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: This paper demonstrates how to use this technique to characterize the phase shifting properties of a liquid-crystal modulator, and in turn it uses the characterized modulator as the modulation device in the presented phase retrieval method.
Abstract: Recently a phase retrieval method using a movable phase plate as modulator has been proposed [Phys. Rev. A75, 043805 (2007)]. This method is applicable to general complex-valued fields and exhibits rapid convergence and high robustness to noise. In this paper, we demonstrate how to use this technique to characterize the phase shifting properties of a liquid-crystal modulator, and in turn we use the characterized modulator as the modulation device in the presented phase retrieval method. The adoption of a dynamic modulator gives a much more robust and flexible setup.
46 citations
Patent•
22 Jan 1997
TL;DR: In this article, a stack of three reflective layers, each of which selectively reflects different a part of the spectrum of white light to a different region, are used in a display in conjunction with a spatial light modulator, having pixels 104a-c, selectively illuminated by light from the regions.
Abstract: A reflector device has a stack of three reflective layers 100,102,108 each of which selectively reflects different a part of the spectrum of white light 106 to a different region. The respective regions may or may not overlap each other. The layers 100,102,108 may be reflective cholesteric liquid crystal materials, dichroic mirrors or reflective multi-layer interference structures. The layers 100,102,108 may be, planar, curved or formed from several curved surfaces in series (fig.11) and may be mutually inclined. The third layer 108 may be combined with either a black absorber layer (110, fig.5) or a panchromatic layer (112, fig.6). The incoming light may be focused by a plano-convex lens array (116,fig.13). The reflector device may be used in a display in conjunction with a spatial light modulator 104, such as a liquid crystal device, having pixels 104a-c, selectively illuminated by light from the regions.
46 citations
TL;DR: An iterative beam shaping algorithm to simultaneously shape the amplitude and phase of an optical beam is proposed, which is a phase-only distribution which can be conveniently realized with a spatial light modulator or a fabricated diffractive optical element.
Abstract: An iterative beam shaping algorithm is proposed to simultaneously shape the amplitude and phase of an optical beam. The proposed algorithm consists of one input plane and two completely overlapped output planes which refer to the output plane in real space. The two output planes are imposed with both amplitude and phase constraints, and the constrained areas in the two output planes are complementary. As a result, both the amplitude and phase in the entire output plane are controllable and arbitrary target complex amplitudes can be achieved with the proposed algorithm. The computing result of the proposed algorithm is a phase-only distribution which can be conveniently realized with a spatial light modulator or a fabricated diffractive optical element. Both simulations and experiments have verified the high performance of the proposed algorithm.
46 citations
TL;DR: This work demonstrates a transmission of independent signals using individually shaped wavefronts employing a single segmented spatial light modulator for optical phase conjugation regarding each light signal.
Abstract: Multimode fibers are attractive for a variety of applications such as communication engineering and biophotonics. However, a major hurdle for the optical transmission through multimode fibers is the inherent mode mixing. Although an image transmission was successfully accomplished using wavefront shaping, the image information was not transmitted individually for each of the independent pixels. We demonstrate a transmission of independent signals using individually shaped wavefronts employing a single segmented spatial light modulator for optical phase conjugation regarding each light signal. Our findings pave the way towards transferring independent signals through strongly scattering media.
45 citations
Patent•
23 Oct 2008
TL;DR: In this article, a light splitter is used to split an incident beam into two beams; a first spatial light modulator can be arranged in an optical path of a first beam; a second spatial modulator which can be placed in an optic path of the second beam; and a light combiner which combines a beam having passed via the first spatio-temporal modulator, with a beam passing via the second spatial light modulation, each of which has a plurality of optical elements arranged two-dimensional and controlled individually.
Abstract: An illumination optical apparatus has an optical unit. The optical unit has a light splitter to split an incident beam into two beams; a first spatial light modulator which can be arranged in an optical path of a first beam; a second spatial light modulator which can be arranged in an optical path of a second beam; and a light combiner which combines a beam having passed via the first spatial light modulator, with a beam having passed via the second spatial light modulator; each of the first spatial light modulator and the second spatial light modulator has a plurality of optical elements arranged two-dimensionally and controlled individually.
45 citations