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Proceedings Paper

Figure metrology of deep general aspherics using a conventional interferometer with CGH null
Author(s): Steven M. Arnold; L. Curt Maxey; JoEllen Rogers; Robert C. Yoder
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Paper Abstract

We present a simple and general method of aspheric figure metrology using a CGH null mounted in the test beam of a conventional Fizeau or Twyman-Green interferometer. A 'standard' reflective CGH is used to establish optical alignment with respect to the interferometer's spherical test beam. This alignment is then mechanically trnaferred to a custom CGH null. The accuaracy of the alignment transfer is readily verified. The test method has been modeled by raytracing and verified experimentally by testing a perforated 8 inch F/1.5 on-axis paraboloid and a 50 mm off-axis paraboloid from their centers of curvature.

Paper Details

Date Published: 8 September 1995
PDF: 11 pages
Proc. SPIE 2536, Optical Manufacturing and Testing, (8 September 1995); doi: 10.1117/12.218413
Show Author Affiliations
Steven M. Arnold, Diffraction International Ltd. (United States)
L. Curt Maxey, Martin Marietta Energy Systems, Inc. (United States)
JoEllen Rogers, Martin Marietta Energy Systems, Inc. (United States)
Robert C. Yoder, Martin Marietta Energy Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 2536:
Optical Manufacturing and Testing
Victor J. Doherty; H. Philip Stahl, Editor(s)

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