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Optical Engineering

Simple phase optical elements for narrowing of a focal spot in high-numerical-aperture conditions
Author(s): Svetlana N. Khonina
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Paper Abstract

It is shown that a decrease in the size of the focal spot produced by a high numerical aperture focusing system comes as the result of the spatial redistribution of different electric field components in the focal region. The focal distribution of electric field components can be controlled using vortex or binary phase diffractive elements. Situations for differently polarized incident laser beams are discussed and illustrated.

Paper Details

Date Published: 7 March 2013
PDF: 8 pages
Opt. Eng. 52(9) 091711 doi: 10.1117/1.OE.52.9.091711
Published in: Optical Engineering Volume 52, Issue 9
Show Author Affiliations
Svetlana N. Khonina, Image Processing Systems Institute (Russian Federation)


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