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Computational imaging with the logarithmic asphere: theory

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Abstract

A theory for an integrated system is described that combines a logarithmic aspheric imaging lens with maximum-entropy digital processing to extend the depth of field ten times over that of a conventional lens and to provide near-diffraction-limited resolution. Two types of logarithmic aspheres are derived that are circularly symmetric lenses with controlled continuous radial variation of focal length. The details of an iterative maximum-entropy algorithm are also presented. The properties of convergence and speed of the algorithm are greatly improved by introducing a metric parameter to adjust the weight of different pixel values of the recovered picture in each loop properly.

© 2003 Optical Society of America

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Corrections

Wanli Chi and Nicholas George, "Computational imaging with the logarithmic asphere: theory: erratum," J. Opt. Soc. Am. A 21, 1118-1118 (2004)
https://opg.optica.org/josaa/abstract.cfm?uri=josaa-21-6-1118

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