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Journal Articles Applied optics Year : 2011

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

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.
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Dates and versions

hal-00564763 , version 1 (06-04-2012)

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Cite

Céline Benoit-Pasanau, François Goudail, Pierre Chavel, Jean-Paul Cano, Jérôme Ballet. Reducing the diffraction artifacts while implementing a phase function on a spatial light modulator. Applied optics, 2011, 50 (9), pp.509-518. ⟨10.1364/AO.50.000509⟩. ⟨hal-00564763⟩
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