基于固定校正元件的凝视型共形光学系统设计  

Design of Staring Conformal Optical System Based on Fixed Corrector

作　　者：张羽[1] 崔庆丰[1] 朱浩[1] 

机构地区：[1]长春理工大学光电工程学院,吉林长春130022

出　　处：《光学学报》2015年第1期346-353,共8页Acta Optica Sinica

基　　金：国家重大科技专项高分专项(51-H34D01-8358-13/16)

摘　　要：为提高凝视型共形光学系统的成像质量,提出了采用共形整流罩内表面设计与Zernike Fringe Sag面固定校正板设计相结合的固定校正方法。根据建立的入射光线与出射光线方向的偏离角与整流罩参数的关系,设计整流罩内表面参数,减小共形整流罩引入的部分像差。在此基础上,利用Zernike Fringe多项式各项与像差的对应关系,构建Zernike Fringe Sag面固定校正板。基于该设计方法设计了一个凝视型共形光学系统,其F数为1,焦距f为30 mm,观察视场为±35°。分析了校正前后系统的像差特性。设计结果表明,该方法有效地减小了共形光学系统存在的主要像差,整个观察视场范围内调制传递函数(MTF)曲线在17 lp/mm处均达到0.748以上,成像质量良好。In order to enhance the imaging quality of the staring conformal optical system, a static correction method which combines the optimized inner surface of the conformal dome and fixed correctors with Zernike Fringe Sag surfaces is proposed. On the base of the relationship between the parameters of dome and the shift in the direction of a ray as it passes through a conformal dome, the parameters of the inner surface of the dome are projected, which reduce some aberrations of the conformal optical system. Then, the correspondence between the Zernike Fringe polynomial terms and aberrations is used to build the fixed corrector with Zernike Fringe surfaces. Based on this method, a staring conformal optical system is designed, whose F is 1, focal length is 30 mm, the field of view is ±35° . The characters of the aberrations are analyzed before and after correction. The result shows that this method has a good effect on correcting the main aberrations, and the modulation transfer function （MTF） of optical system is higher than 0.748 at the spatial frequency of 17 lp/mm across the entire field of view. The imaging quality is favorable.

关 键 词：光学设计 椭球形整流罩 内表面 泽尼克多项式 凝视成像系统 像差校正 

分 类 号：O435[机械工程—光学工程]