Draft Minutes
ASC OP/TF 3 Optics and Electro-Optical Instruments Optical Elements and Assemblies Wavefront Standard
Sunday, January 25, 2009
1:30 p.m. 5:00 p.m.
Fairmont Hotel, California Room
170 South Market Street
San Jose, CA 95113
Attending
Committee Members (15 of 22 w/2 alt.)
Representing (Parent Organization)
David Aikens
Savvy Optics Corp.
Gordon Boultbee (Alternate)
JDSU
Andre Brunfeld
Xyratex
Benjamin Catching
JDSU
Walter Czajkowski
APOMA (Edmund Optics)
Jessica DeGroote Nelson (by phone) (Alternate)
Optimax Systems, Inc.
Marla Dowell
IEEE/LEOS
Marla Dowell
NIST
Lincoln Endelman
SPIE (Endelman Enterprises)
Chris Evans
Zygo Corporation
Ulph Griesmann
OSA (NIST)
Krishna Gupta (Alterante)
Zygo Corporation
John M. Hamilton
Northrop Grumman Corporation
Hal Johnson
Harold Johnson Optical Lab
Allen Krisiloff
Triptar Lens Company, Inc.
Gene Martin
Individual
Stephen Martinek
4D Technology
Jonathan McGuire
Northrop Grumman Laser Systems
Wayne McKinney (Alternate)
Lawrence Berkeley National Lab
Rick Plympton
Optimax Systems, Inc.
William Royall
Eastman Kodak Company (Retired)
Peter Z. Takacs (by phone)
Brookhaven National Lab
Trey Turner
Research Electro-Optics, Inc.
Ray Williamson
Ray Williamson Consulting
Dr. Valeriy V. Yashchuk
Lawrence Berkeley National Lab
Observers (4)
Lahsen Assoufid
Argonne National Laboratory
Donna Howland
Northrop Grumman Aerospace Systems
Gene Kohlenberg
OEOSC
Bruce Netherton
Lockheed Martin Space Systems
Steven VanKerkhove
Corning Tropel
04/10/09 03:04:35 PM
File: TF 3 Wavefront Draft Minutes, 1-25-09.odt
ASC OP1 Optics and Electro-Optical Instruments Optical Elements and Assemblies Wavefront Standard, Continued
Auditor's Summary of Meeting
Two draft standards were examined at this meeting: OP1.004 statistical methods for measuring wavefronts and surfaces
and OP1.005 deterministic methods for measuring wavefronts and surfaces. New versions of the drafts will be written based
upon the technical discussions during this meeting. The Task Force will meet again in Rochester, NY in May 2009.
1. Welcome and Introductions
C. Evans opened the meeting at 1:32 p.m. with a round of introductions.
2. Adoption of Agenda
D. Aikens moved to adopt the draft agenda. H. Johnson seconded the motion, which carried unanimously.
3. Approval of draft minutes of the Tuesday, October 21, 2008 meeting
B. Catching moved that the draft minutes be accepted; R. Plympton seconded the motion; the motion carried unanimously.
4. Wavefront Standards
a) OP1.004 statistical methods for measuring wavefronts and surfaces
P. Takacs discussed his draft of BSR/OEOSC OP1.004-090122. His talking points are in OP1.004 discussion doc.pptx.pdf. He
also presented some PSD examples that he generated using Mathmatica. These documents accompany the minutes on the optstd.org
website.
D. Aikens suggested the OP use the same notation as used in ISO 10110-8, but OP1.004 should define slope.
D. Aikens said that since the Task Force hopes to offer this document as a draft for an international standard, it should be aware
that ISO requires a definition to be only one sentence without any equations. The equations would go in the next section after
definitions.
W. McKinney said that most surfaces are isotropic. Many practitioners rotate the 1D PSD and rotate it to get an r- PSD. This
confuses the constants in front of the integrals. He asked if the technique should also be part of the standard. P. Takacs agreed that
there could be a discussion concerning converting Cartesian data into r- data. This could be useful for those who want to do scattered
light calculations. D. Aikens said that these are already defined in ISO 10110-8; however, hese definitions may not be mathematically
vigorous. If the optics industry does want radial and tangential profile PSDs because they are more intuitive, this standard could
define them more mathematically rigorous.
C. Evans added that he has seen drawing specifications that limit the magnitude of a radial PSD and a circumferential PSD. He
also has seen specifications that call for the average of two linear PSDs in orthogonal directions. The standard should either
discourage these types of specifications, or define them in such a way that they can be understood.
S. Martinek said that the standard could define how the Cartesian and r- approaches, but the standard should not specify which is
to be used.
P. Takacs said that he will continue working on the draft.
The Task Force recessed at 2:35 p.m. and reconvened at 2:43 p.m.
b) OP1.005 deterministic methods for measuring wavefronts and surfaces
C. Evans prepared discussion notes (OP1005Discussion.pdf), which accompany these minutes on the optstd.org website.
D. Aikens suggested that section 4 should simply say, "Drawing notations shall be per ISO 10110-5 and ISO 10110-14. Where
those standards do not provide adequate indications, the indications will be made in a note."
D. Aikens continued that the rest of the document should be grouped so that it would fit more easily into the ISO format.
Literature becomes Bibliography. Informative references are moved to the Bibliography, and normative references appear early in
the standard.
L. Endelman suggested that "Expression of measurement results" should be "Test Results."
D. Aikens suggested that items 6 10 should be subheadings under section 5.
C. Evans then went through his draft to solicit comments on content. There was a discussion concerning the use of bandwidth in
reference to section 3.5.
D. Aikens suggested that for section 3.7, "Slope," users could be told that they have to choose their own orthogonal set of
polynomials to use when the optics has a rectangular aperture. The polynomial fit to the wavefront is smooth and can be used to
compute slope.
C. Evans suggested that there be a separate discussion concerning slope measurement. R. Plympton said that J. Degroote Nelson
would be available for that discussion.
D. Aikens suggested that Note 2 in 3.8 be dropped.
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ASC OP1 Optics and Electro-Optical Instruments Optical Elements and Assemblies Wavefront Standard, Continued
The group agreed that this standard will assume that measurements are made normal to the wavefront.
The Task Force recessed at 4:00 p.m. and reconvened at 4:12 p.m.
C. Evans discussed conformance in Section 5 on pages 3 6 of OP1005Discussion.pdf. D. Aikens suggested that as a result of
this discussion there is no default uncertainty. For commercial optics uncertainty is ignored. For high-quality optics, uncertainty is
important. The decision rule for uncertainty should be moved to the Annex.
5. Time and Place for next OP/TF 3 Wavefront Meeting
R. Plympton moved that the next meeting be held in Rochester, NY; D. Aikens seconded the motion, which carried.
6. Adjournment
W. Czajkowski moved that the meeting be adjourned. R. Williamson seconded the motion. The meeting was adjourned at
5:02 p.m..
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