Open AccessSmall-phase retrieval with a single far-field image
Author(s) -
Min Li,
Xinyang Li,
Wenhan Jiang
Publication year - 2008
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.16.008190
Subject(s) - phase retrieval , optics , phase (matter) , optical aberration , astigmatism , spherical aberration , zernike polynomials , point spread function , noise (video) , image quality , image processing , computer science , physics , image (mathematics) , wavefront , fourier transform , computer vision , lens (geology) , quantum mechanics
A method to retrieve small phase aberration from a single far-field image is proposed. It is found that in small phase condition, the odd and even parts of phase aberration can be obtained with a simple linear calculation method. The difference between a single measured image with aberration and the calibrated image with inherent aberration are used in the calculation process. It is proved that the most part of the inherent phase aberration of the imaging system must be of even type, such as defocus, astigmatism, etc., to keep the method working. Results of numerical simulations on atmosphere disturbed phase aberrations show that the proposed small phase retrieval method works well when the RMS phase error is less than 1 rad. It is also shown that the method is valid in noise condition when SNR>100.