【摘要】 建立了基于焦平面探测器的红外成像系统成像的空间域和频率域模型；并分析指出，由于背景辐射的存在和红外探测器明显的响应非均匀性，只有系统经过良好的辐射校正，方能使其成像过程符合线性和空间不变性条件，使得相机可以采用传递函数来评价其几何成像性能。提出了针对基于焦平面探测器的红外成像系统的传函测试方法，能够有效地处理背景辐射的影响而且不受系统不均匀性的影响，试验和应用实践显示了该方法的有效性。更多还原

【Abstract】 Imaging Model in space domain and frequency domain of an infrared camera with focal plane detector is established. It shows that because of the existence of back ground radiance and non-uniformity the geometrical performance of an infrared camera can be evaluated by MTF only when the camera is well-corrected and the linearity and space invariance condition is satisfied. An MTF measurement method of an infrared camera using focal plane detector is given. This method does not depend on the well correction of the camera and can avoid the deviation from the background radiance.更多还原