如何有效矫正随人群起伏很大的人眼像差, 提高人眼自适应光学系统的人群适用范围是临床应用面临的最大难题。旋转双柱面镜散光补偿技术是一种使用灵活、低成本的散光补偿方法。给出了旋转双柱面镜散光矫正的理论依据, 并搭建了基于远场光斑形态的散光自动补偿实验系统, 验证了旋转双柱面镜散光矫正理论的正确性。在此基础上, 将旋转双柱面镜与人眼自适应光学系统相结合, 利用哈特曼波前测量数据调整双柱面镜, 实现了(-4~0 Dc)散光的全自动补偿, 补偿精度优于0.1 Dc, 并验证了实际人眼散光补偿效果。该技术结合Badal调焦可以为人眼自适应光学系统的大规模人群适用提供一种经济有效的低阶像差补偿方案。

How to effectively correct ocular aberrations which vary largely from person to person and improve the application scope of adaptive optical system for human retinal imaging is the biggest problem in the clinical application. Rotating cylinders provide a flexible method to correct astigmatism at low cost. This study provides the theoretical basis of rotating cylinders for the astigmatism compensation and an experimental system of automatically correcting astigmatism is established based on the far-field facula analysis to prove the theoretical basis. Then the rotating cylinders are combined with an adaptive optics system and the real-time wavefront is measured by the Hartman-Shack sensor to guide rotating cylinders adjustment. The modified system could compensate the astigmatism aberration automatically from -4 to 0 Dc with residual error lower than 0.1 Dc. Combined with the Badal lens, this system provides an economical and effective method to compensate low aberrations for large-scale clinical applications of adaptive optical system for human retinal imaging.