Rapid-testing system for intensity spatial distribution characteristics of LED

LIU Xian-ming; YE Xiao-guang; CHEN Wei-min; LEI Xiao-hua

doi:10.3788/OPE.20152313.0126

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Rapid-testing system for intensity spatial distribution characteristics of LED

更新时间：2020-08-13

- Rapid-testing system for intensity spatial distribution characteristics of LED
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 127-133(2015)
- 作者机构：
  
  重庆大学光电工程学院光电技术及系统教育部重点实验室重庆,400044
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0126
  CLC： TN312.8
- Received：15 June 2015，
  
  Revised：03 July 2015，
  
  Published：14 November 2015
- 稿件说明：
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刘显明, 叶小广, 陈伟民等. 发光二极管光源空间光分布特性快速测量系统[J]. 光学精密工程, 2015,23(10z): 127-133

LIU Xian-ming, YE Xiao-guang, CHEN Wei-min etc. Rapid-testing system for intensity spatial distribution characteristics of LED[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 127-133
刘显明, 叶小广, 陈伟民等. 发光二极管光源空间光分布特性快速测量系统[J]. 光学精密工程, 2015,23(10z): 127-133 DOI： 10.3788/OPE.20152313.0126.

LIU Xian-ming, YE Xiao-guang, CHEN Wei-min etc. Rapid-testing system for intensity spatial distribution characteristics of LED[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 127-133 DOI： 10.3788/OPE.20152313.0126.

摘要

为实现发光二极管(LED)光源空间光分布特性的出厂快速检验

构建了一套空间光分布快速测量系统。该系统利用光纤进行光收集

统一获取与传输LED光源的空间光能量

并使用接触式图像传感器完成统一的光电转换。建立了传感器输出与对应光强之间的关系

提出了使用参考光源矫正的方法得到光源光强分布并使用相关系数表征光源之间的光分布一致性。实验结果表明

系统测量结果可以体现出不一致光源的差异特征

相关系数的高低与一致性的优劣是相同的。与参考光源光强分布的相关系数0.995以上的待筛选光源为高度相关光源

相关系数大于0.99小于0.995的为低度相关光源

相关系数小于0.99的为不合格光源。由于舍弃了传统机械转动方式

该系统提供了一种新的快速的测量方案

基本满足光源空间光分布特性在线测量与质量筛选要求。

Abstract

A set of rapid-testing system for intensity spatial distribution characteristics of light-emitting diodes (LEDs) was designed to screen out LEDs with light distribution defects before they leave the factory. This system used optical fibers for collecting light and a contact image sensor for photoelectric conversion. The relationship between sensor output and its corresponding light intensity was established and the intensity distribution properties could be obtained and corrected by comparing with the data of a reference sample. The correlation coefficient was proposed to quantitatively evaluate the difference between tested sample and reference sample. Experimental results indicate that this system can effectively reflect the differences of intensity distributions of light sources. When the correlation coefficient is greater than 0.995

the tested light source can be screened out as a highly correlated one. When the correlation coefficient is less than 0.995 but greater than 0.99

the light source can be screened out as a low correlated one. When the correlation coefficient is less than 0.99

the light source can be screened out as a non-conformity one and should be eliminated. As the system gives up the traditional mechanical transmission

it provides a new measurement method with a high speed

and meets the demands of on-line intensity distribution testing very well.

关键词

Keywords

references

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