Improvement in retinal image quality with dynamic correction of the eye's aberrations
Improvement in retinal image quality with dynamic correction of the eye's aberrations
复制标题
DOI：
10.1364/oe.8.000631
复制
发表时间：
2001-05-21
期刊：
影响因子：
3.8
通讯作者：
Williams, DR
中科院分区：
文献类型：
--
作者：
Hofer, H;Chen, L;Williams, DR
我们测量了视网膜图像质量的改善，提供了纠正眼波像差的时间变化与闭环自适应光学系统。该系统以高达30赫兹的频率对眼睛的波像差进行采样。眼睛像差的校正可以在0.25-0.5秒内完成，导致6.8毫米瞳孔的残余有效值波前误差低至0.1微米。实时波前测量用于确定如何有效地校正眼睛波像差的空间和时间分量。该系统提供高达5（th）阶的泽尼克模式波动的动态校正，时间频率分量高达0.8 Hz。时间性能与基于理论的预测很好地吻合。眼波像差的时间变化校正使点扩展函数的Strehl比提高了近3倍，使锥状光感受器成像的对比度比仅对眼高阶像差进行静态校正时提高了33%。(C) 2001美国光学学会。
We measured the improvement in retinal image quality provided by correcting the temporal variation in the eye's wave aberration with a closed-loop adaptive optics system. This system samples the eye's wave aberration at rates up to 30 Hz. Correction of the eye's aberrations can be completed in 0.25-0.5 seconds, resulting in residual rms wave-front errors as low as 0.1 microns for 6.8 mm pupils. Real-time wave-front measurements were used to determine how effectively the spatial and temporal components of the eye's wave aberration were corrected. The system provides dynamic correction of fluctuations in Zernike modes up to 5(th) order with temporal frequency components up to 0.8 Hz. Temporal performance is in good agreement with predictions based on theory. Correction of the temporal variation in the eye's wave aberration increases the Strehl ratio of the point spread function nearly 3 times, and increases the contrast of images of cone photoreceptors by 33% compared with images taken with only static correction of the eye's higher order aberrations. (C) 2001 Optical Society of America.