A high precision phase reconstruction algorithm for multi-laser guide stars adaptive optics

• Published in: Chinese physics B 2016-09, Vol.25 (9), p.83-87
• Main Author: 何斌 胡立发 李大禹 徐焕宇 张杏云 王少鑫 王玉坤 杨程亮 曹召良 穆全全 鲁兴海 宣丽
• Format: Article
• Language: English
• Subjects: 激光导星; 相位失真; 种用; 组成部分; 自适应光学; 重建算法; 高分辨率成像; 高精度
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/25/9/094214

Adaptive optics（AO） systems are widespread and considered as an essential part of any large aperture telescope for obtaining a high resolution imaging at present.To enlarge the imaging field of view（FOV）,multi-laser guide stars（LGSs） are currently being investigated and used for the large aperture optical telescopes.LGS measurement is necessary and pivotal to obtain the cumulative phase distortion along a target in the multi-LGSs AO system.We propose a high precision phase reconstruction algorithm to estimate the phase for a target with an uncertain turbulence profile based on the interpolation.By comparing with the conventional average method,the proposed method reduces the root mean square（RMS） error from 130 nm to 85 nm with a 30% reduction for narrow FOV.We confirm that such phase reconstruction algorithm is validated for both narrow field AO and wide field AO.