Laser guide star spot shrinkage for affordable wavefront sensors

被引：3
|
作者：
Jahn, Wilfried [1 ]
Hugot, Emmanuel [1 ]
Fusco, Thierry [1 ,2 ]
Neichel, Benoit [1 ]
Ferrari, Marc [1 ]
Correia, Carlos [1 ]
Pueyo, Laurent [3 ]
Dohlen, Kjetil [1 ]
Pascal, Sandrine [1 ]
Vola, Pascal [1 ]
Sauvage, Jean Francois [1 ,2 ]
El Hadi, Kacem [1 ]
Gach, Jean Luc [1 ]
机构：
[1] Aix Marseille Univ, CNRS, LAM, UMR 7326, Marseille, France
[2] Off Natl Etud & Rech Aerosp, French Aerosp Lab, DOTA, F-92322 Chatillon, France
[3] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
来源：
ADAPTIVE OPTICS SYSTEMS V | 2016年 / 9909卷
关键词：
Laser Guide Stars; Spot Shrinkage; Wave front sensing; E-ELT; ELT;
D O I：
10.1117/12.2232367
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Innovative optical designs allow tackling the spot elongation issues in Shack-Hartman based laser guide star wavefront sensors. We propose two solutions using either a combination of two arrays of freeform microlenses, or a combination of freeform optics, to perform a shrinkage of the laser spots as well as a magnification of the SH focal plane. These approaches will drastically reduce the number of needed pixels, thus making possible the use of existing detectors. We present the recent advances on this activity as well as the estimation of performance, linearity and sensitivity of the compressed system in presence of aberrations.
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收藏
页数：6
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