拼接光窗在气动保形、电磁隐身、大尺寸等方面均具有较好的性能，但由于子光窗间状态不一致，导致各区域入射波前分离并产生附加光程差，系统点扩散函数(PSF)随之退化，从而使得成像图像模糊，因此,分析拼接光窗对成像质量的影响对于高性能机载光电探测系统的开发十分必要。通过图像数值仿真，对拼接光窗影响光学成像的因素逐一进行分析并确定图像特征和形成原因。同时给出了一个设计实例，对合理确定子光窗加工精度和面形精度的方法进行说明。

The splicing light window has good performance in terms of pneumatic conformality, electromagnetic stealth and large size. However, due to the inconsistent state between the sub-optical windows, the incident wavefronts from the different areas are separated and an additional optical path difference is introduced. Thereby the system Point Spread Function (PSF) is degraded, and the obtained image is blurred. Therefore, analyzing the effect of splicing light window on imaging quality is necessary for the development of high-performance airborne photodetection system. Through the numerical simulation of the image , the factors affecting the optical imaging by the splicing light window are analyzed one by one and the image features and formation causes are determined. At the same time, a design example is given to illustrate the method of reasonably determining the processing precision and surface accuracy of the sub-window.