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Proceedings Paper

Novel method for precise focal length measurement
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Paper Abstract

A new technique for precise focal length measurements by use of a hologram is presented. The hologram is used in first order diffraction to emulate the reflective properties of a convex spherical mirror when performing null tests with a phase-shifting interferometer. The hologram, comprised of concentric reflective rings (much like a Fresnel zone plate), is written lithographically and offers a higher degree of precision, at lower cost, than its spherical mirror counterpart and many other potential measurement techniques.

Paper Details

Date Published: 23 December 2002
PDF: 8 pages
Proc. SPIE 4832, International Optical Design Conference 2002, (23 December 2002); doi: 10.1117/12.486480
Show Author Affiliations
Brian J. DeBoo, Optical Sciences Ctr./Univ. of Arizona (United States)
Jose M. Sasian, Optical Sciences Ctr./Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 4832:
International Optical Design Conference 2002
Paul K. Manhart; Jose M. Sasian, Editor(s)

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