白光辐照多光谱CCD的干扰效应研究

为了研究多光谱CCD相机的干扰效果，分别采用氙灯(白光)、671nm激光、473nm激光和532nm激光对多光谱CCD相机进行干扰实验，提取了红、绿、蓝三通道下的干扰图，并对干扰效果进行了分析，最后利用光生载流子的扩散模型对白光辐照多光谱CCD进行仿真。结果表明, 白光辐照多光谱CCD相机时，红、绿、蓝三通道会同时被干扰，干扰效果明显优于单波长的干扰效果；当白光的入射功率为10.5μW时，白光辐照多光谱CCD的饱和像元数为2382pixel，随着入射功率的增大，多光谱CCD的饱和像元数也逐渐增加，当白光的入射功率为980μW时，白光辐照多光谱CCD的饱和像元数稳定在320078pixel；多光谱CCD对各个波长连续激光干扰响应程度从大到小依次为白光、532nm、473nm、671nm；仿真所得干扰图以及饱和像元数随激光功率的变化关系曲线与实验结果基本相符。该结果有助于多光谱CCD相机干扰机理的深入研究。

Study on the interference effect of white light irradiation multispectral CCD

In order to study the interference effect of multispectral CCD camera, both xenon lamp (white light) and laser with wavelength of 671nm, 473nm, and 532nm separatelywere used to interfere the multispectral CCD camera.The interference map of red, green and blue channels was extracted, and the interference effect was analyzed. Finally, the white light irradiation multispectral CCD was simulated by using the diffusion model of photo generated carriers. The results show that red, green, and blue channels will be interfered at the same time when white light irradiates the multispectral CCD camera, and the interference effect is obviously better than that of single wavelength.When the incident power of white light is 10.5μW, the saturation pixel number of white light irradiated multispectral CCD is 2382pixel.With the increase of incident power, the number of saturated pixels of multispectral CCD increases gradually.When the incident power of white light is 980μW, the saturation pixel number of white light irradiated multispectral CCD is stable at 320078pixel. The order of the response of multispectral CCD tosuccessive laser is white light, 532nm, 473nm, and 671nm.The simulated interference figure and the curve of the number of saturated pixels changing with the laser power are basically consistent with the experiment.The results are helpful to further study the interference mechanism of multispectral CCD camera.