Fast Ronchi test base on a liquid crystal display

Qingkui Xi; Lei Chen; Rihong Zhu; Yunchen Li; Xueliang Bai

doi:10.1117/12.574093

10 February 2005 Fast Ronchi test base on a liquid crystal display

Qingkui Xi, Lei Chen, Rihong Zhu, Yunchen Li, Xueliang Bai

Proceedings Volume 5638, Optical Design and Testing II; (2005) https://doi.org/10.1117/12.574093
Event: Photonics Asia, 2004, Beijing, China

Abstract

A combination of a small liquid crystal display, conventional Ronchi test and fringe-scanning test is used to measure an aspheric wavefront or a large wavefront aberration system, faster and more exacting. Instead of a common grating and a step-motor, a movable image of grating is showed in a liquid crystal display. This gets rid of the error that caused by grating moving or motor rotating. A formula of the light intensity of the two dimensional grating, which a liquid crystal display owns, is derived. 12-step phase-shifting algorithm is used to test a lens, and the large wavefront aberration of the lens is restored.

Citation Download Citation

Qingkui Xi, Lei Chen, Rihong Zhu, Yunchen Li, and Xueliang Bai "Fast Ronchi test base on a liquid crystal display", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); https://doi.org/10.1117/12.574093

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