Direct phase measurement in zonal wavefront reconstruction using multidither coherent optical adaptive technique
Direct phase measurement in zonal wavefront reconstruction using multidither coherent optical adaptive technique
复制标题
DOI：
10.1364/oe.22.001619
复制
发表时间：
2014-01-27
期刊：
影响因子：
3.8
通讯作者：
Ji, Na
中科院分区：
文献类型：
--
作者：
Liu, Rui;Milkie, Daniel E.;Ji, Na
在传统的自适应光学区域波前传感中，在获得局部波前梯度后，假设波前为连续曲面，即可计算出整个波前。这种方法将导致区域波前传感器在重建不连续或采样不足的波前时性能不佳。本文报道了一种利用多相干光自适应技术，通过直接并行测量局部波前相位来重建波前的新方法。该方法可以独立地确定每个瞳孔段的相对相位，从而对不连续的波前产生精确的波前。我们在自适应光学双光子荧光显微镜中实现了这种方法，并证明了它在校正大或不连续像差方面的优越性能。(C) 2014年美国光学学会
In traditional zonal wavefront sensing for adaptive optics, after local wavefront gradients are obtained, the entire wavefront can be calculated by assuming that the wavefront is a continuous surface. Such an approach will lead to sub-optimal performance in reconstructing wavefronts which are either discontinuous or undersampled by the zonal wavefront sensor. Here, we report a new method to reconstruct the wavefront by directly measuring local wavefront phases in parallel using multidither coherent optical adaptive technique. This method determines the relative phases of each pupil segment independently, and thus produces an accurate wavefront for even discontinuous wavefronts. We implemented this method in an adaptive optical two-photon fluorescence microscopy and demonstrated its superior performance in correcting large or discontinuous aberrations. (C) 2014 Optical Society of America