发光学报, 2011, 32 (1): 64, 网络出版: 2011-01-26
彩色视觉测量中的LED照明系统设计
Design of The LED Light Source for Color Vision Measurement
摘要
设计并制作了一套基于发光二极管(LED)的具有多颜色特征的光源系统,分析了光源工作原理,进行了光学结构设计。应用MAX16807芯片和脉宽调制(PWM)技术设计专用驱动电路,实现了LED的恒流驱动和亮度数字调制。实验证明,该光源预热后的照度、主波长和色品坐标稳定,辐照均匀度达到90%以上,可以满足彩色视觉测量的需要并取得良好的图像效果。
Abstract
A LED-based illumination system with unique feature of instant color variability was fabricated after analyzing the working principle and designing the optical structure of the system. The driving circuits realized constant-current drive and PWM dimming by using IC MAX16807. The experimental results show that the irradiance, the dominant wavelength and the chromaticity coordinate are stable; the uniformity of irradiance distribution is above 90%. Finally, a good image result was obtained and this illumination system was proved to be suitable for color vision measurement.
贾果欣, 曲兴华, 梁海昱, 祝振敏. 彩色视觉测量中的LED照明系统设计[J]. 发光学报, 2011, 32(1): 64. JIA Guo-xin, QU Xing-hua, LIANG Hai-yu, ZHU Zhen-min. Design of The LED Light Source for Color Vision Measurement[J]. Chinese Journal of Luminescence, 2011, 32(1): 64.