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激光干扰CCD时光的传输过程的研究,对激光干扰CCD干扰图像的仿真、干扰效果的分析等具有重要意义。理论分析了考虑探测器表面反射时的激光干扰CCD时光的传输过程。由于透镜的作用,首先激光会聚焦到探测器表面。聚焦光会被探测器表面反射。由于CCD探测面是网格状分布,反射光的分布会被这一结构调制。反射后的光经过透镜,会成像在某些平面上。根据透镜中光的传输计算发现,因为透镜的傅里叶变换作用,光阑平面上会出现周期性的亮点分布。由于光阑平面上不透光的部分的反射,亮点会再次成像在探测器表面上。仿真了亮点被光阑平面上不透光部分的反射后,经过光阑后面的透镜又成像在探测器上的过程,得到了规则的周期性的亮点分布。实验结果验证了这一理论。
The research on the transmission process of laser jamming CCD time is of great significance to the simulation of laser jamming CCD jamming image and the analysis of jamming effect. The time history of laser interfering CCD considering the surface reflection of the detector is theoretically analyzed. Due to the action of the lens, first the laser will focus on the detector surface. The focused light is reflected by the detector surface. Since the CCD detection surface is a grid-like distribution, the distribution of the reflected light is modulated by this structure. The reflected light passes through the lens and will be imaged on some planes. According to the calculation of the light transmission in the lens, it is found that the periodic bright spot distribution appears on the diaphragm plane due to the Fourier transform of the lens. Due to the reflection of the opaque part of the diaphragm plane, the bright spot will again be imaged on the detector surface. After the reflection of the bright spot by the opaque part of the aperture plane and the imaging of the lens behind the aperture again on the detector, a regularly periodic bright spot distribution is obtained. The experimental results verify this theory.