Aberration measurements in speckle field by Shack-Hartmann wavefront sensor

被引：3
|
作者：
Goloborodko, Andrey A. [1 ]
Kotov, Myhaylo M. [1 ]
Kurashov, Vitalij N. [1 ]
Podanchuk, Dmytro V. [1 ]
机构：
[1] Taras Shevchenko Natl Univ Kyiv, Fac Radiophys, Elect & Comp Syst, 64-13 Volodymyrska St, UA-01601 Kiev, Ukraine
来源：
OPTICAL ENGINEERING | 2016年 / 55卷 / 12期
关键词：
aberration measurements; speckle; wavefront sensor; correlation length; ADAPTIVE OPTICS; ROUGH SURFACES; DOUBLE-PASS; HUMAN EYE; CURVATURE; LIGHT;
D O I：
10.1117/1.OE.55.12.121710
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The accuracy of the Shack-Hartmann wavefront sensor for measuring wavefront aberrations is mainly dependent upon the measuring accuracy of the centroid of each spot. An effect of the aperture of the 4F system on the correlation properties of speckle patterns produced with monochromatic light is investigated at the Shack-Hartmann sensor plane and at the focal plane of the sensor. An expression for a speckle patterns correlation length changing due to the extended aperture of the 4F system is derived by Fourier optics method. The experimental results that confirm the theoretical dependence quality within the limits of errors are obtained, and it is shown that the spatial finiteness of the optical system causes significant changes of transferred aberrated field. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：6
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