Annular ring zoom system using two positive axicons

Fred M. Dickey; Jacob D. Conner

doi:10.1117/12.892621

7 September 2011 Annular ring zoom system using two positive axicons

Fred M. Dickey, Jacob D. Conner

Proceedings Volume 8130, Laser Beam Shaping XII; 81300B (2011) https://doi.org/10.1117/12.892621
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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.

Citation Download Citation

Fred M. Dickey and Jacob D. Conner "Annular ring zoom system using two positive axicons", Proc. SPIE 8130, Laser Beam Shaping XII, 81300B (7 September 2011); https://doi.org/10.1117/12.892621

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