Null test of aspheric surfaces in zone-plate interferometer

Junejei Huang; Chihui Chang

doi:10.1117/12.132178

20 October 1992 Null test of aspheric surfaces in zone-plate interferometer

Junejei Huang, Chihui Chang

Proceedings Volume 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation; (1992) https://doi.org/10.1117/12.132178
Event: International Symposium on Optical Fabrication, Testing, and Surface Evaluation, 1992, Tokyo, Japan

Abstract

Instead of using lenses or mirrors as a null compensator, the construction of the zone plate interferometer is used to accomplish the null test. By choosing the focal length of the zone plate according to the radius of curvature and conic constant of the test surface, the conventional zone plate interferometer is modified to be a null test of concave conicoids. To test convex conicoids, an imaging lens is added between the zone plate and the test surface. As long as the zone plate is perfectly imaged into the center of the curvature of the test surface, a null test of convex conicoids is the same as that of concave ones.

Citation Download Citation

Junejei Huang and Chihui Chang "Null test of aspheric surfaces in zone-plate interferometer", Proc. SPIE 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation, (20 October 1992); https://doi.org/10.1117/12.132178

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