Optical encoder based on the Lau effect

被引：45

作者：

Crespo, D

Alonso, J

Morlanes, T

Bernabeu, E

机构：

[1] Univ Complutense Madrid, Fac Ciencias Fis, Dept Opt, E-28040 Madrid, Spain

[2] Fagor Automat S Coop, Dept I&D, Mondragon 20500, Guipuzcoa, Spain

来源：

OPTICAL ENGINEERING | 2000年 / 39卷 / 03期

关键词：

optical encoder; Lau effect;

D O I：

10.1117/1.602432

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An optical encoder based on the Lau effect is presented. It is shown that this system has several advantages over standard optical encoders based on the moire effect, such as smaller sensitivity to variations in the gap between gratings and higher design simplicity. Problems due to the quality of the collimated beam, which are present in moire-effect-based encoders, are also avoided. Two different optimized designs for different resolutions are presented. Experimental measurements, in good agreement with the model developed by us, are presented. (C) 2000 Society of Photo-Optical instrumentation Engineers. [S0091-3286(00)02603-9].

引用

页码：817 / 824

页数：8