激光与光电子学进展, 2020, 57 (15): 152202, 网络出版: 2020-08-04
数码裂隙灯显微系统前置物镜的设计 下载: 991次
Design of Front Objective for Digital Slit-Lamp Microscope System
光学设计 数码裂隙灯显微镜 前置物镜 平行光路 optical design digital slit-lamp microscope front objective parallel optical path
摘要
数码裂隙灯显微镜主要用于眼科疾病的检查,而前置物镜作为数码裂隙灯显微镜的重要组成部分之一,影响整个系统的成像质量。根据体视显微镜平行光路系统的原理,利用Zemax软件设计并优化一款高性能数码裂隙灯显微镜前置物镜。实验结果表明:低倍光路和高倍光路的最大均方根半径值分别为2.3 μm和5.1 μm。在空间频率为115 lp/mm处,低倍光路时全视场的调制传递函数(MTF)值达到0.30,接近衍射极限,分辨率较高,高倍光路的MTF值在0.15以上,满足眼科使用要求。最后进一步分析偏心对系统引入的彗差和像散的影响,所得结果为加工和装调提供理论依据。
Abstract
Digital slit-lamp microscope is mainly used in the examination of ophthalmic diseases. The front objective lens is one of the important parts of the digital slit-lamp microscope, which affects the imaging quality of the entire system. Based on the parallel optical path principle of the stereo microscope, a high-performance front objective for a digital slit-lamp microscope is designed and optimized by using the Zemax software. Experimental results show that the maximum root mean squared radius of a spot diagram under low and high magnifications are 2.3 and 5.1 μm, respectively. At a spatial frequency of 115 lp/mm, the modulation transfer function (MTF) value of the full field of view under low magnification reaches 0.30, which is close to the diffraction limit and has a high resolution. Under high magnification, the MTF value is above 0.15, which meets the requirements of ophthalmology. Finally, further analysis the effect of eccentricity on the coma and astigmatism introduced by the system, providing a theoretical basis for machining and adjustment.
黄幼萍, 林峰, 黄淑燕, 陈冬英. 数码裂隙灯显微系统前置物镜的设计[J]. 激光与光电子学进展, 2020, 57(15): 152202. Youping Huang, Feng Lin, Shuyan Huang, Dongying Chen. Design of Front Objective for Digital Slit-Lamp Microscope System[J]. Laser & Optoelectronics Progress, 2020, 57(15): 152202.