Appl Opt. 2011 Feb 1;50(4):509-18. doi: 10.1364/AO.50.000509.

Reducing the diffraction artifacts while implementing a phase function on a spatial light modulator.

Benoît-Pasanau C, Goudail F, Chavel P, Cano JP, Ballet J.

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Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Université Paris-Sud, Campus Polytechnique, Palaiseau, France.

Abstract

Spatial light modulators are often used to implement phase modulation. Since they are pixelated, the phase function is usually approximated by a regularly sampled piecewise constant function, and the periodicity of the pixel sampling generates annoying diffraction peaks. We theoretically investigate two pixelation techniques: the isophase method and a new nonperiodic method derived from the Voronoi tessellation technique. We show that, for a suitable choice of parameters, the diffraction peaks disappear and are replaced by a smoothly varying halo. We illustrate the potential of these two techniques for implementing a lens function and wavefront correction.

PMID:: 21283242; [PubMed]

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Reducing the diffraction artifacts while implementing a phase function on a spat...
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Appl Opt. 2011 Feb 1 ;50(4):509-18. doi: 10.1364/AO.50.000509.

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