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Proceedings Paper

Optimization of wavefront coding imaging system using heuristic algorithms
Author(s): E. González-Amador; A. Padilla-Vivanco; C. Toxqui-Quitl; O. Zermeño-Loreto
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Paper Abstract

Wavefront Coding (WFC) systems make use of an aspheric Phase-Mask (PM) and digital image processing to extend the Depth of Field (EDoF) of computational imaging systems. For years, several kinds of PM have been designed to produce a point spread function (PSF) near defocus-invariant. In this paper, the optimization of the phase deviation parameter is done by means of genetic algorithms (GAs). In this, the merit function minimizes the mean square error (MSE) between the diffraction limited Modulated Transfer Function (MTF) and the MTF of the system that is wavefront coded with different misfocus. WFC systems were simulated using the cubic, trefoil, and 4 Zernike polynomials phase-masks. Numerical results show defocus invariance aberration in all cases. Nevertheless, the best results are obtained by using the trefoil phase-mask, because the decoded image is almost free of artifacts.

Paper Details

Date Published: 23 August 2017
PDF: 7 pages
Proc. SPIE 10375, Current Developments in Lens Design and Optical Engineering XVIII, 103750Y (23 August 2017); doi: 10.1117/12.2273063
Show Author Affiliations
E. González-Amador, Univ. Politécnica de Tulancingo (Mexico)
A. Padilla-Vivanco, Univ. Politécnica de Tulancingo (Mexico)
C. Toxqui-Quitl, Univ. Politécnica de Tulancingo (Mexico)
O. Zermeño-Loreto, Univ. Politécnica de Tulancingo (Mexico)

Published in SPIE Proceedings Vol. 10375:
Current Developments in Lens Design and Optical Engineering XVIII
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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