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Proceedings Paper

Applying field mapping refractive beam shapers to improve holographic techniques
Author(s): Alexander Laskin; Gavin Williams; Richard McWilliam; Vadim Laskin
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Paper Abstract

Performance of various holographic techniques can be essentially improved by homogenizing the intensity profile of the laser beam with using beam shaping optics, for example, the achromatic field mapping refractive beam shapers like πShaper. The operational principle of these devices presumes transformation of laser beam intensity from Gaussian to flattop one with high flatness of output wavefront, saving of beam consistency, providing collimated output beam of low divergence, high transmittance, extended depth of field, negligible residual wave aberration, and achromatic design provides capability to work with several laser sources with different wavelengths simultaneously. Applying of these beam shapers brings serious benefits to the Spatial Light Modulator based techniques like Computer Generated Holography or Dot-Matrix mastering of security holograms since uniform illumination of an SLM allows simplifying mathematical calculations and increasing predictability and reliability of the imaging results. Another example is multicolour Denisyuk holography when the achromatic πShaper provides uniform illumination of a field at various wavelengths simultaneously. This paper will describe some design basics of the field mapping refractive beam shapers and optical layouts of their applying in holographic systems. Examples of real implementations and experimental results will be presented as well.

Paper Details

Date Published: 9 February 2012
PDF: 7 pages
Proc. SPIE 8281, Practical Holography XXVI: Materials and Applications, 82810K (9 February 2012); doi: 10.1117/12.903615
Show Author Affiliations
Alexander Laskin, AdlOptica Optical Systems GmbH (Germany)
Gavin Williams, The Univ. of Sheffield (United Kingdom)
Richard McWilliam, Durham Univ. (United States)
Vadim Laskin, AdlOptica Optical Systems GmbH (Germany)

Published in SPIE Proceedings Vol. 8281:
Practical Holography XXVI: Materials and Applications
Hans I. Bjelkhagen; V. Michael Bove Jr., Editor(s)

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