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Proceedings Paper

Fast Ronchi test base on a liquid crystal display
Author(s): Qingkui Xi; Lei Chen; Rihong Zhu; Yunchen Li; Xueliang Bai
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Paper 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.

Paper Details

Date Published: 10 February 2005
PDF: 6 pages
Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); doi: 10.1117/12.574093
Show Author Affiliations
Qingkui Xi, Nanjing Univ. of Science and Technology (China)
Lei Chen, Nanjing Univ. of Science and Technology (China)
Rihong Zhu, Nanjing Univ. of Science and Technology (China)
Yunchen Li, Nanjing Univ. of Science and Technology (China)
Xueliang Bai, Nanjing Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 5638:
Optical Design and Testing II
Yongtian Wang; Zhicheng Weng; Shenghua Ye; Jose M. Sasian, Editor(s)

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