中波红外两档变焦光学系统  

Mid-wavelength infrared dual field-of-view optical system

作　　者：郜洪云[1] 熊涛[2] 

机构地区：[1]武汉理工大学,湖北武汉430070 [2]华中光电技术研究所,湖北武汉430074

出　　处：《光学精密工程》2008年第10期1891-1894,共4页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.60471024)

摘　　要：报道了一种适用于320×240制冷型探测器的中波红外两档变焦光学系统，该系统采用二次成像、前组透镜轴向移动变焦的光学结构。利用变焦原理和光学设计软件分析了系统的像质。设计结果表明，该系统可以实现焦距为180mm／60mm的两档变焦，工作波段为3～5μm，F数为1．96，满足100％冷光阑效率，在空间频率16lp／mm处的光学传递函数值〉0．6。应用结果表明，该系统结构简单，易于装调，像质好。A middle infrared dual field of-view optical system with staring focal plane array and re-imaging optics is presented for cool 320 ×240 detector. Based on zoom system principle and optical design software, the Modulation Transfer Function （MTF） curve, spot diagram, and the Root Mean Square value （RMS） of spot diameter are investigated. The design results show that this system can realize 180 mm/60 mm dual field-of-view at the spectrum region of 3-5μm and the F number of 1.96,which can obtain the cold shield efficiency of 100% and the MTF more than 0.6 at the spatial frequency of 16 lp/mm. The optical system is analyzed in two modes of Narrow Field of View （NFOV） and Wide Field of View （WFOV）,results show that it has the advantages of simple structure, high image quality, low price and easy to adjustment.

关 键 词：红外光学系统 两档变焦 光学设计 

分 类 号：TN216[电子电信—物理电子学]