Extended focus diffractive optical element for Gaussian laser beams

Michael A. Golub, Valery Shurman, Israel Grossinger

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)144-150
Number of pages7
JournalApplied Optics
Volume45
Issue number1
DOIs
StatePublished - 1 Jan 2006
Externally publishedYes

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