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Proceedings Paper

Zone-plate null interferometer for measuring aspherical mirror with large aperture
Author(s): Toshio Honda; Y. Kawamoto; Haike Guan; Masahiro Yamaguchi; Nagaaki Ohyama
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Paper Abstract

A new computer generated hologram (CGH) zone-plate common path interferometer which can be used for testing an aspherical mirror with large aperture is presented. A CGH zone- plate made by laser beam drawing is used as the null optical element and its diffraction of (0, 0) and (+1, +1) orders are used as reference light and test light, respectively. Therefore, stigmatic points can be formed so as to use spatial filter effectively to get rid of extraneous light. As a result, fringes with high S/N can be obtained.

Paper Details

Date Published: 20 October 1992
PDF: 6 pages
Proc. SPIE 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation, (20 October 1992); doi: 10.1117/12.132137
Show Author Affiliations
Toshio Honda, Tokyo Institute of Technology (Japan)
Y. Kawamoto, Tokyo Institute of Technology (Japan)
Haike Guan, Tokyo Institute of Technology (Japan)
Masahiro Yamaguchi, Tokyo Institute of Technology (Japan)
Nagaaki Ohyama, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 1720:
Intl Symp on Optical Fabrication, Testing, and Surface Evaluation

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