摘要
研究了折射 /衍射光学元件的温度效应及红外系统的设计理论及具体实例 ,给出了在红外 3.2～4 .5 μm波段 ,5°视场范围 ,冷光栏效率 10 0 % ,在 - 4 0～ 80℃温度变化范围情况下的红外混合减热差系统的设计结果。结果表明 ,使用折射 /衍射光学系统的减热差设计方案 ,可令相应的传统光学系统减少一片元件 ,并且节省了昂贵的硒化锌红外材料。不仅能在较大视场内得到接近衍射极限的成像质量 ,较宽的温度工作范围 ,而且结构简单 ,体积小 ,重量轻。
Based on the investigation on the thermal properties of the diffractive lens, the paper introduces a method and some examples for designing the athermal diffractive/refractive optical system in the infrared region. An optical system at 3.2～4.5μm with 100% cold shield efficiency, 5_degree field of view was designed, associated with high optical quality at the temperature ranging from -40℃ to 80℃. With this designing scheme, there is decrease in the number of optical components for a conventional optical system by one piece, and the weight can be reduced by 1/4, and expensive Se-Zn IR material is saved. Furthermore, the image quality approaching the diffraction limit in a larger spatial field view and wider thermal range can be obtained.
出处
《光学精密工程》
EI
CAS
CSCD
2002年第2期121-125,共5页
Optics and Precision Engineering
基金
中国科学院长春光机与物理研究所应用光学国家重点实验室基金资助项目
