低畸变机器视觉镜头的仿真设计  

Simulation Design of Low Distortion Machine Vision Lens

作　　者：姜禹豪 杨亮亮[1] 陈慧妍 叶雨荫 JIANG Yuhao;YANG Liangliang;CHEN Huiyan;YE Yuyin(School of Physics and Electronics Engineering,Yancheng Teachers University,Yancheng 224007,China)

机构地区：[1]盐城师范学院物理与电子工程学院,江苏盐城224007

出　　处：《大学物理实验》2024年第3期90-93,共4页Physical Experiment of College

基　　金：江苏省智能光电器件与测控工程研究中心开放基金(306054014);2023年大学生创新创业训练计划项目(省级重点项目202310324018Z)。

摘　　要：为了实现电子芯片等小尺寸零部件的定位识别和精密检测,利用Zemax软件设计了两种可以用于机器视觉的低畸变光学镜头。系统焦距为28.5 mm,物方视场为10 mm。通过仿真优化设计得到由六片透镜组成的全球面折射式镜头,总长为90 mm,在空间频率100 lps/mm处,所有视场的MTF都高于0.5,最大畸变为-0.078%。在此基础上,进一步优化设计得到折衍射混合镜头,共有四片透镜,总长为75 mm,相同空间频率处MTF高于0.55,最大畸变为0.071%。考虑衍射面的衍射效率对系统MTF的影响,混合系统的MTF仍然高于0.52。通过仿真设计,既可以让学生了解机器视觉镜头的设计特点,还可以锻炼学生的创新能力。In order to realize the positioning and precise detection of small objects such as electronic chips,two kinds of low distortion optical lens which can be used in machine vision are designed with Zemax software.The focal length is 28.5 mm,and the object field of view is 10 mm.A traditional refractive lens,with all spherical surfaces,consisting of six lenses with a total length of 90 mm is obtained through optimization design.At the spatial frequency of 100lps/mm,the MTF of all fields of view is higher than 0.5,and the maximum distortion is-0.078%.On the basis,a refractive diffractive hybrid lens,consisting of four lenses,is further optimized.The total length is 75 mm,MTF is above 0.55 at the same spatial frequency,and the maximum distortion of 0.071%.Considering the influence of diffraction efficiency of the diffractive surface on MTF,the actual MTF of the mixed system is still higher than 0.52.Through simulation design,students can not only understand the design characteristics of machine vision lens,but also exercise their innovative ability.

关 键 词：仿真实验 机器视觉 畸变 Zemax软件 

分 类 号：O439[机械工程—光学工程]