WAVE-FRONT RECONSTRUCTION ERROR OF SHACK-HARTMANN WAVE-FRONT SENSORS

被引：25

作者：

TAKATO, N ^{[1
]}

IYE, M ^{[1
]}

YAMAGUCHI, I ^{[1
]}

机构：

[1] NATL ASTRON OBSERV,MITAKA,TOKYO 181,JAPAN

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1994年 / 106卷 / 696期

关键词：

D O I：

10.1086/133367

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have evaluated the wavefront reconstruction error for Shack-Hartmann wavefront sensors based on a series of simulations for various numbers of subapertures at various levels of measurement error in determining the Hartmann spot centroids. The optimum number of subapertures is derived for a given magnitude reference star in the cases of photon-noise-limited and detector-noise-limited sensors. When the centroid measuring error is absent, the maximum number of Zernike terms that can be corrected by means of modal adaptive compensation is about 1/5 of the number of subapertures. The residual phase error in wavefront reconstruction is shown to be sensitive to the measuring error of the spot centroids. It is essential to reduce the centroid measuring error in wavefront sensors for high-level adaptive optics systems with a large number of degrees of freedom.

引用

页码：182 / 188

页数：7

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