Phase estimation for large field of view: application to multiconjugate adaptive optics

被引：42

作者：

Fusco, T ^{[1
]}

Conan, JM ^{[1
]}

Michau, V ^{[1
]}

Mugnier, LM ^{[1
]}

Rousset, G ^{[1
]}

机构：

[1] Off Natl Etud & Rech Aerosp, Dept Opt, F-92322 Chatillon, France

来源：

PROPAGATION AND IMAGING THROUGH THE ATMOSPHERE III | 1999年 / 3763卷

关键词：

adaptive optics; atmospheric turbulence; wavefront sensing; anisoplanatism; telescopes;

D O I：

10.1117/12.363606

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

We propose a "Maximum A Posteriori-based" estimation of the turbulent phase in a large field of view (FOV) to overcome the anisoplanatism limitation in adaptive optics. We show that, whatever the true atmospheric profile, a small number of equivalent layers (2 or 3) is required to obtain an accurate restitution of the phase in the whole FOV. The implications on multiconjugate adaptive optics are discussed in terms of number and conjugated heights of the deformable mirrors. The number of guide stars for the wavefront measurements in the field is also discussed: 3 (or even 2) guide stars are sufficient to obtain good performance.

引用

页码：125 / 133

页数：9