A simple and robust method to extend the dynamic range of an aberrometer

被引：25

作者：

Leroux, C. ^{[1
]}

Dainty, C. ^{[1
]}

机构：

[1] Natl Univ Ireland, Sch Phys, Appl Opt Grp, Galway, Ireland

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 21期

基金：

爱尔兰科学基金会;

关键词：

SHACK-HARTMANN SENSOR; WAVE-FRONT SENSOR; ASTIGMATIC MICROLENSES; ALGORITHM; KERATOCONUS; ABERRATION; EXPANSION; EYES;

D O I：

10.1364/OE.17.019055

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present an algorithm to extend significantly the dynamic range of a Shack-Hartmann wavefront sensor. With this method, the recorded Shack-Hartmann spots are not constrained to stay in the field of view of their lenslet. The proposed algorithm is computationally effective, robust to a high level of noise on the measured centroid positions and also to missing centroid values. The principle is closely related to the description of wavefronts using Zernike polynomials, which makes optimization for a given sensor and application achievable thanks to numerical simulation. These features make it useful for the measurements of highly aberrated eyes. (C) 2009 Optical Society of America

引用

页码：19055 / 19061

页数：7

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