基于层析传感的自适应光学眼底成像系统  

Fundus Imaging System Based on Tomographic Adaptive Optics

作　　者：武楚晗 张晓芳[1] 陈蔚林[2] 常军[2] 

机构地区：[1]北京理工大学光电学院自适应光学实验室,北京100081 [2]北京理工大学光电学院光电技术与信息系统实验室,北京100081

出　　处：《光学学报》2017年第4期137-144,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61471039)

摘　　要：为了解决传统自适应光学系统校正视场小的问题,提出了一种层析自适应光学眼底成像系统。以Zemax为工具,Liou-Brennan(LB)眼模型为仿真对象,研究了层析自适应光学眼底成像系统的性能。分析了20°视场内的眼底像差特性,用Zernike边缘多项式描述眼底像差,获得了不同视场内眼底像差的类型和大小。对比了传统自适应光学和层析自适应光学眼底成像系统的性能。结果表明,相较于传统自适应光学,层析自适应光学系统可将校正视场从1.2°扩大至3°。确定了传统自适应光学和层析自适应光学眼底成像系统中变形镜的最佳共轭位置,均位于出瞳面前3mm,此位置与人眼角膜共轭。We propose a fundus imaging system based on the tomographic adaptive optics instead of conventional adaptive optics to increase the limited field of view. The performance of the proposed system is studied with Zemax and the simulation object, Liou-Brennan （LB） eye model. The human eye aberrations are described by Zernike fringe polynomials within 20~ field of view to obtain the type and value of fundus aberrations. The results indicate that the proposed system extends the field of view from 1.2~ to 3~ compared with the conventional adaptive optics system. How to select the conjugated position of the deformable mirror for adaptive optics based fundus imaging systems is investigated. It figures that the deformable mirror can be optically conjugated at 3 mm before the exit pupil of eye for both the conventional adaptive optics system and the proposed system, and the position is also conjugated with cornea.

关 键 词：成像系统 自适应光学 层析法 大视场 变形镜共轭位置 眼底成像 

分 类 号：O436[机械工程—光学工程]