCC will finish another revised draft to make these minor changes and to send out the document once again for check by TC members, and to prepare the final version for Division ballot.
Status- June 2004	The TCC completed the 7th draft in the CIE report format, sent it to the Editor for checking the format and editing, and distributed to TC members for TC ballot, just before this meeting. The TC members listed in the document have been reduced to 15, removing those who did not contribute. If no new issues are raised from the ballot, the TCC hopes to have the TC report approved by Division ballot by the end of 2004.
Status- July 2003	The work is close to completion. Last draft version had only a few minor comments.  The TCC prepared the 7th draft for TC ballot and tried to send it to Editor before sending out.  The Editor, however, suggested that this should be done by the new Editor, since the work may continue after San Diego meeting.  The TCC will send the 7th draft to the new Editor after this meeting and then for TC ballot, hopefully before the end of 2003.
Status- Aug. 02	The sixth draft was distributed in April 2001 by email, and only a few minor comments were received. The next draft is for TC ballot, and needs only minor changes and updates to some figures and the format of document. The TC ballot is to be distributed by the San Diego meeting.
Status- May 01	TCC rewrote many sections of the draft with the latest information available, and produced the 6th draft, which was distributed to the members in April 2001 and comments being requested by June 15. The draft is also on the website. Some changes were made on terminology to resolve comments made before, and more detailed information added to the determination of reference plane in the Annex. The next draft is hopefully to be sent for TC ballot later this year.

Archive

TC2-40 Characterizing the Performance of
Illuminance and Luminance Meters

Chair	Peter Blattner	AD: Sauter
Member	Austin (USA), Bastie (France), Peter Blattner (Switzerland), Czibula (Germany), Dezsi (Hungary), Goodman (UK), Khandelwal (India), Khanh (Germany), Mahidharia (India), Ohno (USA), Pietrzykowski (Poland), Reiner Rattunde (Germany -deceased), Saito (Japan), Sauter (Germany), Stolyarevskaya (Russia), Vandermeersch (Belgium), Webb (USA), Xu (Singapore) - Rev. May 2007.
TR	Convert the present CIE Technical Report No. 69 into an ISO/IEC standard. Prepare a combined CIE/ISO standard describing the definitions of quantities influencing the performance of illuminance and luminance meters, as well as defining measurement procedures for the individual error quantities.
Draft Report	Members only (password requred) TC document 5th Draft 2006-06-29 (doc file)  (pdf file) TC document 4th Draft, May 2006) - PDF file Chairman letter May 2, 2006
July 2007	Peter Blattner (Switzerland) agreed to take over the chairmanship, which was approved unanimously by D2. An email reflector for the TC has been created. The TC met in Beijing and report given by Blattner. The meeting was attended by about 50 participants including about 10 TC members. Prior to the meeting in June, the TCC distributed Draft 7 with two new sections and several proposals for further changes. Several points on further changes for the draft were discussed at the meeting. The main concern was on class L photometers and uncertainty of f1‚Äô value. The TCC proposed to form a task group to do some practical measurements of class L photometers and to report the experiences back to the TC. First results should be available during the next six months. The TC plans next physical meeting in Turin 2008.  The minutes of the TC meeting are available for further details.
2007	The TCC, Reiner Rattunde, passed away in Nov. 2006. Peter Blattner (Switzerland), who has been active in the TC as well as CEN WG7, agreed to take over the chairmanship of this TC, subject to confirmation by D2 and the Board at the Beijing meeting. An email reflector for the TC has been created.
Status- June 2006	A fourth draft was prepared and distributed to the members on May 4, 2006. It had already been edited by the Editor. The TC met on June 14 2006 with about 80 participants, with 7 official members (out of 16) present. Draft 4 was presented and discussed. The general contents of the report were agreed. Further actions on technical contents, formal structure as standard and time schedule for completion were discussed. TC agreed to change the term "characteristic" to "index" and the term V(ª) match" into "V(ª) mismatch". The draft will be converted into the CIE format for standards using the proper template by the Editor. Email reflector will be setup to discuss final technical details for the draft. The chapter of uncertainties will be left for discussion after receiving the guidelines from DD. A final draft for TC ballot should be ready at the end of this year so that the standard could be finished at the 2007 Beijing meeting. Several new people requested to join the TC, which will be followed up per guidance from DD.
Status- May 2005	No report received. There has been no progress of the TC since Warsaw. It was suggested that, if no progess is made in a given time, a new chairperson may be looked for or the TC might be closed.
Status- June 2004	TCC regrets the little progress made for the past few years due to his other workload. The TCC plans to finish the next draft version and distribute it in two months and have discussion on e-mail reflector. The TC lost a few members and membership list is to be revised. New members are invited.
Status- July 2003	TCC regrets the slow progress of this TC recently, as he had very little time to work on this. TCC is working on the next draft version, but not completed by this meeting.  The TCC plans to finish it and distribute the new draft in a few weeks after this meeting and to have discussion via e-mail correspondence.
Status- Aug. 02	No report made.
Status- May 01	There has not been much progress since Warsaw meeting due to recent workload of the TCC. He is working on the next draft version and plans to use e-mail reflector to discuss the next draft on-line before next physical meeting.
Status- Apr.00	No report made.

Archive

TC2-43 Determination of measurement uncertainties in photometry.

Chair	G. Sauter (Germany)	AD: Sauter
Member	J. Bastie (France), A. Corrons (Spain), R. Daubach (USA), D. Ellis (USA), A.Gaertner (Canada), T. Goodman (UK), J. Moore (UK), Y Ohno (USA), W. Steudtner (Germany)
TR	To prepare a CIE recommendation as basis for the determination of measurement uncertainties valid for quantities used in photometry.
Draft Report	Members only (password requred) Draft 8 2007-05-24 (doc file - 9 MB)  The following files are associated with Draft 8. Examples EXCEL sheet: TC2-43E8a.xls (2 MB) Mathematica-notebook "UncBud-TC2-43M8a.nb (these examples solved in an analytical and a Monte Carlo solution) Mathematica package "CIEGUM.m", which has to be copied in the directory "Applications" of Mathematica Mathematica notebook "CIEGUM.nb" is also included for those, who like to modify the existing package.
July 2007	Draft 8 of TC2-43 was posted on the website. The draft includes the main part and the annexes A and B but missing C. Annex C will be send out by the end of the year. On the webpage is also an Excel table "TC2-43E8a.xls" which can be used and optimized by the members. Additionally there is a "Mathematica"-notebook "UncBud_TC2-43M8a.nb" with the identical examples as in the Excel tables. To run the notebook, one has first to add the new created Mathematica package"CIEGUM.m" in the directory "Applications" of Mathematica. The TCC likes to have the recommendation of TC2-43 as an open document, to which additional annexes can be added if required. J. Schanda suggested to publish the recommendation and the annexes separately.
June 2006	A revised draft was prepared following on from the discussions at the last meeting, and this was used as the basis for Tutorial part of the Symposium just held. The TC document is divided into 3 parts: the first part covers fundamentals (main document), the second part (Annex A) is 15 modules from which more complex uncertainty budgets can be developed, and the third part is examples for modules with Mathematica programs, which are being converted to EXCEL. The document explains that the GUM is good for linear models, but not sufficient in some cases like f1'. There is a reference to the Monte Carlo method which is being incorporated into a supplement to the GUM (to be published). The final report should be ready for TC ballot by August.
Status- May 2005	The document is ready except on the question of weighted fits of distribution temperature, for which he was waiting for conclusion from the reportership (Robertson) created at Tokyo meeting. After having this resolved, the document will be ready to send to the Editor and for TC ballot.
Status- June 2004	The TC had a meeting in Tokyo on 9 June with many participants. The draft is basically completed, although format of the worked examples and possible calculation templates are still to be finalized. During the TC meeting the TCC proposed that uncertainties of the spectral values should be considered in the calculation of distribution temperature. Ohno raised a concern that this would be a change of the definition given in CIE 114/4, and that, if this change was recommended, it would be possible to obtain two different answers from the same spectral data, with and without weight. After a lengthy discussion, TC agreed on the chairman's proposal to use the weight by uncertainty. This issue was discussed again at Div. 2 meeting, on a problem Ohno noticed, and a reportership has been establilshed to investigate the problem. (See 2004 D2 meeting minutes.)
Status- July 2003	The TC had a meeting in San Diego on 1 July with many participants. The main part of the document was reviewed and was accepted in the current form. The second part of the document has several examples of uncertainty budget in practical measurements.  The TC discussed a possibility of adding more examples, including those for color quantities, to be published in two or thee parts, in the form of CD ROM, including EXCEL sheets.   The main part is basically ready for publication. The TCC will have the document checked by Maurice Cox (UK) and a PTB statistician for all the equations and consistency with GUM.  The TCC plans to have the final version ready for TC ballot by the end of the year.
Status- Aug. 02	No report made.
Status- May 01	The TC met on May 18 at NIST prior to this Division meeting. The document has two main parts. The first part on the fundamentals of uncertainty evaluation is now complete except editing. The second part is for examples. The TCC hopes to add more examples in the second part, and is requesting more inputs on practical applications. The document is planned for completion in one year for TC ballot.

Archive

TC2-44 Vocabulary Matters

Chair	Jim Gardner (Australia)	AD: Johnson
Member	Being reconstructed.
TR	To provide liaison between Div.2 and TC 7-06 "Lighting Terminology" and support the preparation of the new edition of the Lighting Vocabulary in the field of light and colour measurements.
Draft Report
July 2007	ILV (International Lighting Dictionary) is being fianlized by CIE BA. Regarding membership list: Any members of D2 should be able to raise questions on terminology through the D2 discussion list. If new or revised terms are suggested, those contributing to the discussion become the committee members for that item. The result of such a discussion, and also terms derived from TC reports, would then be reviewed as part of the formal approval when a new version of the ILV is being prepared.
Status- June 2006	Preparation of publication of new ILV version is in progress by CIE CB and VP Jean Bastie. This TC should continue to organize new terms coming out. It was noted that the membership list is outdated. Editor feels that the whole division should be involved rather than members, and will propose a new membership scheme. Any new terms after the new ILV comes out will be collected from new TC documents published after the new ILV.
Status- May 2005	Several terms that had been under discussion within D2, and discussed at Tokyo meeting, were sent to the ILV committee as agreed by D2. A few items which generated further questions were held-over for further discussion, and deemed too-late to be resolved in time for the coming revision. Some inconsistencies in revised terms from the different Divisions were raised, and harmonization efforts took place by email discussions between Schanda, Editor, D2D, and Secretary. After this ILV revision, next revision will not be processed for some years. Editor proposes that this TC should continue but not with fixed members. He suggests that, new terms will be approved when new TC documents are approved by Division ballot, and that, when any issues or conflicts of terms are raised, a discussion is generated within the Division by e-mail, with all interested parties, and reporting the results to the TC 2-44 Chair (ie, Editor) for listing in submissions when next revision of the ILV takes place.
Status- June 2004	As the Editor changed, the chairperson of the TC also changed to J. Gardner. The draft of the proposed revised and new terms was voted on by the Division in June 2002. There were a number of comments from the ballot, but no actions had been taken before the new Editor took over. All relevant material, including the draft and the comments from the ballot, were subsequently retrieved from the CIE CB and Edito wrote proposed actions for all the comments. Several new terms for incorporation in the ILV were also proposed in the TC2-25 final draft (Zwinkels) that has been approved by Division ballot. From these materials and actions, Editor prepared the following four documents - Response to the comments from the ballot - Proposed changes from the current version of ILV:1987 - Proposed new terms to be added to the current ILV - TC2-25 approved terms. These documents were reviewed by Secretary and DD, then distributed by an e-mail circular on May 26, 2004 requesting that any objections to the changes be sent to the Editor by June 9. No objections or comments had been received. There were several terms that Editor indicated should be discussed at the meeting. These terms: 01-28 quantity of light, 04-73 gloss, 05-42 quantum detector, and <new terms> array detector, and polychromator were discussed. See 2004 Div.2 meeting minuts for the details. The membership list is outdated, and should be re-established.
Status- July 2003	This TC will be transferred to the new Editor.  There was an issue of the radiance definition, which was already discussed.  Also, as general information, the ILV committee decided that 1st of July next year will be the deadline for all the Divisions.  We already had Division ballot for D2, and Editor is incorporating some comments received.  There is an opportunity by that deadline to add new terms.  M. Pointer reported that D1 did not have TC for ILV (they only had a WG) before, but at the D1 meeting this time, they established a new TC.  This TC, chaired by the new D1 Director, Sharon Mcfadden, should work very closely with D2. There is a TC in D8 on terminology, chaired by J. Schanda.  All these TCs should coordinate.
Status- Aug. 02	The Division 2 part of the Vocabulary (proposed changes) went through Division ballot in June 2002. One objection, which was also raised with the TC2-35 document (DS10.2e), was that the ILV definition of radiance and luminance may be incorrect. Another request was to define the CIE standard spectral luminous efficiency function in the ILV.

Archive

TC2-46 CIE/ISO standards on LED intensity measurements

Chair	John Scarangello (USA)	AD: Sauter
Member	Angerstein (Germany), Bando (Japan), Bouman (Netherlands), Bym (USA), Carr (USA), Distl (Germany), Ellis (USA), Goodman (UK), Heidel (Germany), Hwang (Taiwan), Jones (USA), Lester (USA), Moore (UK), Ohno (USA), Rastello (Italy), Sauter (Germany), Scarangello (USA), Schanda (Hungary), Schumacher (Germany)
TR	To prepare a CIE/ISO standard on the measurement of LED intensity measurements based on the CIE Pub. 127.
Email reflector	Addres / Message archive (password protected)	Subscriber list (password protected)
Draft Report	Members only (password requred) CIE/ISO Standard of Measuring the Intensity of Light Emitting Diodes (7th Draft, June 2006) June 2006 meeting material: points for discussion
Status- July 2007	The TC will be working via email on a new draft that will address several editorial, format, and technical issues that still remain. The first issue has to do with how to more clearly define the mechanical axis in a general way that covers the small multi-chip and multi-lens LEDs that we want to include in the scope of the standard.  The second issue has to do with the need to specify the LED conditions with respect to temperature and forward current since these have a big input on the measurement. On temperature, some members would like to specify a specific Tj or Ta and some would like to keep the standard more flexible since Tj is difficult to measure and a specific Ta would limit the use of the standard. The TCC will propose solutions on these issues. The third issue had to do with what to include in an uncertainty guideline section. Now that we have the Guideline for Uncertainty Sections, we will attempt to add a section with at least a table as suggested. The last issue is that the document should be put in the template for these standards.
Status- June 2006	The TC met in Braunschweig. The seventh draft was distributed and reviewed. In addition to several editorial and format comments, the meeting focused on several technical issues that still remain. The first issue has to do with how to more clearly define the mechanical axis in a general way that covers the small multi-chip and multi-lens LEDs that we want to include in the scope of the standard. The second issue has to do with the need to specify the LED conditions with respect to temperature and forward current since these have a big input on the measurement. On temperature, some members would like to specify a specific Tj or Ta and some would like to keep the standard more flexible since Tj is difficult to measure and a specific Ta would limit the use of the standard. More negotiation is needed on this issue. The third issue had to do with what to include in an uncertainty guideline section. Some ideas on this were discussed, in particular whether to include temperature in the uncertainty if it is not specified for the measurement. This discussion concluded with the input that we will get an uncertainty guideline to be used by all the TCs and we should wait for that. The last issue is that the document should be put in the template for these standards.
Status- May 2005	The TC met in Leon in May 2005 and reviewed the sixth draft document, specifically focusing on scope, definitions, specific tolerances, uncertainty calculation, and detector description sections. With respect to scope, we discussed including multiple chip or lens LEDs that are within the size limit scope. On definitions, it was decided to remove acceptance angles, allow mechanical axis and case temperature point to be defined by the LED vendors, consider a "spectral intensity" definition, and in general not include items like Tc or Tp, if they are defined elsewhere. On tolerances, it was tentatively decided that tolerances are not needed, because this is a measurement standard, and not an equipment standard. However, a section on uncertainty calculation should be added with help from committee members to write it. On detector descriptions, we decided to just drop the detector appendix since the standard is mainly a measurement definition and not a guide.
Status- June 04	No report this time.
Status- July 2003	The TC had a meeting in San Diego on July 1, 2003 with  32 participants.  Draft 5 was presented and discussed.  The TC discussed several major issues, such as dealing with tolerances, uncertainty calculation, test geometry variations, LED test conditions, and detector calibration. The TC agreed to have tolerances in the appendix.  Test geometry with mechanical axis only was agreed.  Uncertainty section is still to be written with input from members.  Discussed LED test conditions, current drive, andtemperature setting.  How to specify temperature for high power LEDs (with heat sink) was discussed but will need further work.  The TC also discussed generalizing the description of the detectors which can be used, including spectroradiometers. Terminologies and calibration issues are still to be resolved. Draft 6 will be prepared after more inputs from members are received, hopefully in the next few months.  (The materials presented at July 1 meeting (PDF file) are available)
Status- Aug. 02	No report made.
Status- May 01	The TC met on May 17 at NIST prior to this Division meeting. Draft 4 was distributed and discussed. The TC first discussed tolerances on geometric specifications, and agreed to put them in the Annex. For methods of calibration, the TC agreed to include the substitution method and the detector-based method, and to remove the method based on flux-based calibration. Some other changes have been agreed on LED test conditions (temperature) and LED alignment (mechanical axis). The section for uncertainty calculations to be completed. The TCC plans to go through a few more drafts to complete the work by San Diego meeting.

Archive

TC2-47 Characterization and Calibration Methods of UV Radiometers

Chair	Armin Sperling (Germany)	AD: Sauter
	Former chair: Gan Xu (Singapore) ( till 2004). Sperling since June 2006.
Member	Andor (Hungary), Boivin (Canada), Corrons (Spain), Coutin (France), Dezsi (Hungary), Eppeldauer (USA), Goodman (UK), Gugg-Helminger (Germany), Halbritter (Germany), Hengstberger (South Africa), Karha (Finnland), Kravetz (USA), Kohmoto (Japan), Larason (USA), Leecharoen (Thailand), McArthur (Canada), Ohno (USA), Pietrzykowski (Poland), Saunders (USA), Sauter (Germany), Sperfeld (Germany), Sperling (Germany), Takeshita (Japan), Thompson (USA), Webb (USA), Wilkinson (Australia), Xu (Singapore), Ye (China) - March 2008 rev.
TR	Prepare a CIE recommendation on methods of characterization and calibration of broad-band UV radiometers in the spectral ranges of UVA and UVB for industrial applications.
Draft Report	Members only (password requred) Methods of Characterization and Calibration of Broadband UV Radiometers (1st draft, Feb. 2001)
Status- July 2007	The TC met first time with the new TCC in Beijing after a long time of inactivity. The former TCC (Gan Xu) gave an overview on the past work and the structure of the existing draft. The new TCC explained proposed changes within the first chapters to make the document consistent with the ILV and the TC2-40 draft. The new draft will be send to all members within this year. The next meeting of the TC is planed in Turin, Italy, 2008.
Status- June 2006	The former chairman, Gan Xu, resigned in 2004 and the chairmanship has been open since then. The TC has a substantially completed draft and it was felt at previous D2 meetings that it is important to continue this TC. DD Goodman had contacted a few possible candidates, but had not been successful. Armin Sperling of PTB offered at the meeting to take over the chairmanship; D2 voted to approve this change of chairperson with no objections.
Status- May 2005	New TC chair not found yet. DD will try to approach some possible candidates. We have fairly complete draft and there will not be so much work to complete this committee.
Statis June 2004	The TCC resigned earlier this year due to changes in his work responsibility at his organization. He apologizes for his resignation but believes that the TC work is still very important for the UV community and hopes the TC work can be continued by a new chairman. He is willing to help transferring the TC work to whoever can take over. DD asked for a volunteer from the participants, but none was forthcoming. DD will try to find someone from NPL (UK) to continue this TC.
Status- July 2003	The TC had an informal meeting during NewRad2002 at Gaithersburg attended by about 19 people. The chair informed the meeting that as he had been assigned a new post by his organisation to work in dimensional & mechanical metrology areas and would be no longer directly involved in P&R work, he had difficulty to continue the work for TC2-47 and was considering resigning as the TC chair. As no one volunteered to replace him, he decided to continue as the TC chair for at least another year and try to finish the revised (2nd version) document. Now, the revision of the document is still on-going and is expected to be finished and circulated to members for comment by September.  The chair regrets that he could not hold the TC meeting in 2003 due to budgetary reasons and he also wishes to get more support from members of the TC.
Status- Aug. 02	There was an unscheduled TC meeting during NEWRAD 2002 at NIST, Gaithersburg, with many attendees. At the UV workshop held after the NEWRAD conference, again people showed strong interest in the work of TC2-47 and the need for a new international standard for UV meters was evident. At the meeting, three labs (CSIRO, CSIR and HUT) promised to send their calibration procedures to the TCC and these will be put on the CIE website for member‚Äôs reference and discussion.  TCC would encourage other labs to send their procedures or other materials for discussion. Any suggestions or comments related to the new document or TC work are welcome.  TCC is preparing the 2nd draft of the TC document and will circulate it for comments shortly.

Archive

TC2-48 Spectral responsivity measurement of detectors, radiometers, and photometers.

Chair	George Eppeldauer (USA)	AD: Sauter
Member	Andor (Hungary), Austin (USA), Boivin (Canada), Bouman (USA), Coutin (France), Dezsi (Hungary), Gardner (Australia), Goodman (UK), Larason (USA), McArthur (Canada), Pietrzykowski (Poland), T Saito (Japan), Sauter (Germany), Webb (USA), Armin Sperling (Germany). Palmer (USA-deceased), Rattunde (Germany-deceased) - updated May 2007.
TR	To rewrite the technical report CIE 64 (1984) "Determination of the spectral responsivity of optical radiation detectors" to update device and measurement technology, and include the spectral irradiance responsivity measurement for radiometers and photometers from UV to near IR.
Email reflector	Addres / Message archive (password protected)	Subscriber list (password protected)
Draft Report	Members only (password requred) Minutes of 2007 Beijing TC meeting (doc) Draft 10, 2007-06-29 (pdf) also doc format
Status- July 2007	The TC met in Beijing with 40 participants. The 10th draft was distributed to the members and participants. The document, now 71 pages, is getting close to its final shape. The document is restricted to single element devices. Measurements of imaging devices have been left out. The Summary and Introduction have been modified because of this restriction. The Uncertainty chapter, using the contribution from Stefan Winter, has been extended with the correction for wavelength shift. An agreement has been made at the meeting to reference the TC2-43 uncertainty document that includes the mathematical methods based on GUM. (More report available in the minutes.)
Status- June 2006	The TC met on June 14, 2006 in Braunschweig (8th meeting). Draft 9 was distributed prior to the meeting, and discussed at the meeting. The uncertainty sections (3.6 and 3.7) have been expanded and this new information was also presented at the CIE Expert Symposium in a talk by Eppeldauer. Chapter 6 has been modified: only the recommendations relating to calibration now remain in the main text and information on instrumentation has been moved to the Appendix. A subsection on bandpass effects and corrections has also been added to this chapter. In the Appendix, a subchapter on the bandwidth normalization by moments has been removed. The references are now complete. Editor has started editing the document in CIE style. Some contributions to the uncertainty chapter from PTB (Sauter and Stefan Winter), are expected. Some more minor corrections and additions to improve the document further are expected before the final editing.
Status- May 2005	TC met in Leon. The TCC prepared the 7th draft, all chapters completed, and distributed to TC members in April. The draft was discussed at the meeting. There are no major issues. Last part on monochromator may probably be moved to Appendix. Section on bandpass correction will be re-examined in relation to work in TC2-60. After these changes are made, the draft will be close to a TC ballot. Next meeting is planned for Braunschweig.
Status- June 2004	The TC met on June 10, 2004 in Tokyo, with 29 participants. The 6th draft was presented and discussed. In the new draft, Chapter 6 has been extended with sub-chapter 6.4 on Filter Radiometers. Section 6.1 on monochromators is being extended by Palmer (USA) and he is also writing Section 6.3 on the Use of Narrow Bandpass Filters. Section 6.2 on Uniform sources is to be written by TCC. Chapter 8 on References has been added and it is being extended. Chapter 2 on Definitions is also being extended and the Terminology is being improved. The sub-chapters on Uncertainty need to be extended to include aspects related to correlation - Sauter volunteered to do this. The uniformity of the document is to be improved. Suggestions were made by Jiangen Pan to modify Figs. 2, 3, and 17, and also by Richard Distl to improve Figs. 17 and 18. Secretary requested that the new draft be distributed to the members in advance of the next meeting. (Draft 6 is now posted on the website for TC members)
Status- July 2003	The TC met on June 30, 2003 in San Diego, with 20 participants including 10 members.  The newly written 5th draft was presented and discussed. The new draft added Chapter 5 (spectral radiance responsivity) and a part of Chapter 6. Basic chapters of the report &endash; spectral radiant power responsivity, spectral irradiance responsivity, and spectral radiance responsivity - are now done.   The TC agreed on some changes to remove sections on responsivity for spectrally integrated quantities. Chapter 6 (spectral considerations in responsivity measurements) is to be completed for two more sections.  Chapter 7 (preamplifires for spectral responsivity measurements) is to be written.  Overall, 75 % of the report has been written.  Next draft will be prepared to incorporate comments received this time.
Status- Aug. 02	The TC met on Aug. 24, 2002 in Veszprem with 17 participants.  The scope of the report is to cover spectral responsivity in radiant power, irradiance, and radiance mode, in the 200 nm to 2.5 mm spectral region. The Fourth Draft was distributed and discussed in detail. Four chapters including chapter 3 on radiant power responsivity and chapter 4 on irradiance responsivity have been written.  Work on Chapter 5 (radiance responsivity) is to start shortly.  Several suggestions were made at the meeting, and the next version of the draft document is to be prepared before the San Diego meeting.

Archive

TC2-49 Photometry of Flashing Light

Chair	Yoshi Ohno (USA)	AD: Vandermeersch
Member	Carl Andersen (USA), Richard Austin (USA), Jan Berkhout (USA), Dennis Couzin (USA), Dave Ellis (USA), George Eppeldauer (USA), Irena Fryc (Hungary), David Gibbs (UK), Teresa Goodman (UK), Franz Hengstberger (South Africa), David King (USA), Orrevetellainen (Finland), Justin Rennilson (USA), Ken Sagawa (Japan), H. -J. Schmidt-Clausen (Germany), Georg Sauter (Germany), Ian Tutt (UK), Francoise Vienot (France), Pierce Webb (USA), Reiner Rattunde (Germany -deceased)- revised May 2007.
TR	Produce a technical report for photometric measurements of flashing light, including derivation of the photometric quantities applied to flashing light, measurement of light sources, and calibration of photometers for flashing light.
Documents	Members only (password requred) TC Draft 3.0 June 2007 (pdf 1.6 MB) Coast Guard paper analysis.pdf 1986 US Coast Guard paper.pdf Ohno CIE 2002_1.pdf Ohno CIE 2002_2.pdf Effective_Intensity_Calculator EXCEL (Latest version) Effective_Intensity_Calculator EXCEL (Coast Guard data analysis) Draft 2a April 2003 (doc 210 K)
Open documents	Activity Report April 2003 (doc 44 K) Ohno & Couzin's contributed paper (preprint) at CIE Symposium 2002 (pdf 900 K) Ohno's invited paper (preprint) at CIE Symposium 2002 (pdf 900 K)
Status- July 2007	he TC met in Beijing with 41 participants. The previous draft of 2002 simply described the existing three basic methods (Form Factor, Blondel-Rey and Allard), while Modified Allard method was proposed by D. Cousin and Y. Ohno. The previous meeting was 2002, when the TC agreed to obtain visual experimental data on Modified Allard method before it can be adopted. No experiments, however, have been conducted since then, while the industry kept stressing the needs for one standard method. While there is still a lack of measurements, data in a paper of the US Coast Guard from the 1986 dealing with trains of pulses agreed very well with the results of Modified Allard method. Based on these data, the TCC proposed to adopt Modified Allard as the recommended method. TCC wrote and distributed draft 3.0 prior to the meeting. The TC discussed this proposal at Beijing meeting, and after long discussion, the TC agreed to adopt this proposal, with several suggestions. The limitations of this method were discussed and will be described in the new draft. It was also decided to focus this report on effective intensity, not broadly measurement of flashing lights. Therefore, the terms of reference will be modified and the draft will be revised accordingly. During discussion it was noted that the restriction to white light has to be addressed somewhere in the document.
Status- June 2006	Progress has been slow, since the TC is still waiting for visual evaluation data. However the TCC wants to try to finish the rest of the document, as there is a strong desire to standardize one method for effective intensity. He mentioned that NIST has established a Vision Science project, within which it is planned to carry out some effective intensity experiments in a few years time. A guest researcher to work on such experiments would be welcome. DD asked TCC to try to finish the document except for the remaining issue. One option might be to separate effective intensity issue and finish the document only on physical measurement part. The TCC will try to follow that route.
Status- May 2005	The current draft document contains four methods. It is the plan to standardize on one method for measuring effective intensity, but little progress has been made recently due to lack of visual experiment data. A 1986 paper by US Coast Guard was found, which reported vision experiments on trains of pulses at different intervals, which agree well with Modified Allard results. NIST now has a post-doc vision scientist in their staff and expecting to start a vision science project where experiments on effective intensity are planned. On the other hand, TCC is also preparing to make a progress on the draft report without waiting for further experimental data.
Status- June 2004	There have been little progress since 2002. At the 2002 meeting, the focus was on the definition of effective intensity and standardization of the formula, which would need further visual experiments coordinated with D1. The TCC, however, has not found any member or group that plans to perform such experiments. Rattunde suggested that the TC should not wait for further experiments but rather complete the TC report with the current knowledge available, without recommending a single method for effective intensity. The TCC agreed with this suggestion, but emphasized that there is a strongly need for a standardized definition for effective intensity.
Status- July 2003	The TC last met in Veszprem in 2002. The TC has not come to a consensus on the definition of effective intensity.  TC formed a Working Group to formulate the experimental conditions of the required visual experiments and publicize a call for research.  The TCC is having communication by e-mail among WG members to start this process.
Status- Aug. 02	The TC met in Veszprem on Aug. 26, 2003. 7 members and 15 guests attended. Draft 2 (Aug. 2002) was distributed and discussed. Previous Sections 3 and 4 have been merged into one section.  Minor changes on the definition of terms were discussed and agreed. Section 4 (Effective Intensity), which described only the Form Factor method in the previous draft, has now been rewritten to include the three methods currently used, as a temporary treatment until a consensus can be reached for one best (recommended) method.  The TCC reported that Couzin & Ohno had carried out some calculations to compare the three methods and had developed the Modified Allard method, which was presented at the Symposium. There were considerable discussions on the new method and the validity of the conventional methods.  A consensus was that visual experiments are needed to evaluate the Modified Allard method, as well as the conventional methods, for trains of pulses and other specific pulses.  The TCC agreed to form a Working Group comprising experts from D1 and D2 (Schmidt-Clausen, Couzin, Vienot, Sagawa, Goodman, and Ohno) to formulate the experimental conditions of the required visual experiments and publicize a call for research.  Related documents will be posted on the website.
Status- Aug 02	The TC met in Veszprem on Aug. 24, 2003. 7 members and 15 guests attended. Draft 2 (Aug. 19, 2002) was distributed and discussed. Previous Sections 3 and 4 are merged into one section.  Minor changes on the definition of terms were discussed and agreed. Section 4 (Effective Intensity), which described only Form Factor method in the previous draft, has now been rewritten to include the three methods, as a temproary treatment until a consensus can be reached for one best method. Chairman reported that Couzin & Ohno made substantial calculation analyses to compare the three methods and developed Modified Allard method, which theoretically solves some inherent problems in Form Factor method and Blondel-Rey equation. Some details of the Modified Allard method were discussed but no consensus reached. TC agreed on the need for experimental validation of the Modified Allard method for further discussion. TC agreed to form a Working Group by experts from D1 and D2 within the TC to formulate the experimental conditions of the needed visual experiments and publicize a call for research.

Archive

 

TC2-50 Measurement of the optical properties of LED clusters and arrays

Chair	Georg Sauter (Germany)	AD: Vandermeersch
Member	Distl (Germany), Goodman (UK), Heidel (Germany), Kohmoto (Japan), Muray (USA), Ohno (USA), Oshima (Japan), Pan (China), Rattunde (Germany), Sauter (Germany), Steudtner (Germany), Stolyarevskaya (Russia), Young (USA) &endash; July 2004. - addition May 23, 2007
TR	To produce a technical report for the measurement of optical properties of visible LED arrays and clusters, to derive optical quantities for large LED arrays and recommendations for measurement methods and conditions.
Draft Report	<Members only - Passwrod required> Optical Measurement of LED Clusters and Arrays: Draft 1- June 2003 (PDF file)
Status- July 2007	C met in Bejing, attended by 17 members and 50 observers. The definition of terms ‚ED cluster‚ and ‚LED array‚was discussed again. Participants (especially manufacturers and users of LED clusters and arrays) were asked to select typical objects that need to be characterized and provide corresponding drawings/data-sheets. Members are asked to make proposals on how to measure these artifacts in regard to quantities of interest to industry. The measurement conditions for total luminous flux, luminance, chromaticity and homogeneity, and spatial distribution should have highest priority. Whenever a significant amount of heat is produced, temperature at a representative reference point on object should be stated in addition to ambient temperature.
Status- June 2006	The TC met on June 14, 2006 in Braunschweig with 64 participants. A first draft (Draft 1B) was distributed to members prior to the TC meeting. The meeting discussed definitions of some basic terms (modules, clusters, and arrays), how to measure photometric quantities (luminance, luminous flux, etc.) and how to describe uniformity in color (input from D1 suggested). It was requested that anybody with knowledge from other documents on definitions of terms e.g., in ISO, should contact the TCC.
Status- May 2005	The TC met in Leon, attended by 18 members and 18 guests. Schuette took over the chairmanship since last meeting in Tokyo. Email reflector was set up in March 2005. The first draft (Draft 1a, not complete) was distributed prior to the Leon meeting. The TC discussed scope, terminology, and two issues, 1) operating modes and 2) luminous intensity measurement. Normal far-field luminous intensity measurement will be included. Continuous and modulated operation modes shall be included in the scope while flashing light (covered by TC 2-49) and asynchronous pulses shall be excluded. The TCC asked for inputs from members, and hopes to update drafts before next meeting in Braunschweig.
Status- June 2004	The TC met on June 10, 2004 in Tokyo, attended by about 25 participants. G. Sauter announced his resignation as the TC chair and introduced J. Schuette as the proposed new chair. The change of the TC chair was approved by voting within the TC with no objections. The new chair ran the meeting. The TC discussed the issues to be addressed. It was agreed that many properties of LED arrays and clusters can (and therefore should) be measured in the same way as classical lamps. The TC should concentrate on quantities, effects or operating conditions where LED arrays and clusters have peculiarities. These are: 1. Measurement of luminance. 2. Effects of heating/self-heating. 3. Chromaticity. 4. Amplitude modulation. The scope should include signs and static displays, while dynamic displays are excluded. The TC member list will be reformed based on responses from the participants. An email reflector will be set up for continuing discussions.
Status- July 2003	The TC met in San Diego on July 1, 2003 with many attendees.  Draft 1 (proposed contents and scope of the technical report) was presented and discussed.  The TC agreed to cover combinations of structures of LEDs used for general illumination purposes as well as for signaling applications.  But the scope will be limited not to include displays in the general meaning. Some terms to be defined were also discussed. The TC will collect more inputs from the manufacturers and users of LED clusters and arrays to start drafting the report.
Status- Aug. 02	No report received.
Status- May 01	An informal discussion was held for about an hour right after the LED Symposium on May 12, with about 15 attendees. There were active discussions on definitions of LED cluster and necessary work to be done. Many new members were found, and further discussion will continue to form the plans for the document.
Status- Apr.00	The start of the work delayed due to major changes of the companies of the initial TC members who proposed the TC. However, at the last ad-hoc meeting on LEDs on April 6th, we are given clear directions of what to do. The proposals in IEC (TC34-A) on photometry of white LEDs include measurement of clusters and arrays, and the photometry part should be handled by CIE &endash; this TC. There is standardization work in progress in Japan, and this TC will be in close contact with the Japanese group. The work is urgent and the TCC expects active participation and contributions by many members. The specifications of LED lamp sources will be covered by IEC34-A (lamps) but the aspect of photometry will be transferred to CIE, which was agreed at the last October meeting in Kyoto.

Archive

TC2-51 Calibration of multi-channel spectrometers

Chair	Richard Austin (USA)	AD: Johnson
Member	T. Goodman (UK), G. Hopkinson (UK), S. Prince (UK), Pietrzykowski (Poland), R. Smith (USA), R. Bergman (USA) - to be updated
TR	To produce a technical report for the calibration of array spectroradiometers primarily for the determination of colorimetric and photometric quantities, including sources of error in array spectral measurements systems, evaluation of these errors, calibration methods and methods for the determination of uncertainty.
Status- July 2007	The TC met in Beijing with 39 attendees including 10 members. The member list needs to be updated. A new draft (Draft 2) was presented and discussed at the meeting.  It was proposed to have changes in the terms of reference to focus the report more on photometric and colorimetric quantities. The changes were approved by D2 with no objection. New TR: Produce a technical report for the calibration of detector array spectroradiometers primarily for the determination of colorimetric and photometric quantities, including performance characteristics, evaluation of these characteristics, calibration methods and guidance in the application of methods for the determination of uncertainty. A few other changes in the draft were agreed at the meeting. It was also suggested to look at the materials from TC2-30. The TCC plans possible additional meeting to solicit inputs by the end of the year.
tatus- June 2006	No report received this time. DD will ask TCC for update on this TC. If the TC keeps inactive, a new chairperson might be appointed. Peter Sperfeld was interested to take this on. Goodman mentioned a joint NPL-SIRA document on multi-channel spectrometers, produced several years ago, which could be used as a starting point. Hengstberger mentioned that a bibliography was produced before (though not published and probably outdated), which might also be looked at.
Status- May 2005	No report received.
Status- June 04	No report this time
Status- July 2003	The TC had a meeting in San Diego on June 30. The title of the document has changed to "Calibration, Characterization, and Use of Array Spectroradiometers." to reflect the contents of the document that have been agreed by the TC.  The document will cover all array type instruments.  The TR were also revised, and agreed by D2.  The new TR is: Produce a technical report for the calibration of array spectroradiometers primarily for the determination of colorimetric and photometric quantities, including sources of error in array spectral measurements systems, evaluation of these errors, calibration methods and methods for the determination of uncertainty. J. Palmer will edit and update the bibliography collected in TC2-30.  TCC requested that, if any one has bibliographic information, they should be sent to Palmer.  Member list and current draft (0.2a) will be submitted for posting on the website.  Next meeting will be scheduled before the end of this year, possibly in Germany.  (PowerPoint file available on the website.)
Status- Aug. 02	No progress reported since the last meeting in Gaithersburg.  The TC is to take over the materials from TC2-30 to consider use of these for the TC report. (See report for TC2-30)
Status- May 01	The TC met on May 14 at NIST, prior to this D2 meeting, in conjunction with CORM CR-6 subcommittee. The meeting was attended by about 40 participants including many guests. A suggestion was made to include CCD array spectroradiometers, and the TC agreed to change the title to be "Calibration of multi-channel spectrometers", and TR also to be changed accordingly. A proposed table of contents of the report was distributed and discussed. Some new items were added after discussion.
Status- Apr.00	The initial meeting will be held in Rochester in May 8-10 in conjunction with CORM2000. CORM has a new committee CR6 on this subject which Austin is assisting. A first draft planned before the Rochester meeting.

Archive

Chair	Guy Vandermeersch	AD: Vandermeersch
Member	Antonio Corrons (Spain), Allan Ottosson (Sweden), Reiner Rattunde (Germany), Christine Stratford (UK), Magchiels Armand (Belgium), Bruno Weiss (Germany), Lou Bedocs (UK), John Arens (USA), Giuseppe Rossi (Italy), Peter Raynham (UK) - revised June 2003
TR	To produce an addendum to CIE publication 121 containing specific requirements for the photometry of emergency lighting luminaires, in particular to provide additional correction factors on the relative output of the luminaires at specified times of operation.
Draft Report	Members only (password required) Draft v5 (Oct. 2007) being prepared for Division ballot
Feb. 2008	TCC sent Draft v5 (Oct. 2007) to the Editor requesting Division ballot. The draft was edited after discussion on a few points, and was sent to CIE CB on 2008.3.10 requesting Division/BA ballot.
Status- July 2007	he latest draft went through TC ballot, and was rejected by members from the UK because of a method used in the draft concerning the total luminaire luminous flux output which is not useable for lighting designers. As this method is based on an existing IEC standard, there is a difficult situation which must be solved. A revision of the IEC standard is in discussion but the progress is unclear. Therefore, it was discussed during the division meeting, whether a report with an appendix on the minority viewpoint may be a solution. Further discussions with members and manufacturers will take place in the near future
Status- June 2006	The draft document is ready to be sent to Editor prior to TC ballot. This document introduces methods for EBLF measurements on ballasts. The new concept of EBLF has been now accepted worldwide by emergency ballast manufacturers following the publication in October 2006 of IEC standard 61347-2-7 "Particular requirements for D.C. supplied Electronic ballasts for emergency lighting"
Status- May 2005	The draft document is at final stage. The task is being done in IEC. The Emergency Lighting Panel in IEC34 introduced a new parameter, emergency ballast lumen factor (EBLF). This factor is very low, near 10 %, and varies in time due to battery operation. At the London meeting, modification was made to introduce dynamic behavior of lamp in the first 15 seconds. This modification was accepted in IEC 34 in Oslo last September. Now the document is under national vote. This is a 16 page document. All the requirements of laboratory conditions, etc., are in CIE 121. As soon as this is accepted, the TC will prepare the addendum to CIE 121.
Status- June 2004	TCC plans both TC2-23 and 2-52 meetings in September 2004 in Brussels or France. He will start the final official enquiry within TC2-52 on the photometry of emergency lighting at the end of June, after the London IEC 34 meetings. The concepts he promoted regarding emergency ballast lumen factor are in a voting stage in IEC and as soon as approved, CIE can definitively publish the TC document. As he explained several times, IEC has the mandate to decide what to measure (the safety concept EBLF) and CIE should provide recommendations on how to make the measurements. As he was working in both bodies he could coordinate the two approaches.
Status- July 2003	The TC met in Veszprem in Berlin on 18 November 2002, and in San Diego on 30 June 2003. The TC work relates to work in D5, IEC and CEN. There has been good progress in IEC for the evaluation of lighting performance of emergency electronic ballasts by introducing the concept of emergency mode ballast lumen factor. This has been approved by IEC, but the document is still before voting stage. CIE TC 5-19 has also arrived to a final draft on emergency lighting. So no further delay is necessary for achieving TC2-52 work. Within TC 2-52 the draft 2b - June 2003 was examined and approved in San Diego. After consideration of all comments, it was agreed that a final draft 3 &endash; September 2003 would be issued for TC ballot. In parallel the draft will be submitted to D2 Editor.  It is hoped that this technical report numbered CIE 121- Part 2-1 will be submitted for D2 ballot before next D2 meeting.
Status- Aug. 02	The TC met on Aug. 26 in Veszprem. The first draft was presented and discussed.  The TC work relates to work in D5, IEC and CEN. There has been good progress in IEC. There were three international meetings and one workshop for the past year. There has been a good solution for evaluation of lighting performance of centrally supplied luminaires, a concept of emergency mode ballast lumen factor. This has been approved by IEC, but the document is still before voting stage. Regarding self-contained emergency luminaries, work is being carried out in IEC 592-2-22. The TCC intends to have another meeting in October in Brussels.