Atmospheric turbulence profiling with multi-aperture scintillation of a Shack?Hartmann sensor
Atmospheric turbulence profiling with multi-aperture scintillation of a Shack?Hartmann sensor
复制标题
使用 Shack?Hartmann 传感器的多孔闪烁进行大气湍流分析
DOI：
10.1093/mnras/stab105
复制
发表时间：
2021
影响因子：
4.8
通讯作者：
Ono Yoshito
中科院分区：
文献类型：
--
作者：
Ogane Hajime;Akiyama Masayuki;Oya Shin;Ono Yoshito
自适应光学（AO）系统使用大气湍流的三维结构的层析成像估计需要垂直大气湍流轮廓，其描述作为高度的函数的湍流强度作为先验信息。我们提出了一种新的方法来重建轮廓应用多孔径闪烁传感器（MASS）的方法获得的Shack-Hartmann波前传感器（SH-WFS）的闪烁数据。与传统的MASS相比，该方法利用了四个同心环形孔径内的大气闪烁，新方法利用了数百个空间图案中的闪烁，这些图案是由SH-WFS子孔径的组合产生的。采用贝叶斯推理对湍流廓线重建的精度进行了评估，证实了由于约束条件较多，可以重建10层以上的湍流廓线。我们证明了新的方法与SH-WFS连接到51厘米望远镜在东北大学，我们确认，大气湍流轮廓的一般特征再现。
Adaptive optics (AO) systems that use tomographic estimation of the three-dimensional structure of atmospheric turbulence require the vertical atmospheric turbulence profile, which describes turbulence strength as a function of altitude as prior information. We propose a novel method to reconstruct the profile by applying a multi-aperture scintillation sensor (MASS) method to scintillation data obtained by a Shack–Hartmann wavefront sensor (SH-WFS). Compared with a traditional MASS, which uses atmospheric scintillation within four concentric annular apertures, the new method utilizes scintillation in several hundreds of spatial patterns, which are created by combinations of SH-WFS subapertures. Accuracy of the turbulence profile reconstruction is evaluated with Bayesian inference, and it is confirmed that the turbulence profile with more than 10 layers can be reconstructed because of the large number of constraints. We demonstrate the new method with a SH-WFS attached to the 51-cm telescope at Tohoku University and we confirm that the general characteristics of the atmospheric turbulence profile are reproduced.