激光与光电子学进展, 2020, 57 (5): 052201, 网络出版: 2020-03-05
可连续变倍双远心系统设计及其凸轮曲线分析 下载: 1189次
Design of Continuous Zoom Double Telecentric System and Analysis of Cam Curve
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22~55 mm,可满足低畸变(各倍率段均小于 0.1%)、高分辨率(77.5 lp/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。
Abstract
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 than 0.30 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.
叶文炜, 黄锦煖, 周天福, 林峰. 可连续变倍双远心系统设计及其凸轮曲线分析[J]. 激光与光电子学进展, 2020, 57(5): 052201. Wenwei Ye, Jinxuan Huang, Tianfu Zhou, Feng Lin. Design of Continuous Zoom Double Telecentric System and Analysis of Cam Curve[J]. Laser & Optoelectronics Progress, 2020, 57(5): 052201.