Experimental assessment of the matched filter for laser guide star wavefront sensing

被引：20

作者：

Conan, Rodolphe ^{[1
]}

Lardiere, Olivier ^{[1
]}

Herriot, Glen ^{[2
]}

Bradley, Colin ^{[1
]}

Jackson, Kate ^{[1
]}

机构：

[1] Univ Victoria, Dept Mech Engn, Victoria, BC V8W 3P6, Canada

[2] Canada Herzberg Inst Astrophys, Natl Res Council, Victoria, BC V9E 2E7, Canada

来源：

APPLIED OPTICS | 2009年 / 48卷 / 06期

关键词：

MESOSPHERIC SODIUM LAYER; ADAPTIVE OPTICS; LA-PALMA; SENSOR; SYSTEM;

D O I：

10.1364/AO.48.001198

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Laser guide star wavefront sensing comes with several limitations. When imaged with a Shack-Hartmann wavefront sensor, the laser guide star is seen as extended sources elongated in the directions given by the lenslet locations and the laser axis. A test bed has been built in the Adaptive Optics Laboratory of the University of Victoria that reproduces this effect as seen on extremely large telescopes. A new wavefront sensing algorithm, the matched filter, has been implemented and its performance assessed with the test bed. Its ability to mitigate laser guide star aberrations by tracking the sodium layer fluctuations in a closed loop adaptive optics system is shown. (C) 2009 Optical Society of America

引用

页码：1198 / 1211

页数：14

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