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

Charles-Edouard Leroux | Zendy; Christopher Dainty | Zendy

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

Author(s) -

Charles-Edouard Leroux,

Christopher Dainty

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.019055

Subject(s) - zernike polynomials , wavefront , centroid , optics , computer science , wavefront sensor , simple (philosophy) , noise (video) , adaptive optics , range (aeronautics) , algorithm , deformable mirror , physics , computer vision , artificial intelligence , image (mathematics) , philosophy , materials science , epistemology , composite material

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.

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