CMOS图像传感器校准用可调光源

发布时间：2018-05-19 18:25

本文选题：光学器件 + 校准光源　；参考：《光学学报》2017年03期

【摘要】：为了提高CMOS图像传感器校准光源色温、亮度和色品坐标的准确度和调节精度,同时能够使色品坐标独立可调,提出了一种采用低色温白光LED灯珠、高色温白光LED灯珠加红绿蓝光LED灯珠组合式调光方法的校准光源,并研制了光源控制系统及调光软件。用户通过调光软件输入目标色温值和照度值,光源控制板会根据设定值选择相应的LED灯珠组合并输出对应色温值和照度值的光源。实验结果表明,LED光源实际输出色温和照度值相对于设定值的偏差范围在1%以内。在色温输入值不变的情况下,调节照度值时色温的变化在0.2%以内,色温和照度独立可调。脉冲宽度调制输出频率为21kHz,LED光源在CMOS图像传感器检测下无频闪。色品坐标独立可调,调整精度达到10~(-4)。色温和照度在长时间工作条件下变动范围分别在0.05%以内和0.1%以内,LED光源稳定性良好。
[Abstract]:In order to improve the accuracy and accuracy of color temperature, brightness and coordinate of color products calibrated by CMOS image sensor, and to make the coordinates of color products adjustable independently, a low color temperature white light LED lamp bead is proposed. The calibration light source of high color temperature white LED lamp bead and red green blue LED light ball combined dimming method is developed. The light source control system and dimming software are developed. The user inputs the target color temperature value and illuminance value through dimming software, the light source control board selects the corresponding LED lamp bead combination according to the set value and outputs the light source corresponding color temperature value and illuminance value. The experimental results show that the deviation range between the actual output color temperature and illuminance value of LED light source and the set value is less than 1%. Under the condition that the input value of color temperature is constant, the change of color temperature is within 0.2% when the illuminance value is adjusted, and the color mild illumination can be adjusted independently. The output frequency of pulse width modulation is 21 kHz / h LED light source without stroboscopic under the detection of CMOS image sensor. The coordinates of color products can be adjusted independently. The range of color and illuminance varies within 0.05% and 0.1% respectively under the condition of long working hours, and the stability of LED light source is good.
【作者单位】：上海理工大学出版印刷与艺术设计学院;
【基金】：上海市地方院校能力建设项目(14440502600)
【分类号】：TP212

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