摘要
为了提高大口径离轴反射式光学系统的环境适应性,设计了被动消热差的大口径离轴光学系统。首先通过技术比较,确定了机械被动式的补偿路线。随后通过光学和机械材料的选取、光机结构的优化和补偿结构的计算,利用简单机械结构实现了系统的无热化。最后对系统的设计结果进行了仿真,分析了系统在-40℃、20℃和+55℃的光学传递函数。分析结果表明,利用该方法实现的大口径离轴光学系统完全满足温度补偿的要求,同时具有体积小、重量轻、易于实现且补偿精度高等优点。
In order to improve the environmental adaptability of the large aperture off-axis optical system, a large aper-ture off-axis optical system with passive athermalization was designed. Firstly, the route of mechanical passive compen-sation was determined by technical comparison. Then, through the selection of the optical and mechanical materials,the optimization of the opto-mechanical structure and the calculation of the compensation structure, a simple mechani-cal structure was adopted to realize the athermalization of the system. Finally, the design of the system was simulatedand the MTF of the system at -40 ℃ ,20 ℃ and ＋55 ℃ was analyzed. The results show that the designed large ap-erture off-axis optical system can meet the requirement of temperature compensation, and has the advantages of smallvolume, light weight, easy realization and high compensation precision, and so on.
出处
《激光与红外》
CAS
CSCD
北大核心
2017年第11期1428-1432,共5页
Laser & Infrared
关键词
大口径光学
离轴光学
反射光学系统
被动消热差
large aperture
off-axis optical system
reflect optical system
passive athermalization
