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Proceedings Paper

Null test of aspheric surfaces in zone-plate interferometer
Author(s): Junejei Huang; Chihui Chang
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Paper 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.

Paper Details

Date Published: 20 October 1992
PDF: 9 pages
Proc. SPIE 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation, (20 October 1992); doi: 10.1117/12.132178
Show Author Affiliations
Junejei Huang, Industrial Technology Research Institute (Taiwan)
Chihui Chang, Industrial Technology Research Institute (Taiwan)

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

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