25×显微镜物镜设计

应用光学课程设

计报告

姓名：刘思蔚、靳欢、张琪

专业与班级：光信1班指导教师：朱亚东

专业设计名称：25x显微镜物镜设计

专业设计单位：天津理工大学

目录

摘要 ................................................................................................................................ I ABSTRACT ................................................................................................................... I 1绪论 ............................................................................................................................ I I 2物镜设计方案 (1)

3物镜设计参数及镜片选择 (2)

3.1物镜的数值孔径 (2)

3.2物镜的鉴别率 (3)

3.3物镜的有效放大倍数 (4)

3.4垂直鉴别率 (4)

3.5实际参数确定 (4)

4 25×显微镜物镜光学系统仿真过程 (5)

4.1选择初始结构并设置参数 (5)

4.2自动优化 (5)

4.3物镜的光线像差(R AY A BERRATION)分析 (6)

4.4物镜的波像均方差(OPD)分析 (7)

4.5物镜的光学传递函数(MTF)分析 (8)

4.6最终仿真参数分析 (9)

5心得体会 (10)

6参考文献 (10)

摘要

物镜是显微镜最重要的光学部件,利用光线使被检物体第一次成象,因而直接关系和影响成象的质量和各项光学技术参数,是衡量一台显微镜质量的首要标准。

物镜的结构复杂,制作精密,由于对象差的校正,金属的物镜筒内由相隔一定距离并被固定的透镜组组合而成.物镜有许多具体的要求,如合轴,齐焦.

现代显微物镜已达到高度完善,其数值孔径已接近极限,视场中心的分辨率与理论值之区别已微乎其微.但继续增大显微物镜视场与提高视场边缘成象质量的可能性仍然存在,这种研究工作,至今仍在进行。

本次课设主要是应用ZEMAX光学设计软件，设计出25×显微镜物镜光学系统。经过计算机优化—系统分析—微调参数—改变参数变量—再次进行优化反复过程之后，设计出了能够很好的消除系统像差的非球面物镜和整个光学系统，使得成像光斑达到了衍射极限。分析和评价模拟结果的点列图、波像均方差、波前均方差、光学传递函数等参数，设计出符合设计要求的显微物镜。

关键词：显微物镜；ZEMAX；优化；光学系统

Abstract

The most important objective is microscope optical components, use light was the first object, so direct relation with little influence imaging quality and technical parameters of the optical microscope, is the primary measure a quality standard.

The structure is complex, objective, because of poor precision calibration, metal objects from the telescope in a certain distance apart and fixed lens groups. There are many specific objective requirements, such as close to axis.

Modern microscope objectives, it has already reached the height already nearing their limits numerical aperture, view of theoretical resolution of the center with little difference has a narrow-sized microscope objectives. The view and improve the quality of imaging edge view, this study is still possible, still in the works.

This class is mainly applied set ZEMAX optical design software, design and x microscope optical system accurately. Through computer optimization, system analysis - fine-tuning

parameters - changing parameters optimized variables - again after repeated process, designed to eliminate system as the objectives and poor aspheric optics system, make whole disk image reached diffraction limit. The simulated results of analysis and evaluation, point a wave of variance, the mean square error, optical transmission function parameters, designed comply with the design requirements of the microscope objectives.

Keywords: microscope objectives, ZEMAX, Optimization, Optical systems.