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Proceedings Paper

Design of diffractive beam-shaping elements for nonuniform illumination waves
Author(s): Andreas Hermerschmidt; Hans Joachim Eichler; Stephan Teiwes; Joerg Schwartz
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Paper Abstract

A method for the design of diffractive beam-shaping elements is presented which extends the finite-element-meshes method proposed by Dresel et al. In particular, the modified method can be applied to non-uniform intensity distributions in the input and output planes. This extension is of practical significance due to the non-uniformity of real laser beam intensity distributions. The method is shown to result in so-called smooth phase functions which are desired for beam- shaping applications to overcome the well-known speckle problem. Transmission functions of diffractive phase-only elements have been computed solving beam-shaping problems of practical relevance. We have demonstrated by numerical simulation experiments that the computed elements perform the desired beam-shaping operations in good approximation.

Paper Details

Date Published: 18 June 1998
PDF: 9 pages
Proc. SPIE 3291, Diffractive and Holographic Device Technologies and Applications V, (18 June 1998); doi: 10.1117/12.310592
Show Author Affiliations
Andreas Hermerschmidt, Technical Univ. of Berlin (Germany)
Hans Joachim Eichler, Technical Univ. of Berlin (Germany)
Stephan Teiwes, Berlin Institute of Optics (Switzerland)
Joerg Schwartz, Berlin Institute of Optics (United Kingdom)

Published in SPIE Proceedings Vol. 3291:
Diffractive and Holographic Device Technologies and Applications V
Ivan Cindrich; Sing H. Lee, Editor(s)

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