宽视场高分辨率闭路监控系统监控镜头设计  

Design of CCTV lens with wide FOV and high resolution

作　　者：赵英明[1] 杨春平[1] 杨若夫[1] 段逢源 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《应用光学》2016年第2期168-171,共4页Journal of Applied Optics

基　　金：国家自然科学基金(61308062)

摘　　要：为了满足新形势下闭路监控系统(CCTV)对拍摄视场和高清分辨率的要求,设计了一款复杂化的反摄远型全球面结构的CCTV镜头。该镜头的全视场为80°,F#为3,焦距为5mm,光谱范围为486nm^656nm。采用像元尺寸为7.5μm×7.5μm,1.27cm(1/2英寸)的CCD成像。该镜头在奈奎斯特频率67lp/mm处,全视场MTF接近0.65;在1/2奈奎斯特频率处调制传递函数(MTF)大于0.85;在220lp/mm处,全视场MTF大于0.3,已经接近衍射极限。镜头像面波前PV值为0.077 9λ,RMS为0.015 9λ,达到了瑞利判据的要求。设计评价结果表明,该镜头像差校正满足CCTV监控镜头的成像质量要求。A close circuit television（CCTV）lens was designed with a complicated reverse telephoto configuration to meet the requirements of wide field of view（FOV）and high resolution which was applied to monitor system.The FOV of the designed lens is 80°,the Fnumber is 3,the focal length is 5mm,and the spectral range is from 486 nm to 656 nm.A 1/2inch（1.27cm）CCD was adopted with 7.5μm×7.5μm pixel size.The modulation transfer function（MTF）of full FOV is more than 0.65 at 67lp/mm Nyquist frequency and more than 0.85at1/2Nyquist frequency,and the MTF value of FOV is more than 0.3at 220lp/mm,approaching to the diffraction limit.The wavefront map shows that the peak-valley（PV）value is 0.077 9λand root-mean-suare（RMS）value is 0.015 9λ,which can meet the Rayleigh criterion.The evaluation of optical system shows that the lens has low aberration and high image quality,satisfying the requirement of CCTV monitor system with wide FOV and high resolution.

关 键 词：应用光学 CCTV镜头 光学设计 宽视场 高分辨率 

分 类 号：TN202[电子电信—物理电子学] O439[机械工程—光学工程]