基于同轴柯勒照明的大变倍比紧凑型显微镜设计  

Design of large zoom ratio compact microscope based on coaxial Kohler illumination

作　　者：王起 张国芳 WANG Qi;ZHANG Guo-fang(School of Media and Design,Chuzhou Vocational and Technical College,Chuzhou 239000,China;School of Art,Anhui University of Finance and Economics,Bengbu 233030,China)

机构地区：[1]滁州职业技术学院传媒与设计学院,安徽滁州239000 [2]安徽财经大学艺术学院,安徽蚌埠233030

出　　处：《中国光学（中英文）》2024年第4期921-931,共11页Chinese Optics

基　　金：滁州职业技术学院提质培优《产品表现技法》课堂革命项目(No.2022TZPY046);滁州职业技术学院工业设计特色专业教学资源库项目(No.2022jxzyk04)。

摘　　要：为了实现大靶面、大变倍比显微成像并解决同轴柯勒照明高集成度设计的问题,本文提出了一种基于同轴柯勒照明的大变倍比紧凑型显微镜光学系统设计方法。首先,对望远镜和显微镜连续变倍光学系统的成像原理进行了分析,并对正组补偿式变倍显微镜光学系统的设计原理进行了理论分析。然后,提出把前固定组分解为准直组和汇聚组,并在两镜组间设计分光镜,并通过共用透镜组实现同轴柯勒照明系统的紧凑型设计。最后,对大靶面连续变倍显微镜系统和与之匹配的同轴柯勒照明光学系统进行设计,设计结果表明显微成像光学系统的变倍比为10×,工作距离为60 mm,物方最高分辨率为1.75µm,同轴照明均匀性为94.3%。该系统具有成像质量好、畸变小、变倍曲线平滑、体积小巧等特点,实验验证了该设计方法的可行性。In order to achieve a large image plane and large zoom ratio in microscopic imaging and solve the problem of the high integration of coaxial Kohler illumination,we propose a design method for a compact optical system with a large zoom ratio based on coaxial Kohler illumination.First,the imaging principle of the continuous zoom optical system of telescopes and microscopes is analyzed,and the design principle of the positive group compensation zoom microscope is analyzed theoretically.Then,the front fixed group is di-vided into a collimation group and a convergence group,and a beam splitter prism is designed between the two lens groups to achieve a compact coaxial Kohler illumination optical system by sharing lens groups.Fi-nally,the continuous zoom microscope with a large image plane and the matched coaxial Kohler illumina-tion optical system are designed.The design results show that the zoom ratio of the microscope optical sys-tem is 10×,the working distance is 60 mm,the highest resolution of the object side is 1.75µm,and the coaxi-al illumination uniformity is 94.3%.The designed microscope has excellent imaging quality,minimal distor-tion,a smooth zoom curve,and a compact size,verifying the feasibility of the design method.

关 键 词：连续变倍显微镜 同轴柯勒照明 光学设计 紧凑型 

分 类 号：O439[机械工程—光学工程]