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Appl Opt. 2006 Jan 1;45(1):144-50.

Extended focus diffractive optical element for Gaussian laser beams.

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  • 1Holo-Or, Ltd., Kiryat Weizmann, P.O. Box 1051, Rehovot 76114, Israel.

Abstract

The depth of focus of the Gaussian beam is extended by introducing a wavefront phase correction with properly designed diffractive optical elements. Results of the computer simulations show that, compared with other methods, the presented method demonstrates a reduced focal spot size and low sidelobes in a focal domain, within a considerable range of defocusing distances. Experimental results for the visible range diffractive optical element with a focus of 40 mm and a depth of focus that extends to 1 mm agree with the theory.

PMID:
16422333
[PubMed]
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