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Journal of Biomedical Optics • Open Access

Large-dynamic-range Shack-Hartmann wavefront sensor for highly aberrated eyes
Author(s): Geun-Young Yoon; Seth Pantanelli; Lana J. Nagy

Paper Abstract

A conventional Shack-Hartmann wavefront sensor has a limitation that increasing the dynamic range usually requires sacrificing measurement sensitivity. The prototype large-dynamic-range Shack-Hartmann wavefront sensor presented resolves this problem by using a translatable plate with subapertures placed in conjugate with the lenslet array. Each subaperture is the same size as a lenslet and they are arranged so that they overlap every other lenslet position. Three translations of the plate are required to acquire four images to complete one measurement. This method increases the dynamic range by a factor of two with no subsequent change in measurement sensitivity and sampling resolution of the aberration. The feasibility of the sensor was demonstrated by measuring the higher order aberrations of a custom-made phase plate and human eyes with and without the plate.

Paper Details

Date Published: 1 May 2006
PDF: 3 pages
J. Biomed. Opt. 11(3) 030502 doi: 10.1117/1.2197860
Published in: Journal of Biomedical Optics Volume 11, Issue 3
Show Author Affiliations
Geun-Young Yoon, Univ. of Rochester (United States)
Seth Pantanelli, Univ. of Rochester (United States)
Lana J. Nagy, Univ. of Rochester (United States)

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