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.
出处
《电光与控制》
北大核心
2014年第12期1-4,共4页
Electronics Optics & Control
关键词
光学设计
红外光学
连续变焦
optical design
infrared optics
continuous zooming
