【摘要】 与传统定焦系统相比,红外双焦光学系统具有宽视场搜索目标、窄视场跟踪目标的能力;与连续变焦系统相比,红外双焦光学系统机械结构简单,装调容易等优点成为近年来研究的热点。介绍了一种用于324×256中波致冷红外探测器双焦10×光学系统设计结果。系统焦距24～240 mm,F#2,采用切入式变焦方式,短焦宽视场的全视场角达到28.7°;长焦窄视场的全视场角仅为2.9°。二次成像技术的应用,可以有效的减小轴向尺寸。Code V光学设计软件进行优化得到在空间频率17 lp/mm处,宽视场和窄视场的MTF均大于0.5。更多还原

【Abstract】 Compared with single-focal length optical system,infrared dual-zoom optical system has capabilities such as searching targets in the wide field of view and tracking targets in the narrow field of view.Compared with the zoom system,infrared dual-zoom optical system has advantages,such as simple structure,easy fixing and so on,and becomes the hotspot of researches lately.Ten-times dual-zoom optical system for 324×256 midwave cooled detector is introduced in the paper.The focal length is 24 mm-240 mm,F#2.The manner of zoom was accomplished by inserting lenses.In the wide angle mode,the field of view was 28.7.In the narrow angle mode,the field of view was 2.9.The technology of re-imaging was used to reduce the axes size of optical system.The system is optimized with coed V optical design software and the MTF greater than 0.5 at WFOV and NFOV in the spatial frequency 17 lp/mm.更多还原