探测器像元尺寸对航空光电系统成像性能影响分析

针对航空光电系统成像性能要求，从探测器像元尺寸出发，研究了探测器像元尺寸对探测器动态范围、信噪比、调制传递函数等性能参数的影响，并分析了探测器像元尺寸对光电系统分辨率、信噪比、探测识别作用距离等总体性能参数的影响，最后列举了国外典型航空光电系统参数及其选用的探测器参数。通过分析探测器性能参数与系统总体性能参数之间的关系，给出探测器像元尺寸选型及航空光电系统Fλ/d典型值的建议，即一般情况下航空光电系统为了获得远距离高像质图像，优先选用大像元探测器，并综合权衡探测器像元尺寸与系统Fλ/d之间的关系，将Fλ/d控制在2以内。

Influence of detector pixel size on imaging performance of airborne optoelectronic system

According to the imaging performance requirements of airborne optoelectronic system, starting from the detector pixel size, the influence of detector pixel size on detector performance parameters such as detector dynamic range, signal-to-noise ratio and modulation transfer function was researched. Further the influence of detector pixel size on overall performance parameters of optoelectronic system, such as resolution, signal-to-noise ratio, detection and recognition operating range was analyzed. Finally, the parameters of foreign typical airborne optoelectronic system and the selected detector parameters were listed. Through the analysis of relationship between performance parameters of the detector and overall performance parameters of the system, the suggestions on the selection of the detector pixel size and the typical value Fλ/d of the airborne optoelectronic system were obtained, that is, generally, in order to obtain the long-distance high image quality images, the airborne optoelectronic system gave priority to the large pixel detector, and comprehensively weighed the relationship between detector pixel size and system Fλ/d, so as to control the Fλ/d within 2.