大相对孔径物方远心检测镜头光学系统设计
Optical System Design of Large Numerical Aperture and Object Telecentricity Detection Lens
罗天娇 1丛京洲 2罗春华3
作者信息
- 1. 长春电子科技学院 光电科学与工程学院,长春 130114
- 2. 舜宇光学科技有限公司,宁波 315400
- 3. 长春理工大学 光电工程学院,长春 130022
- 折叠
摘要
针对工业在线检测中线路板瑕疵点检测问题,给出了一种大相对孔径物方远心检测系统的设计.基于镜头设计的具体参数展开工作,首先选用双高斯复杂化系统作为初始结构;然后为了达到远心度与像质的要求加入多种适合的操作数后进行反复优化,最后得到镜头基本参数:放大倍率3.5倍、最大相对孔径D/f′=1/1.6且光圈可调,焦距100 mm,系统长度560 mm.物方远心度小于2°,畸变小于0.01％,轴上调制传递函数在50 lp/mm处大于0.33,0.7视场传递函数在50 lp/mm处大于0.18,整体系统在波长587～760 nm范围内色还原良好.镜头设计结果结构合理,像质优良;系统具有良好加工工艺性及较好的装校性能.
Abstract
Aiming at the problem of circuit board defect detection in industrial on-line testing,a large relative aperture object square telecentric detection system is designed in this paper. This paper is based on the specific parameters of lens design. Firstly,double Gaussian complex system is selected as the initial structure. Then,in order to achieve the require-ments of telecentricity and image quality,a variety of suitable operands are added and optimized repeatedly. Finally,the basic parameters of the lens are obtained:Magnification is 3.5 times,The maximum relative aperture is D/f′=1/1.6 with adjustable aperture,focal length is 100 mm,system length is 560 mm. The maximum telecentricity is 2°,distortion is less than 0.01％,Modulation Transfer function values on the axis are greater than 0.33 at the space of 50 lp·mm-1. MTF values at 0.7 field are greater than 0.18 at the space of 50 lp·mm-1.Color reduction is well at 587～760 nm. The lens design results are reasonable in structure and excellent in image quality. The system has good processing technology and easy to install and calibrate.
关键词
光学设计/大相对孔径/物方远心/双高斯结构Key words
optical design/large relative aperture/object telecentricity/double gaussian structure引用本文复制引用
基金项目
吉林省科技发展计划(20190302098G)
出版年
2024
NETL
NSTL
万方数据