长波红外连续变焦光学系统设计:长波红外连续变焦光学系统设计
Design of a Long-Wave Infrared Continuous Zooming Optical System
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作 者:王合龙[1,2] 陈建发[1] 李淑忠[1]
机构地区:[1]中国航空工业集团公司洛阳电光设备研究所,河南洛阳471000 [2]光电控制技术重点实验室,河南洛阳471000
出 处:《电光与控制》 2014年第21卷第12期 1-4页,共4页
Electronics Optics & Control
摘 要:针对制冷型320×256焦平面阵列探测器,设计了一套用于机载光电探测设备的长波连续变焦红外光学系统。光学系统采用锗和硒化锌两种普通红外光学材料,通过引入非球面和衍射面很好地校正了系统的色差和轴外像差,使得系统整个连续变焦过程中16 lp/mm 处 MTF 均大于0.35。系统仅由6片镜子构成,工作波段为7.7~10.3μm,F 数为3,满足100%冷光阑效率,实现了50~400 mm 的连续变焦,变焦曲线光滑。像质评价结果表明该系统成像质量良好,结构紧凑。
A set of long-wave infrared continuous zooming optical system was designed for airborne photoelectric detection equipment,based on long wavelength 320 ×256 element cooled thermal IR Focal Plane Array( FPA) detector.The optical system is made of two kinds of common infrared materials,Ge and ZnSe.By introducing a diffractive surface and three aspheric surfaces,the chromatic aberration and the off-axis aberration are well corrected, and the Modulation Transfer Function (MTF) of the system is kept above 0.35 for all continuous zooming ratios at the spatial frequency of 16 lp/mm.The system is consisted of 6 lenses,has a F/number of 3,working wave band of 7.7 -10.3 μm,and cold shield efficiency of 100%.Continuous zooming from 50 mm to 400 mm is realized with smooth zoom paths.The results show that the compact structured continuous zooming system has pretty good imaging quality.
关键词:光学设计 红外光学 连续变焦
optical design ;infrared optics ;continuous zooming ;