2000 Minutes


CORM CR3 Meeting Minutes
Monday, May 8th, 2000
1:00 - 2:30 pm
Marriott Airport Hotel, Salon Room C


Attendees
Yoshi Ohno, NIST (Chair)
Richard Austin, Gamma Scientific (member)
Rolf Bergman, GE Lighting (guest)
Paul Boynton, NIST (guest)
Ellen Carter, Minolta Corp. (guest)
Dennis Couzin, Avery Dennison (guest)
Thomas Deverell, Eastman Kodak (guest)
DeLyle Eastwood, U. South Carolina (guest)
David Ellis, ITS/ETL (member)
Ahmad Fedai, Federal Signal Corp. (member)
Jim Gardner, NML-CSIRO (guest)
Gary Gauer, Reflexite Corp. (guest)
Charles Gibson, NIST (guest)
Dave Gross, Osram Sylvania (member)
Gary Graham, Eastman Kodak (guest)
Herbert Hoover, Corning Inc. (guest)
Mike Jergens, Rockwell Collins (member)
Wayne Keemer, Eastman Kodak (guest)
Clarence Krueger, Polaroid (member)
Keith Lykke, NIST (guest)
Greg McKee, Labsphere, Inc. (member)
Tim Moggridge, Instrument Systems (guest)
Kathleen Muray, Inphora Inc. (member)
J. Rennilson, RCS (member)
Ken Richardson, Instrument Systems (member)
R. Ruff, Opto-Cal (member)
John Setchell, Eastman Kodak (guest)
Lon Smith, Eastman Kodak (guest)
Geoffrey Torrington, Honeywell (guest)
Richard Young, Optronic Laboratories, Inc. (member)
Gene Zerlaut, SC-International Inc. (new member)


Handouts
1) Agenda and May 99 CR3 meeting minutes (distributed 6/3/99)
2) Fourth (final) draft of the Directory of Calibration and Testing Laboratories for Photometry and Radiometry
3) Revised Table II for the Robertson's 1968 paper for CCT
4) CR3 Roster (May 6, 2000)


1. Directory of Calibration and Testing Laboratories
Prior to this meeting, the fourth (final) draft was prepared by R. Daubach (Publicatiion Committee) following the decision by the BoD meeting in January. Acknowledgement was made to R. Daubach for his work on reformatting the document and resolving the problems. The entries of national standardizing laboratories have been removed and their website references added. The final draft was distributed at the meeting for verification by the attendees. A suggestion was made by R. Young to add a sentence: "This directory will be revised periodically. For any changes of the listed information, contact xxxx." G. Zerlaut pointed out that the items listed for accreditation were not consistent (e.g., ISO9000 is not laboratory accreditation). The chairman answered that the Directory simply shows the responses in the survey as they were received. There was a question whether we could send a copy of this Directory to other organizations to introduce this publication. R. Austin will ask this question at BoD meeting. There were comments that it would be nice to publish this directory on the CORM website and update it periodically. M. Jergens explained that this was discussed before and we have limitation on the website use: this will be discussed again at BoD. With these comments, the final draft of the Directory was agreed upon by the attendees. The chairman sent these comments to Publication Committee. (As of May 17, CORM Secretary has received the final manuscript from Pub. Committee, and the document is in printing process.)

2. Follow-up on intercomparison of CCT calculation
Regarding the small discrepancies found in the calculation using Robertson's 1968 paper due to outdated table values (pointed out by R. Young), a revised table was kindly sent from Alan Robertson. The new table was distributed at the meeting (also attached to the minutes) and acknowledgment made to Robertson. Related to this issue, the progress in CIE TC1-48 (revision of CIE 15.2) concerning calculation of CCT and other issues was reported by the chairman for information to the attendees. E. Carter, who attended the last TC1-48 meeting in London this April, added the latest information that the committee agreed to keep the 1960 u,v diagram for CCT calculation.

3. Recent Progress in NIST Photometry project
The chairman made a short presentation on the two new projects at NIST photometry. NIST started a project to develop standard LEDs for luminous intensity, luminous flux, and color (chromaticity and dominant wavelength) as well as calibration methods for LEDs. Another project is to realize the total spectral radiant flux scale and develop standard lamps to calibrate integrating spheres spectrally. The 2000 NIST Photometry Short Course (Aug. 29 - Sep.1) was also introduced.


4. Other issues
The chairman mentioned another agenda item- Optical data correlation in chromaticity and luminance measurements &endash; which is still open and will hopefully be discussed at the next meeting. The chairman welcomed any new issues to be discussed at CR3. He also added that, when we finish the last agenda item and if there are no new issues raised, CR3 may close.

5. Next meeting
Next CR3 meeting is planned for CORM2001 at NIST, Gaithersburg, on Monday, May 14th, 2001.

* Additional note
During CORM2000, the chairman heard from CORM Secretary that he was running out of the Directory of Reference Documents on Photometry-1997 and would produce second prints. We decided to update the document on this opportunity, and CR3 will work on the revision of the Directory via email in a few week's timeframe.


Attachments
1. Revised Table II from A. Robertson
2. CORM CR3 Roster (update May 15, 2000)

Yoshi Ohno
CR3 Chair
(May 15, 2000)

: Revised Table II from A. Robertson

BLACK BODY COORD, SLOPES OF ISOTEMP LINES, AND MIREDS ON U-V DIAGRAM.- 31 POINTS
CALCULATED WITH (360,830,01), C2=1.4388CM*K, CIE 1931 OBSERVER(2 DEG.)

mrd u v slope in u-v diagram
0.0 0.18006 0.26352 -0.24341
10.0 0.18066 0.26589 -0.25479
20.0 0.18133 0.26846 -0.26876
30.0 0.18208 0.27119 -0.28539
40.0 0.18293 0.27407 -0.3047
50.0 0.18388 0.27709 -0.32675
60.0 0.18494 0.28021 -0.35156
70.0 0.18611 0.28342 -0.37915
80.0 0.1874 0.28668 -0.40955
90.0 0.1888 0.28997 -0.44278
100.0 0.19032 0.29326 -0.47888
125.0 0.19462 0.30141 -0.58204
150.0 0.19962 0.30921 -0.70471
175.0 0.20525 0.31647 -0.84901
200.0 0.21142 0.32312 -1.0182
225.0 0.21807 0.32909 -1.2168
250.0 0.22511 0.33439 -1.4512
275.0 0.23247 0.33904 -1.7298
300.0 0.2401 0.34308 -2.0637
325.0 0.24792 0.34655 -2.4681
350.0 0.25591 0.34951 -2.9641
375.0 0.264 0.352 -3.5814
400.0 0.27218 0.35407 -4.3633
425.0 0.28039 0.35577 -5.3762
450.0 0.28863 0.35714 -6.7262
475.0 0.29685 0.35823 -8.5955
500.0 0.30505 0.35907 -11.324
525.0 0.3132 0.35968 -15.628
550.0 0.32129 0.36011 -23.325
575.0 0.32931 0.36038 -40.77
600.0 0.33724 0.36051 -116.45