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.

Apparatus and method for production of three-dimensional models by spatial light modulator

Abstract: An apparatus and the method of its operation for rapid prototyping of a three-dimensional object which includes a radiant energy source of a wide beam of radiant energy of suitable intensity and wavelength for curing a layer of photo-curable resin contained in an open vat, a spatial light modulator (SLM) having an array of pixel elements which are individually digitally controllable by a computer, for modulating the radiant energy beam projected from the radiant energy source on a pixel by pixel basis, to form a series of time sequential images of the cross-sectional laminae of the object, an optical system for focusing each image formed by the SLM, one at a time, onto successive layers of photo-curable resin for predetermined exposure times to thereby form stacked laminae of cured resin, each lamina of cured resin being in the shape of a different one of the cross-sectional laminae, and a piston support for lowering each lamina of cured resin after it is formed by the SLM and for depositing a layer of resin corresponding to the thickness of one cross sectional lamina of the three-dimensional object before the step of projecting a new image by the SLM. The SLM, the piston support for lowering, and the optical system operate repeatedly and sequentially until a complete copy of the object is thereby produced.

Projection system and method

Abstract: An image projection system and method are presented to project an image on at least one of first and second projection planes. The system comprises a light source system (102) including one or more light source assemblies operable to generate light of one or more predetermined wavelength range; a spatial light modulator (SLM) system (104) including one or more SLM units operable to spatially modulate input light in accordance with an image to be directly projected or viewed; and two optical assemblies (106) associated with two spatially separated light propagation channels, respectively, to direct light to, respectively, the first and second projection planes with desired image magnification (108A, 108B). The system is configured to selectively direct the input light propagating towards the SLM system or light modulated by the SLM system to propagate along at least one of the two channels associated with the first and second projection planes, respectively.

High resolution image projection system and method employing lasers

Abstract: An image projection system employing microlaser and/or diode laser arrays (11). Each laser in each array is individually addressable. The system includes three linear laser arrays, one red (12), one green (13), and one blue (14), each individually addressable laser being powered and modulated in accordance with the input image signal (21). When microlaser arrays, which are energized by laser diode pumps, are used, the laser diode pumps are formed in equivalent arrays (15, 16, 17). The laser output beams are combined in a dichroic prism (31) and reflected off a rotating multifaceted scanning mirror (22) which effects two dimensional scanning as it rotates. The image beam reflected from the scanner passes through an imaging lens (24), a speckle eliminator (25) and then onto the projection screen (27). The invention also includes the method of generating and scanning the image beam, as well as the novel speckle eliminator and the microlaser array configured for optimally close spacing to achieve the desired result. In one embodiment, the laser diode pumps are directly modulated by the video signal, while in another embodiment the microlaser outputs are modulated utilizing a spatial light modulator array.

Physical key-protected one time pad

Abstract: A device, including one or more Communication Physical Unclonable Function (CPUF) and key storage devices, the CPUF devices each comprising: a coherent Electromagnetic (EM) radiation source; a spatial light modulator (SLM) connected to the coherent EM radiation source; a volumetric scattering medium connected to the SLM; a detector connected to the volumetric scattering medium; and one or more processors or circuits connected to the detector and one or more processors or circuits connected to the SLM. A communication protocol is also provided.

Spatial light modulator printer and method of operation

Abstract: A printing system and method which uses an unmodulated light focused on a spatial light modulator (SLM) device. The light modulator device, in one embodiment, can be a deformable set of mirrors monolithically integrated onto a semiconductor substrate which act, under control of data signals, to selectively modulate light onto a focusing lens which in turn images the light to the drum of the xerographic printing process. The deformable mirrors are formed in one or more parallel rows and the selective timing of the rows is controllable in order to compensate for variations in xerographic process speed. A stepped light baffle removes the unmodulated light further enhancing the dark field effect.