摘要
针对制冷型320pixel×240pixel凝视焦平面阵列探测器,设计了一个25倍中红外连续变焦光学系统。该系统由变焦系统和二次成像系统构成。变焦系统由两个子变焦系统串联而成,可以实现高变焦比;二次成像系统的作用是压缩物镜口径和实现冷光阑效率的要求。该中波红外连续变焦系统光学系统的工作波段位于3.7～4.8μm,可以实现12～300mm连续变焦,F数达到2.5,满足100%冷光阑效率的要求。该系统具有变焦比大、相对孔径大、变焦行程短和变焦轨迹平滑等优点。
For 320 pixel×240 pixel cooled staring focal plane array detector,a mid-infrared zoom optical system with ratio of 25 is designed.The system consists of a zoom system and a re-imaging system.The zoom system consists of two small zoom lenses,which can realize large zoom ratio;the re-imaging system can satisfy requirement of the cold shield efficiency,and the diameter of lens can be reduced because of it.The mid-infrared zoom optical system works in the range of 3.7～4.8 μm,it can realize 12～300 mm continuous zoom and satisfy requirement of 100% cold shield efficiency;F number of the system is 2.5.The zoom system has advantages such as a large zoom ratio,a large aperture,and short and smooth zoom paths.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2012年第4期214-218,共5页
Acta Optica Sinica
基金
国家自然科学基金(60977001)资助课题
关键词
光学设计
连续变焦
中红外
高变焦比
optical design
continuous zoom
mid-infrared
large zoom ratio
