拼接式光学窗口对光学系统影响的分析方法

高速飞行器采用拼接式光学窗口可以减小风阻和雷达波反射，但是会引起入射波前在窗口处被各个拼接玻璃分割，可能会导致光学系统调制传递函数(MTF)降质以及点扩展函数(PSF)的下降和劈裂，严重的情况下会影响系统的分辨率。因此，分析拼接式光学窗口对光学系统的影响对设计采用拼接窗口的光学系统有着重要参考价值。利用Zemax 软件构建拼接窗口模型，简化拼接窗口分析过程，得出不同情况下拼接窗口波前分割后的MTF 和PSF，结果表明，当被分割的入射光产生特定的光程差时会使MTF和PSF发生严重下降和劈裂，PSF发生严重劈裂的系统会使光学系统成像质量下降。拼接窗口参数的合理选择可以降低这种影响。

Abstract

High-speed aircrafts which use splicing optical windows can reduce the drag and radar reflectivity. But they will cause the incident wave at the front of the various window glass splited, and may cause the degradation of the optical system modulation transfer function (MTF) and the decline and splitting of the point spread function (PSF). In severe cases it will affect the resolution of the system. Therefore, analysis of the effect of stitched windows on the optical systems has an important reference value to the optical system design using stitched windows. Use Zemax software to build stitched window model, we simplify the process of the analysis. The results show that when the incident light is divided to produce a specific optical path difference, the MTF and PSF will decline and split. The serious split of the PSF will decrease the image quality of the optical system. Reasonable choice to the stitched window parameter can mitigate this effect.

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邢振冲, 张葆, 洪永丰. 拼接式光学窗口对光学系统影响的分析方法[J]. 光学学报, 2015, 35(10): 1022005. Xing Zhenchong, Zhang Bao, Hong Yongfeng. Analysis Method of the Effect of Stitched Windows on the Optical Systems[J]. Acta Optica Sinica, 2015, 35(10): 1022005.

拼接式光学窗口对光学系统影响的分析方法

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