摘要
论述了利用衍射元件实现光学系统消热差的原理和设计方法。利用衍射光学元件特殊的消热差和消色差特性，设计了8～12μm波段内，焦距为90mm，F／#为1.5，视场角为±2°，在-40-80℃温度范围内既消热差又消色差的折／衍混合红外光学系统，并给出了评价结果。该系统在工作温度范围内，成像质量接近衍射极限，适用于非制冷红外焦平面阵列热像仪上。
The principle and design method of employing diffractive optical element to athermalize and achromatize on optical system are presented. Based on the special athermal propertise and achromatize characteristics of the diffractive optical elements,an hybrid optical system at 8- 12 μm waveband and the temprature range of --40-80℃ is designed in this paper,and the evolution of the system is given. The system parameters are focal length 90 mm,F/# 1.5, field of view ±2°. Design result showed that image quality is close to diffractive limitation. The lens is compatible with uncooled IR facal plate array thermal imager.
出处
《光电子技术》
CAS
2008年第2期120-122,138,共4页
Optoelectronic Technology
关键词
红外光学系统
衍射光学
消热差
光学设计
infrared optical system
diffractive optical
athermalisation
optical design
