Topic
Spatial light modulator
About: Spatial light modulator is a research topic. Over the lifetime, 9043 publications have been published within this topic receiving 130143 citations.
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TL;DR: In this paper, the authors investigate the usefulness of the optical tweezers for biological sample micro-manipulation and report multiple optical trapping and manipulation of Escherichia coli cells, immersed in growth medium, by means of diffractive optical elements.
35 citations
Patent•
17 Dec 1992TL;DR: In this article, a color video display system using a white light source and attaining increased brightness is disclosed, where the brightness can be increased in both temporal and spatial filtering systems.
Abstract: A color video display system using a white light source and attaining increased brightness is disclosed. The brightness can be increased in both temporal and spatial filtering systems. In a temporal system, a portion of the total illumination time is allocated to white light to raise the overall brightness. In a spatial system, part (26) of the illuminated area (18) is allocated to white light. The parts (20, 22, 24, 26) could be allocated as regions on a spatial light modulator (18), or a spatial light modulator could be dedicated to that area to use white light. Control means determine a minimum brightness level and operate the spatial light modulator to achieve the minimum brightness during projection of the white light.
35 citations
TL;DR: In this article, an active terahertz liquid crystal (LC) metamaterial has been experimentally investigated for THz wave modulation, where the LC layer is indeed a phase retarder and polarization converter that is controlled by the DC bias.
35 citations
TL;DR: In this paper, the spatial and temporal characteristics of a 128×128 zero-twist nematic liquid-crystal spatial light modulator are investigated for wave-front generation at a wavelength of 632.8??nm.
Abstract: Spatial and temporal characteristics of a 128×128 zero-twist nematic liquid-crystal spatial light modulator are investigated for wave-front generation at a wavelength of 632.8??nm. The modulator is found to have the capability of producing at least eight phase levels between 0 and 2?, and the rate of arbitrary phase modulation is limited to approximately 4.5??Hz. Wave-front generation of the first 55??Zernike polynomials is demonstrated.
35 citations
Patent•
14 May 2012
TL;DR: In this article, a time-resolved single-photon counting two-dimensional imaging system was proposed for color or gray image reconstruction using a compressive sensing algorithm and an imaging spectrum related algorithm.
Abstract: The present invention provides a time-resolved single-photon or ultra-weak light multi-dimensional imaging system and method. In one aspect, to achieve coarse time resolution, the present invention provides a time-resolved single-photon counting two-dimensional imaging system, for forming color or gray images. In another aspect, to achieve high-precision time resolution, the multi-dimensional imaging system provided by the present invention is mainly formed by a light source, an imaging spectrum measuring unit, an electrical detection unit, a system control unit and an algorithm unit. Light carrying object information is imaged on a spatial light modulator and modulated at random according to compressive sensing theory; light emerging from the grating is collected using a single-photon detector or an array of single-photon detectors, and at the same time, the number of photons and the arrival time of photons are recorded. Reconstruction is performed using a compressive sensing algorithm and an imaging spectrum related algorithm. The present invention provides single-photon detection sensitivity, high space/time resolution and a wide spectrum range, and can be widely applied to various new high-tech industries such as single-cell biophysics and material defect inspection.
35 citations