【摘要】 建立了空间可见光相机对空探测的物理模型.利用辐射传输的基本原理,分析了面源目标亮度和背景辐射亮度与探测相角、背景光入射角和相机数值孔径之间的关系.给出点目标探测时主要噪音源的计算方法,从而推导出可见光相机接收到的以电子数为基本单位的信噪比表达式.通过数值模拟给出各种因素对信噪比的影响,得到了较高信噪比的可行方法.更多还原

【Abstract】 Mathematics model of un-illuminant space targets is set up.Based on the basic theory of radiation transmission,the relationships between target lightness and the detect angle and parameters of the camera are analyzed,and the relationships between background lightness and the incidence angle and parameters of the camera are analyzed.The calculation method for the main noise by the detecting of point targets is given.The general expression of SNR was deduced.The feasible means to get the high SNR is put forward by analyzing the effect of all the factors on SNR.更多还原