医用光学变焦消色差内窥物镜设计  

Design of Medical Optical Zoom Achromatic Endoscope Objective

作　　者：程洪涛 李恒宇[2] Cheng Hongtao;Li Hengyu(Department of Development and Plan,Shanghai University of Medicine&Health Sciences,Shanghai 201318,China;School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海健康医学院发展规划处,上海201318 [2]上海大学机电工程与自动化学院,上海200444

出　　处：《激光与光电子学进展》2022年第24期212-216,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62073209,61625304,61991415)。

摘　　要：医用内窥物镜由于空间狭窄,设计难点在于如何进行局部光学变焦并分辨出局部放大人体组织的成像视图,因此物镜要满足低色差、高可靠性、微型化等需求。从分析内窥镜光学变焦存在的技术路线出发,应用阿尔瓦雷斯透镜在内窥物镜中实现光学变焦,这种结构变焦简单、结构稳定、快速且成像可靠。进一步以高斯括号法和像差理论为出发点,发展了基于阿尔瓦雷斯透镜内窥镜物镜消色差变焦光学设计理论。然后依据该理论,推导得到消色差物镜系统光学设计初始值。最后应用光学色差理论求解验证了理论的正确性,为进一步应用阿尔瓦雷斯透镜设计内窥镜提供了光学设计理论基础。Considering the narrow space,the design difficulty of the medical endoscope objective lies in performing local optical zoom and distinguishing the imaging view of locally enlarged human tissues.Therefore,the objective lens must meet the requirements of low chromatic aberration,high reliability,and miniaturization.From the analysis of the technical route for an endoscopic optical zoom,this study proposes the application of the Alvarez lens in the endoscope to achieve optical zoom.The proposed structure has the advantages of achieving simple zoom,stable structure,fast,and reliable imaging.First,we have developed the achromatic zoom optical design theory of the endoscope objective using the Alvarez lens based on the Gaussian bracket method and aberration theory.Then,we derived the initial optical design value of the achromatic objective lens system using the aberration theory.Finally,the optical chromatic aberration theory is used to verify the correctness of the theory,which provides an optical design theoretical basis for the further application of the Alvarez lens in the design of an endoscope.

关 键 词：医用光学 镜头 变焦 内窥镜 光学设计 

分 类 号：O436[机械工程—光学工程]