Spatial amplitude and phase modulation using commercial twisted nematic LCDs
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TLDR
This work presents a method for full spatial phase and amplitude control of a laser beam using a twisted nematic LCD combined with a spatial filter that allows precise control of fields even with imperfect modulators.Abstract:
We present a method for full spatial phase and amplitude control of a laser beam using a twisted nematic LCD 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 experimentally demonstrate 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.read more
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References
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Focusing coherent light through opaque strongly scattering media
Ivo M. Vellekoop,Allard Mosk +1 more
TL;DR: Focusing of coherent light through opaque scattering materials by control of the incident wavefront with a brightness up to a factor of 1000 higher than the brightness of the normal diffuse transmission is reported.
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ADAPTIVE OPTICS FOR ASTRONOMY: Principles, Performance, and Applications
TL;DR: In this article, the focus is changed back to angular resolution and collecting power of a telescope by setting the diffraction limit of the telescope, which is determined by its diameter, rather than its angular resolution.
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Holographic data storage
Demetri Psaltis,Geoffrey W. Burr +1 more
TL;DR: Developments in holographic 3D memories are described, in which high density is achieved by superimposing many holograms within the same volume of recording material.
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Demixing light paths inside disordered metamaterials
TL;DR: This work experimentally demonstrates the first method to focus light inside disordered photonic metamaterials by using multi-path interference to make the scattering process itself concentrate light on a fluorescent nanoscale probe at the target position.
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Full-range, continuous, complex modulation by the use of two coupled-mode liquid-crystal televisions
TL;DR: Switchable, continuous, complex-amplitude modulation is demonstrated with two cascaded, twisted nematic liquid-crystal televisions, both operating in phase- and amplitude-coupled modulation modes.
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