Hampson Karen M, Chin Sem Sem, Mallen Edward A
Bradford School of Optometry and Vision Science, University of Bradford, Richmond Rd, Bradford, UK.
Opt Express. 2009 Sep 28;17(20):18229-40. doi: 10.1364/OE.17.018229.
Manipulation of the eye's aberrations using adaptive optics (AO) has shown that optical imperfections can affect the dynamic accommodation response. A limitation of current system designs used for such studies is an inability to make direct measurements of the eye's aberrations during the experiment. We present an AO system which has a dual wavefront sensing channel. The corrective device is a 37-actuator piezoelectric deformable mirror. The measurements used to control the mirror, and direct measurements of the eye's aberrations, are captured on a single Shack-Hartmann sensor. Other features of the system include stroke amplification of the deformable mirror and a rotating diffuser to reduce speckle.We demonstrate the utility of the system by investigating the impact of aberration dynamics on the control of steady-state accommodation on four subjects.
利用自适应光学（AO）对眼睛像差进行调控的研究表明，光学缺陷会影响动态调节反应。此类研究中当前使用的系统设计存在一个局限性，即无法在实验过程中直接测量眼睛的像差。我们展示了一种具有双波前传感通道的AO系统。校正装置是一个37个驱动器的压电变形镜。用于控制该变形镜的测量以及眼睛像差的直接测量，均在单个夏克-哈特曼传感器上进行采集。该系统的其他特性包括变形镜的行程放大以及用于减少散斑的旋转漫射器。我们通过研究像差动态对四名受试者稳态调节控制的影响，证明了该系统的实用性。
