Simultaneous measurement of two parameters of the spherical lens by low-coherence interferometry

Ying Sun; Takanori Nomura

doi:10.1117/12.2573173

10 October 2020 Simultaneous measurement of two parameters of the spherical lens by low-coherence interferometry

Ying Sun, Takanori Nomura

Proceedings Volume 11548, Optical Design and Testing X; 1154815 (2020) https://doi.org/10.1117/12.2573173
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

To measure different parameters of a spherical lens simultaneously, a method by low-coherence interferometry with a low temporal coherent light source is proposed. This proposed method can obtain both the radius of curvature and the central thickness of a spherical lens in a single optical system. Owing to the property of low temporal coherence, the contrast of interference fringe pattern, hologram, varies with the optical path difference of an object beam and a reference beam. This enables the central thickness of the test lens to acquire with a Michelson interferometer. Simultaneously, the spherical shape of the test lens, namely the radius of curvature, can be obtained from a hologram which contains information of the wavefront curvature from the reflected beam of the spherical surface of the test lens.

Conference Presentation

Citation Download Citation

Ying Sun and Takanori Nomura "Simultaneous measurement of two parameters of the spherical lens by low-coherence interferometry", Proc. SPIE 11548, Optical Design and Testing X, 1154815 (10 October 2020); https://doi.org/10.1117/12.2573173

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