一种8倍可见光变焦光学系统设计  

Design of an 8 Times Ratio Visible Zoom Optical System

作　　者：范哲源[1] 曹剑中[1] 屈恩世[1] 杨洪涛[1] 

机构地区：[1]中国科学院西安光学精密机械研究所飞行器光学成像与测量技术研究室,西安710119

出　　处：《光子学报》2010年第S1期101-104,共4页Acta Photonica Sinica

摘　　要：本文设计了一种焦距为6.5～52mm的可见光变焦距光学系统,视场角为6.6°～52°.设计中选取5个焦距位置进行了计算,采用负组变倍和正组补偿方式,实现连续变焦.设计结果表明其成像质量良好,其中75lp/mm处的调制传递函数值均大于0.6,弥散圆直径小于像元尺寸.最后采用插值拟合的方法进行了凸轮曲线的设计,该系统具有长度短,成像质量好,凸轮曲线平滑易于加工,工艺性好等优点.An example of 8× ratio visible zoom system with mechanic compensator was designed.The focal length and angle of vision of the system were 6.5~52 mm and 6.6°~52°,respectively.The modulation transfer function(MTF) is above 0.6 within the whole focal range at spatial frequency of 75 lp/mm,and approaches the diffraction limit.RMS value of spot diameter was investigated.The cam curves after optimization was given.The system has the advantages of simple structure,high image quality,short zoom path and smooth zoom locus etc.

关 键 词：变焦设计 像差 传递函数 凸轮曲线 

分 类 号：TH74[机械工程—光学工程]