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。

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.