变焦距共形红外光学系统的设计研究

摘要

提出一种双视场共形红外光学系统的设计方法,该光学系统采用二次成像的光学结构形式与轴向移动式的视场变倍方式,在共形窗口的基础上利用变焦原理完成系统的设计.系统主要光学参数F/#为4,变倍比为3∶1,工作波长为3.7～4.8μm,采用椭球型窗口.设计结果表明,系统成像质量良好,并满足100％冷光阑效应.%A dual-FOV conformal optical system is introduced. Zoom theory is applied in this system with a conformal window. Secondary imaging optics configuration and axial motion are adopted in this optical system. The conformal optical system is developed based on a ellipsoid surface window, whose F/ # is 4, zoom ratio is 3 :1, and operating wavelength is 3.7 ～4. 8 μm. The high image quality and 100% cold stop efficiency is achieved.