New LED light source system with uniform illumination for line-scan CCD imaging systems  

作　　者：张莲莲 黄庆梅 李心怡 胡维贵 刘南渤 陆爱民 

机构地区：[1]National Laboratory of Color Science and Engineering,School of Optoelectronics,Beijing Institute of Technology,Beijing 100081,China [2]SINOMV Technology Co.Ltd,Beijing 100091,China

出　　处：《Journal of Beijing Institute of Technology》2016年第4期571-574,共4页北京理工大学学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(61078048)

摘　　要：A system with uniform light reflection in the inner surface within a horizontal 2/3 cylindrical structure for line-scan CCD of the print testing was designed. The design was based on diffuse reflection uniformity of the integrating sphere and requirement of the strip uniform illumination region. This system was called dome light. White light LED array light sources were used for uniform illumi- nation. The LEDs were filtrated to composite array light source based on coefficient of variation of a single LED. The standard white board and SG color checkers were used in the line-scan CCD imaging experiments under the dome light and ordinary illumination light source. The average color difference （AE） of SG color checkers in CIELAB space was 2. 091 under the dome light and 2. 286 under ordinary illumination light source respectively. Experimental results indicate that the dome light can satisfy illumination uniformity and color rendering consistency for line-scan CCD and provide a standard light source for uniform calibration of different cameras.A system with uniform light reflection in the inner surface within a horizontal 2/3 cylindrical structure for line-scan CCD of the print testing was designed. The design was based on diffuse reflection uniformity of the integrating sphere and requirement of the strip uniform illumination region. This system was called dome light. White light LED array light sources were used for uniform illumi- nation. The LEDs were filtrated to composite array light source based on coefficient of variation of a single LED. The standard white board and SG color checkers were used in the line-scan CCD imaging experiments under the dome light and ordinary illumination light source. The average color difference （AE） of SG color checkers in CIELAB space was 2. 091 under the dome light and 2. 286 under ordinary illumination light source respectively. Experimental results indicate that the dome light can satisfy illumination uniformity and color rendering consistency for line-scan CCD and provide a standard light source for uniform calibration of different cameras.

关 键 词：line-scan CCD uniform illumination white light LED coefficient of variation arraylight source color difference 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TM923.34[自动化与计算机技术—计算机科学与技术]