Optical Design of Adaptive Optics Scanning Laser Ophthalmoscope with Adjustable Focus

被引:0
作者
Jiang Huilu [1 ,2 ]
Li Chaohong [1 ]
Liao Na [1 ,2 ]
Li Yiyu [1 ,2 ]
Chen Hao [1 ,2 ]
机构
[1] Wenzhou Med Univ, Sch Ophthalmol & Optometry, Wenzhou 325027, Zhejiang, Peoples R China
[2] Wenzhou Med Univ, Eye Hosp, Wenzhou 325027, Zhejiang, Peoples R China
关键词
optical design; ophthalmic imaging system; diopter compensation; image quality evaluation; COHERENCE TOMOGRAPHY; CAMERA;
D O I
10.3788/LOP56.022202
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Adaptive optics scanning laser ophthalmoscopy (AOSLO) has gained increased research attention over the past few decades. This study proposes a focus-adjustable AOSLO that uses a novel optical design comprising a Badal system, a deformable mirror, and a Shack-Hartmann wavefront sensor. This design corrects the low-order aberration of the human cyc by setting a target and adjusting the distance between lenses in the Badal system. The optimum parameters of the Badal system based on the focusing and working principle of the system arc analyzed; then, the system is simulated and optimized by Zemax software. Simulation results show that the spot size of the proposed system is smaller than the diffraction limit in the spot diagram. The Strchl ratio of any diopter is more than 0. 8 and approaches as high as 0. 95 for a low diopter. The modulation transfer function of every field approaches the diffraction limit. Moreover, the theoretical resolution in the normal human retina of this system (2.29 mu m) is in a close range to the diffraction-limit resolution of the proposed system (2.11 mu m). The proposed system can achieve a clear imaging of the human retina for people with a diopter from -6 m(-1) to +6 m(-1).
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页数:10
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