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Proceedings Paper

Fringe contrast improvement in Twyman-Green interferometer for lens test
Author(s): Hitoshi Ohashi; Yoichi Iba; Toshiro Okamura
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Paper Abstract

With respect to the cases of observing the wavefronts passing through a lens, studies were made for improving the fringe contrast from both aspects, temporal coherence and spatial coherence, of the light sources of interferometers. Experiments based on the studies also were done, employing an excimer laser and a projection lens as the light source of a Twyman-Green interferometer and the lens under test, respectively, which the experiments showed had preferable results. There is, however, a possible problem which could occur if the lens under test is not corrected for chromatic aberration.

Paper Details

Date Published: 20 October 1992
PDF: 11 pages
Proc. SPIE 1720, Intl Symp on Optical Fabrication, Testing, and Surface Evaluation, (20 October 1992); doi: 10.1117/12.132148
Show Author Affiliations
Hitoshi Ohashi, Olympus Optical Co., Ltd. (Japan)
Yoichi Iba, Olympus Optical Co., Ltd. (Japan)
Toshiro Okamura, Olympus Optical Co., Ltd. (Japan)

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

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