小畸变针孔广角镜头的设计  

Design of Pinhole Wide-angle Lens with Small Distortion

作　　者：景桂芬 向阳[1] 冯大伟 李琦[1] 李京蔓 JING Guifen;XIANG Yang;FENG Dawei;LI Qi;LI Jingman(School of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun,130022)

机构地区：[1]长春理工大学光电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2018年第5期12-15,共4页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省科技厅项目(20160203008YY)

摘　　要：针孔摄像机广泛应用于图像监视领域,随着镜头视场角的增大,成像范围增大,图像会产生形变,畸变难以校正。为了控制摄像机的系统畸变并且提高其成像质量,提出了基本结构采取物镜后接转像系统的光学系统,其工作距离为10米,全视场角为100°,相对孔径为1/2,入瞳在光学系统最外侧,焦距为1.67mm,接收器为1/4英寸CCD。优化后全视场畸变小于2%,在200lp/mm空间频率处的MTF值都大于0.3。系统很好的校正了球差、色差和场曲。实现了大视场小畸变的光学特性,适合隐蔽监控场合。Pinhole cameras are widely used in the field of image surveillance.With the increase of the angle of the view of the lens,the imaging range is expanding and the image will be deformed and the distortion is difficult to rectify.In order to control the system distortion and improve the imaging quality of pinhole camera,an optical system with a basic structure and an objective lens followed by a rotating image system is proposed;which working distance is 10 meters;full field angle is 100 degrees;relative aperture is 1/2;the pupil is the most lateral of the optical system;focal length is 1.67mm and senor is 1/4 inch CCD.After optimization,the distortion of all field of view is less than 2%,the MTF values at the 200lp/mm space frequency are all greater than 0.3.The spherical aberration,color aberratation and field curvature has well been corrected.The optical properties of small distortion in large field of view have been realized and this system can be applied in covert monitoring.

关 键 词：针孔摄像机 广角镜头 畸变 

分 类 号：TB851.1[一般工业技术—摄影技术]