Stellar scintillations as a remote atmospheric wave-front sensor

被引：15

作者：

Ribak, EN ^{[1
]}

Gershnik, E ^{[1
]}

Cheselka, M ^{[1
]}

机构：

[1] UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721

来源：

OPTICS LETTERS | 1996年 / 21卷 / 06期

关键词：

D O I：

10.1364/OL.21.000435

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Stellar scintillations are considered noise in adaptive-optics sensors and are measured for calibration purposes only. We propose to use scintillations to provide direct instantaneous information about the structure of the atmosphere. As a result it will be possible to increase the field of view provided by adaptive optics. The scintillation pattern is created when stellar light is diffracted by high-altitude turbulence. Alternatively, this pattern can be viewed as a Laplacian of this turbulence and can thus be inverted to estimate it. The measurement is limited by the intensity and the angular size of the reference star, by the height distribution of the atmospheric turbulence, and by the detector resolution and spectral response. (C) 1996 Optical Society of America

引用

页码：435 / 437

页数：3