可连续变倍双远心系统设计及其凸轮曲线分析  

Design of Continuous Zoom Double Telecentric System and Analysis of Cam Curve

作　　者：叶文炜 黄锦煖 周天福 林峰 Ye Wenwei;Huang Jinxuan;Zhou Tianfu;Lin Feng(Fujian Key Laboratory of Photonics Technology,College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou,Fujian 350007,China;Key Laboratory of Medical Optoelectronic Science and Technology,Ministry of Education,College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou,Fujian 350007,China)

机构地区：[1]福建师范大学光电与信息工程学院福建省光子技术重点实验室,福建福州350007 [2]福建师范大学光电与信息工程学院医学光电科学与技术教育部重点实验室,福建福州350007

出　　处：《激光与光电子学进展》2020年第5期210-216,共7页Laser & Optoelectronics Progress

基　　金：福建省科技厅高校产学合作重大项目(2018H6006)。

摘　　要：为满足机器视觉系统对可变倍双远心系统的需求,设计了一款可实现连续变倍的双远心镜头。该系统的放大倍率为-0.50×至-0.20×,物方视场可观测的直径范围为22~55mm,可满足低畸变(各倍率段均小于0.1%)、高分辨率(77.5lp/mm处均大于0.30)、高远心度(各倍率段均小于0.1°)等设计要求,在使用过程中同时具有对物面、像面位移不敏感和可连续变倍检测的优点。重点介绍两种求解变倍凸轮曲线的方法,并进行相互验证,验证结果表明了凸轮曲线数据的准确性,这对变倍系统的后期生产加工具有重要作用。In order to meet the machine vision system’s demand on the zoom double telecentric system,we design a double telecentric lens that can achieve continuous zoom.The system magnification is from-0.50×to-0.20×,and the observable diameter range of the object field of view is from 22 mm to 55 mm.The designed system meets the design requirements of low distortion(less than 0.1%for all multiplications),high resolution(higher than0.30 at 77.5 lp/mm),and high telecentricity(less than 0.1°for all multiplications),and has the advantages of being insensitive to object surface and image plane displacement as well as continuous zoom detection.Two methods to solve the variable cam curve are introduced and used to verify each other.The verification indicates the accuracy of the cam curve data,which plays an important role in the subsequent production and processing of the variable magnification system.

关 键 词：光学设计 机器视觉 变倍双远心系统 凸轮曲线 

分 类 号：TN391[电子电信—物理电子学]