Spatial amplitude and phase modulation using commercial twisted nematic LCDs

Details Spatial amplitude and phase modulation using commercial twisted nematic LCDs Spatial amplitude and phase modulation using commercial twisted nematic LCDs

2007-11-27

arxiv.org/abs/0711.4301v2

Physics

Optics

10 pages, 6 figures

Scientific paper

10.1364/AO.47.002076

We present a method for full spatial phase and amplitude control of a laser beam using a twisted nematic liquid crystal display combined with a spatial filter. By spatial filtering we combine four neighboring pixels into one superpixel. At each superpixel we are able to independently modulate the phase and the amplitude of light. We demonstrate experimentally the independent phase and amplitude modulation using this novel technique. Our technique does not impose special requirements on the spatial light modulator and allows precise control of fields even with imperfect modulators.

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