摘要
一次成像的简化式红外光学系统冷屏与出瞳不能匹配,致使系统受到杂散光干扰。在此情况下,对冷屏的开孔形状进行合理优化设计对杂散光的抑制十分必要。利用数学中的最优化计算来解决冷屏形状的优化问题,建立了优化变量和优化目标函数的数学模型,提出了全局优化和局部优化相结合的方法,分别用区间穷举法和阻尼最小二乘法完成,以得到较优的冷屏开孔形状。利用本方法,对一个现有的简化式热像光学系统设计了冷屏开孔形状,解决了该系统中由冷屏与出瞳不匹配造成的杂散光干扰的问题,从而验证了提出的冷屏优化设计方法的正确性与实用性。
The cold shield mismatches exit pupil in simple imaging infrared optical systems, causing the interference in the systems. For those systems, optimization design for the shapes of cold shield is necessary to suppress the stray light. A mathematical method using optimization calculation to design the shapes of cold shield is proposed. The mathematical models of optimization variables and objective functions are established, then global optimization by the interval exhaustive method and local optimization by the damped least squares method are combined to obtain a proper cold shield shape. The method built in the article is used to design the shape of cold shield for an existing thermal imaging optical system. The problems of stray light in the system caused by the mismatch of cold shield and exit pupil are solved, and thus the method built to optimization design for the shapes of cold shield is proved to be positive and applicable.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2016年第1期104-111,共8页
Acta Optica Sinica
关键词
光学设计
红外光学
杂散光
优化设计
冷屏
目标函数
optical design
infrared optics
stray light
optimization design
cold shield
objective functions
