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Proceedings Paper

Beam-shaping elements for holographic applications
Author(s): Ernst-Bernhard Kley; Matthias Cumme; Lars-Christian Wittig; Mike Thieme; Werner Gabler
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Paper Abstract

Recording holographic optical elements usually requires a good illumination uniformity as well as a spherical or plane phase. To fulfill the uniformity demand, an expansion of the Gaussian beam is necessary. This leads to a loss of intensity connected with an essential extension of the recording time. Alternatively, the recording efficiency can be increased by using a beam transformation the beam from a Gaussian into a top hat intensity distribution. We designed, realized and tested a setup for a more efficient hologram recording which can be used for full color application. The heart of the setup is a refractive beam shaping element fabricated by a gray tone lithography and proportional transfer into quartz glass. The beam shaping element shows a conversion efficiency of $GTR99,5% (like a refractive lens) in the whole visible spectral range and an intensity uniformity <5%RMS.

Paper Details

Date Published: 18 August 2000
PDF: 7 pages
Proc. SPIE 4179, Micromachining Technology for Micro-Optics, (18 August 2000); doi: 10.1117/12.395687
Show Author Affiliations
Ernst-Bernhard Kley, Friedrich-Schiller-Univ. Jena (Germany)
Matthias Cumme, Friedrich-Schiller-Univ. Jena (Germany)
Lars-Christian Wittig, Friedrich-Schiller-Univ. Jena (Germany)
Mike Thieme, Friedrich-Schiller-Univ. Jena (Germany)
Werner Gabler, Holographic Systems Muenchen GmbH (Germany)

Published in SPIE Proceedings Vol. 4179:
Micromachining Technology for Micro-Optics
Sing H. Lee; Eric G. Johnson, Editor(s)

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