气动环境下窗口光传输的分析方法

在气动环境下入射到导弹红外侧窗的波面会因窗口变形导致出射后的等光程波面偏离了理想波面，波面发生畸变，从而使通过窗口的目标光线产生偏移、模糊等，成像质量下降，影响制导精度。为提高制导精度，通过折射率不均匀分布的光学窗口中光线追迹程序的编制，利用所得到的光程差来构建光波通过窗口后的畸变波前图，进而计算窗口的各项光学评价函数，并与仿真结果比较得出理论方法的可行性与可靠性。

The Analytical Method of Optical Transmission in Aero Circumstance Window

Under the aerodynamic circumstance when the incoming wave meets the distorted infrared window of the guide missle, the aplanatic emergent wave after the window will deviate from the real wave front because of the change of the window surface and the gradient index of the optical window. Thus the object ray transmiting through the window will distorts and generates bore-sight error. To increase the accuracy of guidance, the ray-tracing program cross the distorted and non-uniform index window is programmed. At the same time, the distorted wave front chart and the optical evaluation function are obtained. Comparing with the experimental result, the feasibility and credibility of the emulation method are verified.