模型人眼的视网膜自适应成像系统

Retinal adaptive optics imaging system based on model eye

为了更好的进行人眼视网膜成像探测及人眼像差校正,建立了一套基于液晶波前校正器的模型,模拟人眼眼底的自适应成像系统。该系统采用Shark-Hartman波前探测器进行波面探测,将探测所得波前畸变经过计算处理转化为灰度图通过电脑施加到LCOS上进行波面校正,通过校正人眼像差的方式来提高系统成像质量。经过校正后,系统波误差从1.92!m降低到0.048!m系统分辨率接近70lp/mm已经到达该光学系统衍射极限分辨。可以满足低阶大像差情况下的模拟人眼视网膜成像要求。

In order to get a better image of the retina and correct the aberration of the eye, a model eye adaptive optics imaging system based on liquid crystal was demonstrated in this paper. The LCOS and HASO32 were used as wave-front corrector and wave-front detector respectively. The wave-front aberration detected was calculated and converted into voltage value. The computer put it on the LCOS to correct the aberration. The optical performance of the model eye was improved by correcting the optical aberration of its own. After correction the wave-front error was reduced from 1.92 m peak-to-valley to 0. 048 m peak-to-valley. The optical system diffraction limit was approached after correction of 70 lp/ mm. We can get a good image of the retina at a circumstance of large low order aberration.