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Optical Engineering

Diffractive elements for imaging with extended depth of focus
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Paper Abstract

We present the abilities of diffractive elements for imaging with extended depth of focus. The elements of interest belong to the class of diffractive structures focusing incident light into a segment of the optical axis. We describe the imaging properties of the two following elements of this kind: the annular axicon and the light sword optical element (LSOE). In particular, the point spread functions and the modulation transfer functions of axicons and LSOEs are analyzed experimentally and numerically in detail. The obtained results correspond to different defocusing parameters. The performed experiments confirm the usefulness of axicons and LSOEs for imaging with extended depth of focus.

Paper Details

Date Published: 1 May 2005
PDF: 7 pages
Opt. Eng. 44(5) 058001 doi: 10.1117/1.1905481
Published in: Optical Engineering Volume 44, Issue 5
Show Author Affiliations
Grzegorz Mikula, Politechnika Warszawska (Poland)
Andrzej Kolodziejczyk, Politechnika Warszawska (Poland)
Michal Makowski, Politechnika Warszawska (Poland)
Czeslaw Prokopowicz, Politechnika Warszawska (Poland)
Maciej Sypek, Politechnika Warszawska (Poland)


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