Novel methods to improve the measurement accuracy and the dynamic range of Shack-Hartmann wavefront sensor

被引：7

作者：

Yu, Lei ^{[1
,2
,3
]}

Xia, Mingliang ^{[3
]}

Xie, Hongsheng ^{[1
,2
,3
]}

Xuan, Li ^{[1
]}

Ma, Ji ^{[4
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China

[3] Chinese Acad Sci, Suzhou Inst Biomed Engn & Technol, Dept Med Imaging, Beijing 100864, Jiangsu, Peoples R China

[4] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA

来源：

JOURNAL OF MODERN OPTICS | 2014年 / 61卷 / 09期

基金：

中国国家自然科学基金;

关键词：

ocular aberrations; matched filter; Shack-Hartmann wavefront sensor; HUMAN-EYE; MONOCHROMATIC ABERRATIONS; CENTROID STATISTICS; PHASE-RETRIEVAL; MATCHED-FILTER; LIGHT; ALGORITHM; NOISE; FIELD;

D O I：

10.1080/09500340.2014.909054

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

As a wavefront sensor, the Shack-Hartmann wavefront sensor plays an important role in the wavefront measurement of human eyes. However, the low measurement accuracy and the small dynamic range of Shack-Hartmann wavefront sensor limit its application. In this paper, we present a matched-filter algorithm to improve the measurement accuracy by more than an order of magnitude. Moreover, we also introduce a new algorithm to extend the dynamic range of Shack-Hartmann wavefront sensor. With this method, the recorded spots of Shack-Hartmann wavefront sensor are not constrained to stay in the corresponding pixel area of the microlens. The result shows that the dynamic range can be extended from 57.1 to 160% for the first 24 items of Zernike wavefronts, respectively. The improvement by our methods makes the Shack-Hartmann more suitable for the measurement of highly aberrated eyes.

引用

页码：703 / 715

页数：13

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