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Topic: Spatial light modulator

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	Spatial light modulator having a germanium oxide light shielding layer containing additive material or laminated with ...
		A spatial light modulator as claimed in claim 4, wherein the germanium oxide layer containing at least an additive selected from a group consisting of Cu, Ag, Au, Fe, Co and Ni within 20 at % which is defined as an atomic ratio of the additive to a combination of the additive and germanium.
		Thus, light absorption coefficients (.alpha.) of materials used as the light shielding layer 12 were evaluated by using the light beam having a wavelength of 700 nm which was absorbed least by the materials within a visible wavelength range from 400 nm to 700 nm.
		Thus, the spatial light modulators of the embodiments 1 to 3 and the comparative were obtained by filling the cells with the liquid crystal as the photomodulation layer 10.
	www.freepatentsonline.com /5648861.html (3870 words)

	U.S. Patent: 5209955 - Photoconductive polymer based spatial light modulator - May 11, 1993
		Disclosed is a spatial light modulator of the type associating a layer of liquid crystal (2) with a layer of a photoconductive material (1), the photoconductive material being based on polysilane or polygermane.
		The light transmitted or reflected by an SLM thus undergoes a spatial modulation of its amplitude or its phase.
		An object of the invention is a spatial light modulator associating a layer of liquid crystal with a layer of a photoconductive material, wherein the photoconductive material is based on polysilane or polygermane.
	www.everypatent.com /comp/pat5209955.html (1758 words)

	[No title]
		The spatial light modulator is composed of the electro-optical layer 31 sandwiched between the common electrode 33 and the reflective electrode 35.
		The optical characteristics of the pixels of the spatial light modulator 100 are binary: light from the light source 15 and reflected by the pixel either passes through the analyzer 21 to the user's eye E or does not pass through the analyzer to the user's eye.
		11A, and the spatial light modulator is not illuminated.
	www.omnisterra.com /walker/pdfs.patents/USP6795064.txt (20873 words)

	U.S. Patent: 5072239 - Spatial light modulator exposure unit and method of operation - December 10, 1991
		The actively modulated light is then collected by a lens system and focused through a slit in the base of the unit to form an image at suitable magnification on the drum of the xerographic process unit.
		The axis of the grooves is along the optical axis of the light as it passes from the spatial light modulator to the focusing lens.
		The active light signal from the modulator device to the focusing lens passes down the axis of the bee thorax and is thus not attenuated by the sides of the thorax, as are light rays from extraneous surfaces and unmodulated mirror elements.
	www.everypatent.com /comp/pat5072239.html (13796 words)

	Spatial light modulator having an analog beam for steering light - Patent 5629794
		The present invention is generally related to spatial light modulators for modulating incident light, and more particularly, to a device having a selectively deflectable mirror being supported by at least one hinge for steering incident light in a direction being a function of the degree to which the mirror is deflected.
		SLM's are devices that modulate incident light in a spatial pattern to form a light image corresponding to an electrical or optical input.
		SLM 40 is seen to comprise a generally rectangular reflective aluminum pixel 42 being supported along its mid section by a pair of torsional hinges 44.
	www.freepatentsonline.com /5629794.html (4588 words)

	USC File # 2254 - Spatial Light Modulator
		This patent describes a novel type of spatial light modulator that comprises two flip-chip-bonded substrates, one essentially containing an array of detectors and associated control electronics, and the other an array of optical modulators.
		The modulator array may be configured in either the transmission or reflection mode (or both simultaneously), and to modulate either the amplitude or the phase of the readout illumination, depending on the application envisioned.
		Variants of this hybrid electronic/photonic smart pixel spatial light modulator include provision for multiple detectors within each pixel, as well as multiple modulator elements within each associated pixel, thus allowing for multiple inputs and outputs from each integrated spatial light modulator pixel.
	www.usc.edu /academe/otl/spatial.htm (466 words)

	SLMs act as an instant photographic transparency
		When a second light beam, called the readout beam, passes through the electro-optic layer, the phase of the readout beam is modulated by the varying refractive index of the electro-optic layer.
		The function of the SLM is, in many ways, similar to the function of a photographic transparency in an optical processor, which is to modulate the intensity, amplitude, or phase of light passing through it.
		The illuminating light on the retina was linearly polarized.
	www.spie.org /web/oer/may/may97/slm.html (3711 words)

	Spatial_Light_Modulator
		SLM, or Spatial Light Modulator, is the basis of a new photomask pattern generation technology that is being developed by
		Deep ultraviolet light is reflected off the surface of the SLM to expose photoresist on a photomask blank, forming the pattern of the mask.
		Light reflected off the flexed mirrors is scattered — it cannot pass through and expose the photoresist on the photomask blank.
	www.clarycon.com /spatial_light_mo.html (338 words)

	A one-megapixel reflective spatial light modulator system for holographic storage
		Modeling of the electro-optical properties of LC spatial light modulators in order to optimize the modulator qualities in terms of contrast ratio, polarization conversion, and cell-gap fabrication tolerances has become increasingly important, because all relevant parameters may be varied easily and certain relations may be investigated specifically.
		The SLM horizontal synchronizing signal (H) precedes each SLM data row, the SLM blanking signal (B) appears at the end of the frame buffer, and the SLM vertical sync signal is a full frame-buffer row preceding each frame of SLM data.
		The collimated beam from an argon-ion laser (514 nm) illuminated the SLMs through a polarizing beam-splitting cube, which served as both polarizer and analyzer, and the light transmitted through the analyzer was imaged onto a CCD camera with 1536 x 1024 pixels, a 100% pixel fill factor, and 16-bit gray-scale resolution.
	www.research.ibm.com /journal/rd/423/greier.html (5939 words)

	Vision Through a Liquid-Crystal Spatial Light Modulator
		We evaluated the potential of using a liquid crystal spatial light modulator with 127 elements in an hexagonal array to correct focussing errors of the human eye.
		A HEX-127 (Meadowlark, Inc.) spatial light modulator (SLM) was imaged in the entrance pupil of the eye and programmed to generate refractive power of the same magnitude as the ophthalmic lens but of the opposite sign.
		A lens collimated light from the screen for transmission through an interference filter, a polarizing filter, the SLM, and a 12 mm diameter aperture to mask the active area in the SLM.
	research.opt.indiana.edu /Library/liquidcrystal/liquidcrystal.html (1288 words)

	Spatial light modulator - Wikipedia, the free encyclopedia
		A spatial light modulator (SLM) is an object that imposes some form of spatially-varying modulation on a beam of light.
		Usually when the phrase SLM is used, it means that the transparency can be controlled by a computer.
		The image on an optically addressed spatial light modulator, also known as a light valve, is created and changed by shining light encoded with an image on its front or back surface.
	en.wikipedia.org /wiki/Spatial_light_modulator (568 words)

	Spatial light modulator, spatial light modulator array, and image formation apparatus patent invention (Site not responding. Last check: 2007-10-10)
		A reflection spatial light modulator involves a problem of complicating the configuration of a peripheral optical system because incident light and outgoing light are on the same side relative to the spatial light modulator, and is unsuitable for miniaturization.
		In contrast, a transmission spatial light modulator has the advantage that the configuration of a peripheral optical system becomes simple because incident light and outgoing light are on opposite sides relative to the spatial light modulator.
		[0013] According to the invention, there is provided the spatial light modulator, wherein the deformable member is a planar member, the spatial light modulator further comprising a hinge part that supports the deformable member rotatably in a direction in which the electrostatic force acts.
	www.freshpatents.com /Spatial-light-modulator-spatial-light-modulator-array-and-image-formation-apparatus-dt20050908ptan20050195461.php (938 words)

	SLM - Service Level Management, Spatial Light Modulator
		SLM is a acronym that can contains many meanings which are listed below.
		There may be many popular meanings for SLM with the most popular definition being that of Service Level Management, Spatial Light Modulator
		SLM is also derived from Spatial Light Modulator
	www.auditmypc.com /acronym/SLM.asp (208 words)

	[No title]
		Light from the AOM is collimated by lens L2 and illuminates the SLM under test and subsequently forms an image at the output CCD plane using lenses L3 and L4.
		The spatial filter at the focal plane of lens L3 blocks all higher-order diffracted beams originating from the grid structure of the SLM and passes only the 0-th order diffracted beam.
		To accurately synchronize light pulses with SLM images, a precise timing relationship must be maintained between the pulse applied to the AOM and the video signal.
	www.itl.nist.gov /lab/nistirs/itl-slm.doc (1597 words)

	CommsDesign - Improving DWDM Performance with Optical Signal Processing
		As the name implies, a spatial light modulator is a device capable of modulating the amplitude, direction, and phase of a beam of light within the active area of the modulator.
		A pixelated spatial light modulator is comprised of a mosaic of discrete elements on which a beam of light is spread and can be constructed as a transmissive or reflective device.
		Since the modulator is a highly parallel 1x2 switch, this implementation uses one mirror state as a pass (express) channel and the other position as a drop or add channel.
	www.commsdesign.com /design_library/cd/on/OEG20021028S0025 (2225 words)

	SLM technology
		SLM, or spatial light modulator, is the basis of a new photomask pattern generation technology that is fundamentally different from current production technologies.
		SLM technology unites laser productivity with e-beam´s high-resolution, creating a powerful photomask pattern generator with the potential to extend through many generations of technology.
		light is reflected off the surface of the SLM to expose photoresist on a photomask blank, forming the pattern of the mask.
	www.micronic.se /site_eng/product/slmtechnology.shtml (195 words)

	The UB Physical Optics Research Group
		Unfortunately, liquid crystal SLMs are notoriously unable to modulate the whole unit circle in complex space, that is, they are incapable of modifying both phase and amplitude of the incoming wavefront on an independent basis.
		The algorithm divides the spatial light modulator into as many subdomains, Ik, as traps are required so that these subdomains do not overlap and jointly cover the whole modulator area.
		Depending on the polarization state of the input light and on the polarizing elements placed after the display, different modulation operating curves are obtained (one for each configuration).
	www.ub.es /optics/tweezers.html (1075 words)

	High-Speed Optical Image Compression at Lower Power
		Because the spatial light modulator would not be needed in the alternative method, the power consumption of the image-compression system could be greatly reduced.
		Different magnifications would be used along the clockwise and counterclockwise circuits of the interferometer, in order to make each point in the image interfere with itself; this design would eliminate the need for a spatial light modulator and lasers to obtain the coherence needed to generate a hologram.
		Light coming from different points in the Fourier-transform plane would be superimposed incoherently on the detector plane.
	www.nasatech.com /Briefs/Apr01/NPO20639.html (585 words)

	Apparatus for printing high resolution images using reflective LCD modulators - US Patent 6801238 (Site not responding. Last check: 2007-10-10)
		A prism (370) is located at a first position and receives the uniform area light and refracts the light.
		A first reflective LCD modulator (90) modulates the refracted light on a site by site basis and reflects the first modulated light to a second position on a media plane.
		A second reflective LCD modulator (95) modulates the refracted light on a site by site basis and reflects the second modulated light to a fourth position on the media plane.
	www.patentstorm.us /patents/6801238.html (289 words)

	Spatial light modulator (US4705361) (Site not responding. Last check: 2007-10-10)
		A light modulator and a high speed spatial light modulator (230) with each pixel (231) made of stacked quarter wavelength layers (232, 234) of heterogeneous material.
		Also, a modulator invoking the Burstein effect in the form of a stack of p-n diodes is disclosed.
		(b) at least one electrode for injecting or withdrawing carriers from said ground levels in said wells, whereby light is absorbed by excitation of carriers in said ground levels to higher levels and light transmitted by a depletion of carriers from said ground levels.
	www.delphion.com /details?pn10=US04705361 (262 words)

	Pattern Formation Lab - W Losert - University of Maryland (Site not responding. Last check: 2007-10-10)
		Its key part is a spatial light modulator that can shape an incoming laser beam into an arbitrary shape – such as an array of laser spots (see Fig).
		For experiments on microstructure control, the microstructures will be perturbed locally through the laser light field, since the laser can locally heat the material, crosslink a polymer, uncage a protein, or otherwise alter the local properties of the material.
		It is possible to adapt the perturbation shape in response to observed microstructures, since the pattern generated by the spatial light modulator can be changed at a rate of up to 30 Hz.
	www.ireap.umd.edu /granular/tweezer_array (243 words)

	Spatial Light Modulators
		Spatial light modulators (SLMs) play an important role in several technical areas where the control of light on a pixel-by-pixel basis is a key element, such as optical data processing, adaptive optics, optical correlation, machine vision, image processing and analysis, beam steering, holographic data storage, and displays.
		SLMs of all varieties continue to have a significant impact on the photonics community.
		The goal of this conference is to address the current status of spatial light modulator technology.
	www.spie.org /web/meetings/calls/pw98/pw98call_oe21.html (233 words)

	Spatial Light Modulator (SLM) -Technology
		These systems are suitable for almost any optical system, starting from imaging applications using white light and coherent light sources up to the utilisation as an addressable optical element.
		The highest potential of Spatial Light Modulators is the use as a dynamic phase modulating device, which acts as an addressable diffractive element.
		Furthermore, a tailored Spatial Light Modulator application software allows the simple generation of diverse dynamic optical functions like gratings, lenses, axicons and apertures as well as the calculation of diffractive optical elements (DOE) from user defined images.
	www.holoeye.com /spatial_light_modulators-technology.html?source=google&campaign=slm (473 words)

	oe magazine - eye on technology (Site not responding. Last check: 2007-10-10)
		The high spatial resolu-tion occurs because laser pulses can be focused tightly in a transparent material, at which point multiphoton absorp-tion, optical field ionization, and a corresponding Coulomb explosion can occur in a submicrometer-sized location.
		The LCSLM consists of a parallel-aligned nematic liquid-crystal spatial light modulator coupled with a liquid-crystal display and a 680-nm laser diode.
		Information in the light pulses has to be converted back into cumbersome electrical signals before the signals can be sorted and redirected to their proper destinations.
	oemagazine.com /fromthemagazine/nov05/eyeontech.html (2321 words)

	New liquid crystal microdisplays permit phase-only light modulation
		Their operation is based on the rotation of the incident light's polarization, caused by voltages to the LC cells.
		However, is not possible to eliminate the remaining effects on the amplitude of the light.
		The measurement of the Stokes parameters (a set of parameters for specifying phase and polarization of radiation) for the modulated light shows that the linear polarization of the incident light is preserved.
	newsroom.spie.org /x3614.xml (964 words)

	Spatial light modulator drive system (US4638309)
		The spatial light modulator drive system of the present invention permits useful light modulation, such as employed in a projection display device, with a minimum of required data input.
		A plurality of charge storage cells with associated charge dependent light modulator cells are disposed at the intersection of row and column conductors.
		The starting column for application of new display data enables this new data to be entered into the desired portion of the column latch for application to the desired light modulator cells.
	www.delphion.com /details?pn10=US04638309 (638 words)

	Spatial Light Modulator Displays Another Dimension
		Act Research followed a different approach, modulating light from a metal halide lamp to flash successive picture frames on a rotating two-dimensional screen.
		Tsao was attracted to Displaytech's spatial light modulator for its high frame rate.
		Tsao explored other liquid crystal modulators but found that their frame rates were too slow.
	www.photonics.com /content/spectra/1999/October/applications/65580.aspx (559 words)

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