Chinese Journal of Liquid Crystals and Displays, Volume. 38, Issue 5, 563(2023)

Research on improving the universality of adaptive optical retinal imaging system

Yan-yan YANG1,2, Qi-li HU3, Ming HU1,2, Lü JIANG1,2, Jia-hao FENG1,2, Sheng-xiao HUA1,2, Jing-jing WU1,2, Zhou-ping SU1,2, and Li-fa HU1,2、*
Author Affiliations
  • 1College of Science,Jiangnan University,Wuxi 214122,China
  • 2Jiangsu Provincial Research Center of Light Industry Optoelectronic Engineering and Technology,Wuxi 214122,China
  • 3Key Laboratory of Electro-Optical Countermeasure Test & Evaluation Technology,Luoyang 471003,China
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    Adaptive optics is widely used to correct aberrations in the human eye, achieving high-resolution imaging of fundus cells and microvessels. Traditional adaptive optics systems are limited by the dynamic range of the Shack Hartmann wavefront detector and are only suitable for some people, and cannot perform fundus high-resolution imaging in people with high refractive errors. In order to improve the universality of fundus adaptive optical imaging system, this paper designs a high-resolution fundus adaptive optical imaging system based on voice coil deformation mirror. The introduction of the Badal focusing system can perform high-resolution imaging of the fundus with the diopter of the human eye between -8~8 D. In this system, the traditional annular diaphragm is replaced with an adjustable axial cone lens set, the spacing of positive and negative axonal cone lenses are controlled to adjust the inner diameter of annular light in order to adapt the cornea of different eyes, and avoid stray light reflected by the cornea. Large field of view imaging is realized through visual beacon guidance. The simulation results show that the illumination subsystem has a uniform distribution of retinal illumination in the fundus. Within the set tolerance, at least 90% of the MTF values reach 0.21 at 25 lp/mm (corresponding to 4 μm on the retina). The corresponding optical path was built in the laboratory, and the simulated human eye with large distortion was imaged, and a good imaging effect was obtained.

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    Yan-yan YANG, Qi-li HU, Ming HU, Lü JIANG, Jia-hao FENG, Sheng-xiao HUA, Jing-jing WU, Zhou-ping SU, Li-fa HU. Research on improving the universality of adaptive optical retinal imaging system[J]. Chinese Journal of Liquid Crystals and Displays, 2023, 38(5): 563

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    Paper Information

    Category: Research Articles

    Received: Jan. 25, 2023

    Accepted: --

    Published Online: Jul. 4, 2023

    The Author Email: Li-fa HU (hulifa@jiangnan.edu.cn)

    DOI:10.37188/CJLCD.2023-0019

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