光学精密工程2017，Vol.25Issue(7)：1757-1763,7.DOI:10.3788/OPE.20172507.1757
分孔径三视场中波红外光学系统
MWIR optical system with dual-optical aperture and three fields of view
摘要
Abstract
A MWIR optical system with three fields of view as well as dual-optical aperture and large zoom ratio was designed in order to overcome the conflict between long focal length and large field of view of single optical channel.The system was equipped with dual-optical aperture,which was composed of optical channels with a narrow field of view and a middle-wide field of view.The switch of the two channels was realized by cutting in and out a reflector inclined at 45° respectively.Using six lenses,the narrow field of view optical system was a re-imaging optical system with high transmission.The middle-wide field of view optical system was a thrice imaging optical system.The two channels share one mirror and a relay group,thus realizing common exit pupil and dual entrance pupils——dual-optical aperture.The long focal length of the narrow field of view is 1 120 mm,the short focal length of the wide field of view is 22.58 mm,and the zoom ratio reaches 53×.The threedimensional dimensions of the optical system is effectively controlled within 270 mm × 217 mm × 258mm by thrice folding the narrow field of view optical system and once folding the middle-wide field of view optical system.The system is compact and realizes MWIR optical system with three fields of view as well as long focal length and large field of view.The design and experiment results indicate that image quality of the optical system is perfect,which meets the requirements of thermal infrared imagers.关键词
中波红外光学系统/分孔径/共出瞳分入瞳/长焦距/立体折叠/三视场Key words
MWIR optical system/dual-optical aperture/common exit pupil and dual entrance pupil/long focal-length/three-dimensional folding/three fields of view分类
信息技术与安全科学引用本文复制引用
何红星..分孔径三视场中波红外光学系统[J].光学精密工程,2017,25(7):1757-1763,7.基金项目
预研项目支持(No.LZ0102040101) （No.LZ0102040101）
