彩色CCD摄像机三基色代表波长的试验研究

Experimental research of representative wavelengths of tricolor for color CCD camera

为了提高基于彩色电荷耦合器件三基色的温度图像检测方法的准确性,提出了一种电荷耦合器件三基色代表波长的试验测定方法,通过加装滤色片获得不同波长下黑体炉的单色图像,根据对图像中的三基色值和相应单色辐射强度的分析来测定其代表波长,对3种不同型号的电荷耦合器件试验检测,结果表明代表波长只与电荷耦合器件成像技术有关,不会随温度、电荷耦合器件设置改变而变化.根据测定的波长和国际照明委员会指定的波长,对煤粉燃烧火焰的温度计算表明两者相差6.34%.

To improve the accuracy of temperature image detecting method based on the tricolor of color charge coupled device （CCD） camera, an experimental method was proposed to determine the tricolor representative wavelengths of charge coupled device. The wavelengths were detected by analyzing the tricolor and monochromatic radiation intensity of blackbody monochromatic images of different wavelength. The monochromatic images were obtained by adding the color filter. The results from three different models of charge coupled device indicate that the representative wavelengths are related to imaging technique and will not change with temperature and charge coupled device settings. The difference of temperatures between measured wavelengths and Committee of International Illumination ones is 6.34 %.