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

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。

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. 更多