Performance of Centroiding Algorithms at Low Light Level Conditions in Adaptive Optics

被引：15

作者：

Vyas, Akondi ^{[1
,2
]}

Roopashree, M. B. ^{[1
]}

Prasad, B. R. ^{[1
]}

Vyas, Akondi ^{[1
,2
]}

机构：

[1] Indian Inst Astrophys, CREST, Laser Lab, Bangalore 560034, Karnataka, India

[2] Indian Inst Sci, Phys Dept, Bangalore, Karnataka, India

来源：

2009 INTERNATIONAL CONFERENCE ON ADVANCES IN RECENT TECHNOLOGIES IN COMMUNICATION AND COMPUTING (ARTCOM 2009) | 2009年

关键词：

poisson noise; adaptive optics; Shack Hartmann sensor; centroiding algorithms;

D O I：

10.1109/ARTCom.2009.30

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The performance metrics of different centroiding algorithms at low light level conditions were optimized in the case of a Shack Hartmann Sensor (SHS) for efficient performance of the adaptive optics system. For short exposures and low photon flux, the Hartmann spot does not have a Gaussian shape due to the photon noise which follows poissonian statistics. The centroiding estimation error was calculated at different photon levels in the case of changing spot size and shift in the spot using Monte Carlo simulations. This analysis also proves to be helpful in optimizing the SHS specifications at low light levels.

引用

页码：366 / +

页数：2

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