Research on Features of Collimated LED Beam in Optical Encoder

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Research on Features of Collimated LED Beam in Optical Encoder

Article | 更新时间：2020-08-12

- Research on Features of Collimated LED Beam in Optical Encoder
- Optics and Precision Engineering Vol. 17, Issue 4, Pages: 750-756(2009)
- 作者机构：
  
  1. 安徽财贸职业学院
  2. 安徽大学电子科学与技术学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：30 June 2008，
  
  Revised：17 August 2008，
  
  Published Online：25 April 2009，
  
  Published：25 April 2009
- 稿件说明：
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朱孝立. 光电编码器LED光源准直特性研究[J]. 光学精密工程, 2009,17(4):750-756

Research on Features of Collimated LED Beam in Optical Encoder[J]. Optics and precision engineering, 2009, 17(4): 750-756.
朱孝立. 光电编码器LED光源准直特性研究[J]. 光学精密工程, 2009,17(4):750-756 DOI：

Research on Features of Collimated LED Beam in Optical Encoder[J]. Optics and precision engineering, 2009, 17(4): 750-756. DOI：

摘要

发光二极管（LED）光束的准直度对光电编码器性能影响很大。通过分析光源辐射角对光栅光通量的影响，运用图像旋转理论和频域分析方法，导出莫尔条纹透光特性函数式并且获得不同a’值下的莫尔条纹仿真波形，分析了光源准直特性对莫尔条纹对比度和光栅最大允许间隙的影响，实验结果与仿真波形吻合。本文对高可靠性编码器设计和生产具有参考价值。

Abstract

The collimation degree of the light beam of LED exerts a tremendous influence to the performance of optical encoder. Through analyzing the impact that the radiation angle of light source has on flux

and applying of Rotation matrix and frequency-domain solution

authors have lead to moiré patterns’ light distribution function as well as its simulation waveform with various slit width. Furthermore

they analyze the influence of collimated light source to the contrast ration of moiré patterns and the max gap of grating

whose result shows the identity with the simulation waveform. Therefore

this paper is very helpful to the design and the production of the high quality encoder.

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Related Institution

National Key Laboratory of Optical Technology and Instruments， Zhejiang University Group

Key Laboratory of Time-gate Sensing and Advanced Detection Technology of Chongqing， Banan

Engineering Research Center of Mechanical Testing Technology and Equipment， Ministry of Education， Chongqing University of Technology， Banan

Space Department III， Changchun Institution of Optics，Fine Mechanics and Physics， Chinese Academy of Sciences

School of Computer & Communication Engineering， University of Science and Technology Beijing

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