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Proceedings Paper

Annular ring zoom system using two positive axicons
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Paper Abstract

The production of an annular ring of light with a variable diameter has applications in laser material processing and machining, particle manipulation, and corneal surgery. This can readily be accomplished using a positive and negative axicon pair. However, negative axicons are very expensive and difficult to obtain with small diameters. In this paper, we present a design of an annular ring zoom system using two positive axicons. One axicon is placed a distance before a primary lens that is greater than some prescribed minimum, and the second axicon is placed after the primary lens. The position of the second axicon determines the ring diameter. The ring diameter can be zoomed from some maximum design size to a zero diameter ring (spot). Experimental results from a developmental system will be presented.

Paper Details

Date Published: 7 September 2011
PDF: 7 pages
Proc. SPIE 8130, Laser Beam Shaping XII, 81300B (7 September 2011); doi: 10.1117/12.892621
Show Author Affiliations
Fred M. Dickey, FMD Consulting LLC (United States)
Jacob D. Conner, US Photonics, Inc. (United States)

Published in SPIE Proceedings Vol. 8130:
Laser Beam Shaping XII
Andrew Forbes; Todd E. Lizotte, Editor(s)

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