像方扫描机制的红外成像制导光学系统设计

摘要

提出了一种新型的像方扫描机制的红外成像制导光学系统设计构型。该扫描系统体积小、结构简单，具有大视场搜索和小视场分辨的特点。设计了一个红外光学系统实例，工作波段为3．7～4．8μm，焦距为80 mm，扫描视场为±15°，瞬时视场为5°。系统全视场MTF在17 lp/mm处均大于0．5，点斑均方根直径小于30μm，满足光学系统的成像要求。%A new kind of infrared optical system for imaging guidance of image space scanning is described .The scanning system has the advantages of small size and simple structure,wide FOV for searching and narrow FOV for distinguishing .An infrared optical system was designed .The system has an operating waveband of 3.7~4.8 μm,an effective focal length of 80 mm,the total scanning FOV of ±15° and instantaneous FOV of 5°.The MTF is higher than 0.5 at the spatial frequency of 17 lp/mm across the full FOV.The RMS spot diameter is less than 30 μm.The specifications can meet the requirements of the optical systems .