Zone-plate null interferometer for measuring aspherical mirror with large aperture

Toshio Honda; Y. Kawamoto; Haike Guan; Masahiro Yamaguchi; Nagaaki Ohyama

doi:10.1117/12.132137

20 October 1992 Zone-plate null interferometer for measuring aspherical mirror with large aperture

Toshio Honda, Y. Kawamoto, Haike Guan, Masahiro Yamaguchi, Nagaaki Ohyama

Proceedings Volume 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation; (1992) https://doi.org/10.1117/12.132137
Event: International Symposium on Optical Fabrication, Testing, and Surface Evaluation, 1992, Tokyo, Japan

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.

Citation Download Citation

Toshio Honda, Y. Kawamoto, Haike Guan, Masahiro Yamaguchi, and Nagaaki Ohyama "Zone-plate null interferometer for measuring aspherical mirror with large aperture", Proc. SPIE 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation, (20 October 1992); https://doi.org/10.1117/12.132137

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