大视场液晶自适应视网膜成像系统

刘丽丽; 黄涛; 蔡敏; 高明; 封文江

doi:10.3788/OPE.20132102.0301

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大视场液晶自适应视网膜成像系统

现代应用光学 | 更新时间：2020-08-12

- 大视场液晶自适应视网膜成像系统
- Retinal imaging system with large field of view based on liquid crystal adaptive optics
- 光学精密工程 2013年21卷第2期页码：301-307
- 作者机构：
  
  沈阳师范大学物理科学与技术学院
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目（No. 11204299）()
- DOI：10.3788/OPE.20132102.0301
  中图分类号： TP212.14;O439
- 收稿日期：2012-11-29，
  
  修回日期：2013-01-05，
  
  纸质出版日期：2013-02-15
- 稿件说明：
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刘丽丽黄涛蔡敏高明封文江. 大视场液晶自适应视网膜成像系统[J]. 光学精密工程, 2013,21(2): 301-307

LIU Li-li HUANG Tao CAI Min GAO Ming FENG Wen-jiang . Retinal imaging system with large field of view,based on liquid crystal adaptive optics[J]. Editorial Office of Optics and Precision Engineering, 2013,21(2): 301-307
刘丽丽黄涛蔡敏高明封文江. 大视场液晶自适应视网膜成像系统[J]. 光学精密工程, 2013,21(2): 301-307 DOI： 10.3788/OPE.20132102.0301.

LIU Li-li HUANG Tao CAI Min GAO Ming FENG Wen-jiang . Retinal imaging system with large field of view,based on liquid crystal adaptive optics[J]. Editorial Office of Optics and Precision Engineering, 2013,21(2): 301-307 DOI： 10.3788/OPE.20132102.0301.

摘要

设计了大视场眼底自适应成像系统，用于扩大现有视网膜自适应成像系统的视场。对人眼等晕角视场下的自适应像差校正成像进行分析，确定了波前探测与成像校正两个过程对视场的不同要求。在共光源像差探测及成像光学系统中，采用切变视场光阑的方式先后在波前探测和自适应校正成像过程中进行小-大视场切换，避免了大视场中眼波像差探测失真问题，使成像区域由200 μm扩展到500 μm。利用人眼等晕角大视场使眼底液晶自适应成像系统在不降低成像质量的前提下将成像区域扩展了2.5倍，大幅提升了该自适应成像系统在临床上应用的可行性。

Abstract

A retinal imaging Adaptive Optical(AO) system with a large Field of View(FOV) was designed to expand the FOV of the retinal image of liquid crystal AO system. Based on analysis of the AO retinal imaging system under an isoplanatic angle

it pointed out that the FOV for wave-front detection should be smaller than a half isoplanatic angle for precise wave-front detection and the half FOV should not be larger than the isoplanatic angle in imaging. A coaxial wave-front detection and optical imaging system was fabricated

meanwhile

an adjustable pupil was used to switch the different FOVs for wave-front detection and imaging

respectively. After adaptive optical wave front correction

the wave-front error is significantly reduced and the FOV for imaging is enlarged from a diameter of 200 μm to 500 μm without any harmful effect on imaging quality. By utilizing an adjustable pupil in the system based on the isoplanatic angle

the retinal image FOV has increased by 2.5 times as compared with that of existing AO system. The applicability of the system on clinical practice is increased a lot by this research.

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references

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