光子学报, 2006, 35 (3): 0452, 网络出版: 2010-06-03
一种朗契检验新方法
A New Ronchi Test Method
摘要
为了较快、较高准确度地检验大波差的非球面或球面,将一个液晶显示器作为低频光栅和移相装置被用于朗奇检验,在小液晶显示器上由计算机生成光栅图,代替普通光栅和步进电机.消除了因电机移动引起的移相误差,消除了因转动光栅的角度不能正好达到90°而引起的误差.以一个非球面为例,做了移相测试及波面复原.实验表明液晶显示器可作为一个光栅和移相装置.
Abstract
A small liquid crystal display that acted like a grating and phase-shifting device was used on Ronchi test,to measure a spheric or an aspheric of large wavefront aberration,more quickly and accurately.Instead of a common grating and a step motor,a movable image of grating is shown on the liquid crystal display. This gets rid of the phase-shifting error caused by the motor moving,and the error caused by grating revolve angle not being just 90°. A phase-shifting algorithm is used to test an aspheric,and the wavefront aberration of the aspheric is restored. The experiment shows that a small liquid crystal display can be used a grating and phase-shifting device.
席庆奎, 陈磊, 李迎春, 白雪莲, 朱日宏. 一种朗契检验新方法[J]. 光子学报, 2006, 35(3): 0452. Xi Qingkui, Chen Lei, Li Yingchun, Bai Xueliang, Zhu Rihong. A New Ronchi Test Method[J]. ACTA PHOTONICA SINICA, 2006, 35(3): 0452.