533 results about "Spatial light modulation" patented technology

Exemplary embodiment can utilize the properties of tunable thin-film, material (e.g., graphene) to efficiently modulate the intensity, phase, and / or polarization of transmitted and / or reflected radiation, including mid-infrared (“mid-IR”) radiation. Exemplary embodiments include planar antennas comprising tunable thin-film material sections and metallic sections disposed in contact with the tunable thin-film material sections, each metallic section having a gap with at least one dimension related to a wavelength of the radiation, which in some embodiments may be less than the wavelength. The metallic layer may comprise rods arrange in one or more shapes, or one or more apertures of one or more shapes. Embodiments of the antenna may also comprise a substrate, which may be a semiconductor or conductor in various embodiments. Embodiments also include systems, computer-implemented methods, devices, and computer-readable media for effectuating desired modulation of incident radiation by, e.g., varying the doping level of the tunable thin-film material.

The present invention provides a projection display comprising an illumination system comprising at least one laser source unit and configured and operable for producing one or more light beams; a spatial light modulating (SLM) system accommodated at output of the illumination system and comprising one or more SLM units for modulating light incident thereon in accordance with image data; and a light projection optics for imaging modulated light onto a projection surface. The illumination system comprises at least one beam shaping unit comprising a Dual Micro-lens Array (DMLA) arrangement formed by front and rear micro-lens arrays (MLA) located in front and rear parallel planes spaced-apart along an optical path of light propagating towards the SLM unit, the DMLA arrangement being configured such that each lenslet of the DMLA directs light incident thereon onto the entire active surface of the SLM unit, each lenslet having a geometrical aspect ratio corresponding to an aspect ratio of said active surface of the SLM unit.

Improved apparatus and methods for spatial light modulation are disclosed which utilize optical cavities having both front and rear reflective surfaces. Light-transmissive regions are formed in the front reflective surface for spatially modulating light.

A 2-dimensional beam scan unit (2) reflects emission beams from a red laser light source (1a), a green laser light source (1b) and a blue laser light source (1c) and scans in a 2-dimensional direction. Diffusion plates (3a, 3b, 3c) diffuse the respective light beams scanned in the 2-dimensional direction to introduce them to corresponding spatial light modulation elements (5a, 5b, 5c). The respective spatial light modulation elements (5a, 5b, 5c) modulate the respective lights in accordance with video signals of the respective colors. A dichroic prism (6) multiplexes the lights of the three colors after the modulation and introduces the multiplexed lights to a projection lens (7) so that a color image is displayed on a screen (8). Since the 2-dimensional light emitted from the beam scan unit is diffused to illuminate the spatial light modulation element, it is possible to change the optical axis of the beam emerging from the light diffusion member for irradiating the spatial light modulation element moment by moment, thereby effectively suppressing speckle noise.

The invention relates to a rear-projecting device including a light guide for distribution of light from a light source to a light projecting area, a spatial light modulating arrangement, the light modulating arrangement is arranged in relation to the light-projecting area such that the arrangement illuminates a sub-area of the light-projecting area, the light projection area is at least partly transparent.

There is provided An image projection apparatus comprising: a spatial light modulation element that modulates illumination light by switching the display and non-display statuses of the respective pixels based on pulse width modulation driving to perform gradation expression for each pixel; a light source section able to increase and decrease the amount of illumination light output according to an input controlled variable; a light source control section that periodically controls the light amount of the illumination light output from the light source section; and a projection optical section that projects images modulated by the spatial light modulation element, wherein the light source control section selectively controls the light amount of the illumination light output from the light source section by either one of a first mode in which the controlled variable is changed in a first control period that is shorter than the display period for the spatial light modulation element to display the input image information, and a second mode in which the controlled variable is changed in a second control period that is longer than the first control period.

The present invention is directed to a transmission type laminated hologram optical element constituting an image display apparatus, wherein plural transmission type hologram optical elements (13), (14), (15) where diffraction acceptance incident angles are different from each other are laminated. The respective transmission type hologram optical elements are adapted so that outgoing angles with respect to center incident angles of respective diffraction acceptance incident angles at an arbitrary wavelength of the visible region are different from each other, whereby a diffraction acceptance angle of incident light can be broadened, light utilization efficiency is permitted to be high, and distance with respect to color pixels of the spatial light modulation element can be optimally set from viewpoints of light utilization efficiency.

A gemstone micro-inscription system, comprising an energy source, a spatial light modulator, and a control, the control controlling a spatial light pattern modulation of the spatial light modulator, wherein the spatial light modulator exposes a photoresist on the gemstone, which selectively impedes an etching process to produce a pattern on the gemstone corresponding to the spatial light modulation pattern.

A two-dimensional light-modulating fine aperture array apparatus includes a spatial light-modulating unit for adjusting quantity of incident light by using a plurality of light amount adjusting cells (liquid crystal cells or micromirrors) arrayed in matrix form, a two-dimensional microlens array having microlenses which focus light beams passing through the light quantity adjusting cells, and a highly efficient two-dimensional fine aperture array. The light is emitted through the fine apertures by connecting the two-dimensional light-modulating fine aperture array apparatus with a light source unit. A scanning unit moves in the x and y directions to perform a scanning process on a surface of a recording medium by using the light emitted from the apertures.

A holographic display and more particularly an apparatus and method for a curved electro-holographic display are disclosed. The apparatus mainly includes at least one light source for providing lights, at least one axially symmetric mirror for reflecting the lights coming from the light source, at least one spatial light modulation system having one or more than one spatial light modulators for modulating the lights reflecting from the axially symmetric mirror and forming a desired optical reconstruction above the axially symmetric mirror by reflecting the lights which is seen from a viewing zone by the user.

Improved apparatus and methods for spatial light modulation are disclosed which utilize optical cavities having both front and rear reflective surfaces. Light-transmissive regions are formed in the front reflective surface for spatially modulating light.

An optical information recording device, a reproduction device, and a method enabling include a first spatial light modulator I for generating information light by spatially modulating light from a light source 143 by a plurality of pixels and a second spatial light modulator R for generating reference light by spatially modulating light from a light source by a plurality of pixels. The area I of the information light and the area R of the reference light on the entrance pupil surface of an objective lens 111 are formed such that one area surrounds the other area. The reference light is spatially modulated by the second spatial light modulator R such that interference is not easily generated between the reference lights in the information recording layer 3.

The present invention provides a projection display comprising an illumination system comprising at least one laser source unit and configured and operable for producing one or more light beams; a spatial light modulating (SLM) system accommodated at output of the illumination system and comprising one or more SLM units for modulating light incident thereon in accordance with image data; and a light projection optics for imaging modulated light onto a projection surface. The illumination system comprises at least one beam shaping unit comprising a Dual Micro-lens Array (DMLA) arrangement formed by front and rear micro-lens arrays (MLA) located in front and rear parallel planes spaced-apart along an optical path of light propagating towards the SLM unit, the DMLA arrangement being configured such that each lenslet of the DMLA directs light incident thereon onto the entire active surface of the SLM unit, each lenslet having a geometrical aspect ratio corresponding to an aspect ratio of said active surface of the SLM unit.

Miniaturization is realized and high-output lights are obtained by optimizing the arrangement of a laser light source unit and a homogenizer.A laser light source unit 1 has a light emission region for emitting an elliptical laser light. A focusing lens unit 2 focuses the laser light emitted from the laser light source unit 1. A rod integrator 4 has a rectangular incident surface on luminous flux focused by the focusing lens unit 2. A spatial light modulation element 7 modulates the laser light emitted from the rod integrator 4. A projection lens 8 projects the laser light modulated by the spatial light modulation element 7. The incident surface of the rod integrator 4 has a rectangular shape, and the laser light source unit 1 is arranged such that a longer axis direction of the light emission region and a longer side direction of the incident surface of the rod integrator are parallel.

Provided is a holographic display that realizes a high-resolution three-dimensional (3D) image as a spatial light modulation panel system having a fast response time and enabling the formation of high-density pixels is developed. The holographic display includes, a spatial light modulator using a polymer thin film or a dielectric thin film that enable the formation of high-density pixels and has a fast response time, a fine displacement panel system sequentially moving the spatial light modulator in synchronization with a hologram fringe signal, and an optical system including a coherent light source, a spatial light modulation panel system, and an optical element that are efficiently disposed. The holographic display has a feature that realizes a high-resolution 3D image in a scheme that integrates and displays an image while sequentially moving a spatial light modulator simply or overlaps a hologram fringe pattern.

The invention discloses a head up display device based on laser holographic projection imaging, and the head up display device based on laser holographic projection imaging belongs to the field of auxiliary display. The head up display device based on laser holographic projection imaging mainly comprises a light source system, an image processing system, a spatial light modulation module and an optical light path system. First, the image processing system receives to-be-displayed content through a data interface and transforms the content into a hologram form through a hologram conversion algorithm, or selects the to-be-displayed hologram stored in the system to perform simple arithmetic processing according to external inputted information, or directly outputs and displays on the spatial light modulation module; second, one (monochromatic) or a plurality of (chromatic) laser beams are emitted on the spatial light modulation module, and an original image is formed through diffraction in front of the spatial light modulation module; and last, the optical light path system is used for magnifying the imaged restored through diffraction to increase the field angle of the image. The head up display device based on laser holographic projection imaging can realize real-time dynamic adjustment of imaging distance, and the brightness of the displayed content can be changed in real time according to the ratio of the projection content area to the total projection area.

A method and apparatus is provided for writing a code on an optical element, wherein the code is written on the optical element in the form of a holographic image of an n-dimensional code generated by an interference pattern between a reference beam and a signal beam reflected off a spatial light modulation device having the n-dimensional code configured thereon. The method includes steps of generating the interference pattern between the reference beam and the signal beam reflected off the spatial light modulation device having the n-dimensional code thereon; as well as writing the interference pattern on the optical element as a holographic image of the n-dimensional code.

Red, green, and blue laser light emitted from laser light sources 1-3 is transformed into substantially parallel beams by collimator lenses 4-6, collected by microlens arrays 7-9, and rendered uniform by rod integrators 10-12, whereupon it is used to illuminate spatial light modulation elements 16-18 and subjected to modulation. The modulated laser light exiting from the spatial light modulation elements 16-18 is recombined using a beam-combining prism 19 and subjected to pixel separation using a birefringent plate 20, which is rotationally driven by a birefringent plate rotary drive unit 26, after which it is projected upon a screen 22 using a projection optical system 21. The birefringent plate 20 spatially separates the modulated laser light using birefringence. When pixels are spatially separated by the birefringent plate, the pixel grid region is made smaller, the distribution of brightness on the screen is rendered uniform, and speckle noise is reduced.

A two dimensional image forming device includes: a laser light source (1) which is a coherent light source; a prism array (2) that changes the traveling direction of a beam exiting from the laser light source (1); a driving portion (3) that rotates the prism array (2); a rod integrator (4) that guides the exiting beam deflected on the prism array (2) while allowing the beam to undergo internal reflection; a projection optical system (5) that projects the exiting end face of the rod, integrator (4) onto a two dimensional spatial light modulation element (7); and a projection lens (8) that projects light exiting from the two dimensional spatial light modulation element (7) onto a specific plane within a space.

A display device having a display panel for displaying an image by spatial light modulation includes a plurality of pixel groups, each pixel group including a first pixel having a first type of luminance against viewing angle response, and a second pixel having a second type of luminance against viewing angle response, wherein the first and second luminance against viewing angle responses are different from one another. The display device further includes a controller operatively coupled to each of the plurality of pixel groups, wherein the controller is configured to drive each of the plurality of pixel groups such that on average the plurality of pixel groups simultaneously provide a predetermined on-axis luminance and an predetermined off-axis luminance for a region of the image corresponding to each pixel group.

Spatial Light Modulator (SLM) microscopy can customize a sample illumination pattern from the microscope to simultaneously interrogate multiple targets localized within the sample. An exemplary SLM microscope arrangement can be used to image target locations at, e.g., arbitrary 3D coordinate by using, e.g., an extended Depth-of-Field computational imaging system. Multi-site three-dimensional targeting and sensing can be used in both transparent and scattering media. To that end, exemplary embodiments of system, method and computer-accessible medium can be provided for generating at least one image of at least one portion of a sample. For example, a computer hardware arrangement corn be provided. Such exemplary arrangement can be configured to receive information related to light, modified by the sample, after being previously manipulated by a optical addressing (e.g., diffraction) arrangement. Such exemplary computer hardware arrangement can also generate the image(s) based on the information.

When an image of a two-dimensional pattern is formed on a photosensitive material by performing spatial light modulation on light emitted from a light source by a spatial light modulation means including a multiplicity of arranged pixel units and by forming an image by a second imaging optical system after forming an image of each of light beams corresponding to the pixel units, on which the spatial light modulation has been performed, by a first imaging optical system, the imaging position of each of light beams is controlled separately for each of the light beams. Accordingly, the image of the two-dimensional pattern formed on the photosensitive material coincides with an intended two-dimensional pattern.

An optical control system receives an incident light wave containing a plurality of wavelength components and is capable of giving different spatial light intensity distributions respectively to the wavelength components and of easily changing the color characteristic of an outgoing light wave. The optical control system is applied to illumination systems and light sources for displays, and to a method and an apparatus for process control using such modulated light. The optical control system receives a linearly polarized light wave as an incident light wave 1 containing a plurality of wavelength components, gives different polarization plane rotation angles respectively to the wavelength components by a wavelength dispersion azimuth rotator 3, gives the plane of polarization of the incident light wave 1 an optional optical rotation angle spatial distribution by a spatial light modulator 5, and emit an outgoing light wave containing wavelength components respectively having different spatial light intensity distributions by an analyzer 7.

According to the present invention, there is provided an image display device including a non-luminous reflection type spatial light modulating element, illuminating system to illuminate the reflection type spatial light modulating element and a projection lens and in which light from a light source (2) illuminates the reflection type spatial light modulating elements (14, 15) via first and second fly-eye integrators (9, 10). An unnecessary part, not modulated, of the light reflected by the reflection spatial light modulating elements (14, 15) and further by a reflector (4) for recycling. Since the fly-eye integrators (9, 10) are displaced in relation to their optical axes, it is possible to utilize the light with an improved efficiency and prevent any nonuniform illumination from taking place.

The invention provides a model-free wavefront distortion correcting system based on a spatial light modulator. The system consist of a polarizing sheet 1, a telescopic system 2, a beam splitter prism 3, a shrinkage device 4, a CCD camera 5, a computer system 6, the spatial light modulator 7, a wavefront controller 8 and a monitoring camera 9. The common CCD camera is adopted to form images; a Strehl ratio of beams is analyzed according to the model-free iteration theory to obtain control signals of optimization parameters required by a wavefront corrector; the performance indexes of the system such as imaging definition, receiving light energy and the like are directly used as objective functions of an optimization algorithm to optimize and acquire the correction effect close to a diffraction limit; and the optimization parameters are calculated in parallel by a computer with a graph processor, the acquired multi-channel control signals are transmitted to the wavefront controller, and then the wavefront controller drives the spatial light modulator to achieve real-time correction of wavefront distortion phase so as to effectively solve the problem of wavefront distortion in atmospheric laser communication.