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| 一种朗契检验新方法 | |
| 引用本文： | 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):452-455. |
| 作者姓名： | 席庆奎 陈磊 李迎春 白雪莲 朱日宏 |
| 作者单位： | 1. 南京理工大学电光学院,南京,210094;南京农业大学,南京,210095 2. 南京理工大学电光学院,南京,210094 |
| 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. |
| 关 键 词： | 光电子学 朗契检验 液晶显示器 移相干涉 |
| 收稿时间： | 2005-05-15 |
| 修稿时间： | 2005年5月15日 |
A New Ronchi Test Method |
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| Xi Qingkui,Chen Lei,Li Yingchun,Bai Xueliang,Zhu Rihong.A New Ronchi Test Method[J].Acta Photonica Sinica,2006,35(3):452-455. | |
| Authors: | Xi Qingkui Chen Lei Li Yingchun Bai Xueliang Zhu Rihong |
| Institution: | 1 School of Electron and Photoelectron,Nanjing University of Science and Technology,Nanjing 210094 2 Nanjing Agricaltural University,Nanjing 210095 |
| 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. |
| Keywords: | Optoelectronics Ronchi test Liquid crystal display Phase-shifting interference |
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