基于谐衍射特性的红外双波段光学系统设计  

Design of a dual-band IR optic system based on harmonic diffraction

作　　者：刘琳[1] 贺谊亮[1] 张兴德[1] 李荣刚[1] 

机构地区：[1]华北光电技术研究所,北京100015

出　　处：《激光与红外》2012年第1期85-88,共4页Laser & Infrared

摘　　要：基于谐衍射光学元件的成像理论,将谐衍射透镜应用在传统红外单波段系统里,设计得到工作波段处于4.4～5.4μm和7.8～8.8μm的红外双波段光学系统。分析了谐衍射光学元件的特性,计算了光学系统的结构参数,并利用软件的多重结构进行了优化。设计结果表明,系统的光学传递函数在两个波段范围内,20 lp/mm时的归一化值均大于0.5,具有良好的成像质量。为红外光学系统的设计提供了一种全新器件。A dual-band IR optic system with bands of 4.4~5.4 μm and 7.8~8.8 μm is designed on the basis of the special properties of Harmonic Diffractive Element（HDE）.The HDE element characteristic is analyzed and the structural parameters of the system are calculated.The optimization using multi-configuration in the software has been simultaneously accomplished.The results show that the MTF values are all over 0.5 at the resolution of 20lp/ mm,which displays a good optical performance.The HDE offers a new component for optical designs.

关 键 词：谐衍射元件 双波段 消色差 

分 类 号：TN214[电子电信—物理电子学]