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Proceedings Paper

Pupil-phase optimization for extended-focus, aberration-corrected imaging systems
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Paper Abstract

The insertion of a suitably designed phase plate in the pupil of an imaging system makes it possible to encode the depth dimension of an extended three-dimensional scene by means of an approximately shift-invariant PSF. The so-encoded image can then be deblurred digitally by standard image recovery algorithms to recoup the depth dependent detail of the original scene. A similar strategy can be adopted to compensate for certain monochromatic aberrations of the system. Here we consider two approaches to optimizing the design of the phase plate that are somewhat complementary - one based on Fisher information that attempts to reduce the sensitivity of the phase encoded image to misfocus and the other based on a minimax formulation of the sum of singular values of the system blurring matrix that attempts to maximize the resolution in the final image. Comparisons of these two optimization approaches are discussed. Our preliminary demonstration of the use of such pupil-phase engineering to successfully control system aberrations, particularly spherical aberration, is also presented.

Paper Details

Date Published: 26 October 2004
PDF: 11 pages
Proc. SPIE 5559, Advanced Signal Processing Algorithms, Architectures, and Implementations XIV, (26 October 2004); doi: 10.1117/12.560235
Show Author Affiliations
Sudhakar Prasad, Univ. of New Mexico (United States)
V. Paul Pauca, Wake Forest Univ. (United States)
Robert J. Plemmons, Wake Forest Univ. (United States)
Todd C. Torgersen, Wake Forest Univ. (United States)
Joseph van der Gracht, Holospex, Inc. (United States)

Published in SPIE Proceedings Vol. 5559:
Advanced Signal Processing Algorithms, Architectures, and Implementations XIV
Franklin T. Luk, Editor(s)

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