A simple roll measurement method based on a rectangular-prism

被引：27

作者：

Zhai, Yusheng ^{[1
]}

Feng, Qibo ^{[1
]}

Zhang, Bin ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Minist Educ, Key Lab Luminescence & Opt Informat, Beijing 100044, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2012年 / 44卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Roll measurement; Rectangular prism; Laser collimation; MEASUREMENT SYSTEM;

D O I：

10.1016/j.optlastec.2011.11.021

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel roll measurement method based on a rectangular-prism is presented. A collimated beam is normally incident upon a rectangular-prism with splitting film, and it is divided into two parts, the reflected and the transmitted beams. The displacements of the reflected and the transmitted beams are measured by two quadrant photoelectric detectors QD(1) and QD(2), respectively. The displacement change in they-axis caused by roll can be measured with differential measurements from two quadrant photoelectric detectors. Theoretic analyses show that the crosstalk of straightness errors and yaw errors are avoided, and the crosstalk of the pitch alpha can be neglected by adopting differential measurements because the direction changes of the reflected and the transmitted beams are both double the changes of pitch. In this way, the stability for the roll measurement can be greatly enhanced. The systemic model is established and the feasibility of such a system is verified by theoretical analysis and experiments. The resolution of 0.3 '' and measurement accuracy of 2 '' can be obtained by the set-up measurement system. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：839 / 843

页数：5

共 11 条

[1]

Chen Lei, 2003, J OPTOELECTRONICS LA, V14, P625

[2]

Chung Sung-Chong, 1998, P ASPE ANN M, V18, P445

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