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467 results about "Selective reflection" patented technology
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Definition of selective reflection. : the reflection emitted by a surface that reflects waves of different lengths with varying intensity.
Near-eye display with on-axis symmetry
ActiveUS8376548B2Mitigate issueEffective overlapProjectorsNon-linear opticsSelective reflectionEye closure
Owner:VUZIX
Near-eye display with on-axis symmetry
ActiveUS20120069413A1Mitigate issueEffective overlapProjectorsNon-linear opticsSelective reflectionDisplay device
A near-eye display projects virtual images from an image generator to an eyebox within which the virtual images can be seen by a viewer. A first optical path conveys image-bearing light from the image generator to a selectively reflective powered optic and a second optical path conveys the image-bearing light along a line of sight from the selectively reflective powered optic to the eyebox. First and second selectively reflective surfaces fold the first optical path with respect to the second optical path to locate the image generator out of the line of sight to the eyebox. The image generator is effectively inclined to the line of sight to the eyebox for reducing a thickness of the near-eye display. The selectively reflective powered optic is oriented normal to local overlapping portions of the first and second optical paths at the selectively reflective powered optic.
Owner:VUZIX
Electro-optic displays
ActiveUS20120293858A1Rule out the possibilityNon-linear opticsOptical elementsCatoptricsSelective reflection
A wavelength selective reflection display (10) comprises a wavelength selective reflection medium (20) and a backing member (30) having a first, non-reflective optical state, and a second, reflective optical state. Both the wavelength selective reflection medium (20) and the backing member (30) are divided into pixels (40, 50, 60), and the backing member (30) is switchable between its first and second optical states on a pixel-by-pixel basis. The pixels of the backing member (30) are substantially aligned with those of the wavelength selective reflection medium (20).
Owner:E INK CORPORATION
Ureter detection using waveband-selective imaging
Selective reflection of light by ureters and by tissue around the ureters is used to safely and efficiently image the ureters. In one aspect, a plurality of surgical site scenes is captured. Each of the plurality of surgical site scenes is captured from reflected light having a different light spectrum. The plurality of captured surgical site scenes is analyzed to identify ureter tissue in the captured surgical site scenes. A surgical site scene is displayed on a display device. The displayed surgical site scene has ureter tissue artificially highlighted.
Owner:INTUITIVE SURGICAL OPERATIONS INC
Optical beam transformation system and illumination system comprising an optical beam transformation system
ActiveUS20060146384A1Reduction in polarization-varying effectPhotomechanical apparatusPhotographic printingOptical axisSelective reflection
Owner:CARL ZEISS SMT GMBH
Methods for Fabricating Thermochromic Filters
InactiveUS20100045924A1Easy and less-expensive to manufactureEasy to installSolar heating energySolar heat collector controllersSelective reflectionElectrical polarity
Thermochromic liquid crystal filters are fabricated by providing two polarizers oriented at offset polarity with respect to each other; providing alignment structures adjacent the inner surfaces of the polarizers; placing a plurality of spacers between the polarizers; and filling a space created by the spacers with a thermotropic liquid crystal that acts as a wave block in an isotropic state and acts as a depolarizer in a nematic state. Alternatively, the filters can be created by encapsulating a thermochromic liquid crystal with a polymer material to form a flexible film and orienting the thermochromic liquid crystal in the polymer material to create a structure that functions as a thermochromic optical filter. Such filters can control the flow of light and radiant heat through selective reflection, transmission, absorption, and / or re-emission. The filters have particular application in passive or active light-regulating and temperature-regulating films, materials, and devices, and particularly as construction materials.
Owner:RAVENBRICK
Combining outputs of different light sources
InactiveUS20080074752A1Point-like light sourceColor television detailsSelective reflectionLight beam
An embodiment of an optical manifold has first and second collimators, each arranged to receive light from a source and transmit the light to an exit port of the collimator, and a separator arranged to emit some of the light from the exit ports of the first and second collimators and to recycle some of the light into the collimators. Another embodiment has at least three collimators of substantially equal length and having central axes, respective light sources at entry ports of the collimators, the collimators being arranged with their central axes parallel and with their light sources in a common plane and reflectors positioned to direct light from exit ports of the collimators to a selectively reflective component that guides all the light into a common exit beam.
Owner:LIGHT PRESCRIPTIONS INNOVATORS
Head-up display
Methods and apparatus are provided for a combined image on a head-up display. A data image display provides a first part of a combined image. An optical input provides a second part of the combined image, e.g., the background scene. A combiner superimposes the first and second parts to provide the combined image to the viewer. The data image display preferentially delivers s-polarized light to the combiner, which has a selective reflectance region for preferentially reflecting s-polarized light in a wavelength region of interest. In a preferred embodiment, the data image display comprises a backlight, a liquid crystal layer and two polarizers oriented so that the data images directed toward the combiner are s-polarized with respect to the selective reflectance region. A polarization rotation element may also be used in the data image display to facilitate s-polarization orientation.
Owner:HONEYWELL INT INC
Thermally Switched Optical Filter Incorporating a Guest-Host Architecture
InactiveUS20100259698A1Avoid concentrationLess transmissiveLiquid crystal compositionsStatic indicating devicesLiquid crystallineSelective reflection
Thermochromic filters are constructed using absorptive, reflective, or fluorescent dyes, molecules, polymers, particles, rods, or other orientation-dependent colorants that have their orientation, order, or director influenced by carrier materials, which are themselves influenced by temperature. These order-influencing carrier materials include thermotropic liquid crystals, which provide orientation to dyes and polymers in a Guest-Host system in the liquid-crystalline state at lower temperatures, but do not provide such order in the isotropic state at higher temperatures. The varying degree to which the absorptive, reflective, or fluorescent particles interact with light in the two states can be exploited to make many varieties of thermochromic filters. Thermochromic filters can control the flow of light and radiant heat through selective reflection, transmission, absorption, and / or re-emission. The filters have particular application in passive or active light-regulating and temperature-regulating films, materials, and devices, and particularly as construction materials and building and vehicle surfaces.
Owner:RAVENBRICK
Compact virtual display
InactiveUS20090322653A1Small sizeReduce weightPolarising elementsCathode-ray tube indicatorsComputer graphics (images)Selective reflection
Provided is a compact virtual display in which an image displayed on an image display device is separated into a plurality of regions, selectively reflected in an image receiving optical system, and selectively transmitted in synchronization with the selective reflection of the image receiving optical system.
Owner:SAMSUNG ELECTRONICS CO LTD
Infrared region selective reflection coat and infrared region selective reflection film
An infrared region selective reflection coat, having a layer exhibiting a structural color of which a central wavelength of a selective reflection band is in the range of 700 nm to 2,000 nm,wherein the infrared range selective reflection coat satisfies at least one of the following requirements A and B:A: the layer exhibiting a structural color contains a compound having a light-sensitive functional group; andB: the infrared range selective reflection coat further comprises a layer containing an infrared-absorbing dye or pigment having absorption maximum in the range of 700 nm to 2,000 nm and a half bandwidth of its absorption band in the range of 20 nm to 200 nm.
Owner:FUJIFILM CORP
Optical beam transformation system and illumination system comprising an optical beam transformation system
ActiveUS7511886B2Reduce impactPhotomechanical apparatusPolarising elementsOptical axisSelective reflection
Owner:CARL ZEISS SMT GMBH
Infrared selective reflective polarizing element
InactiveUS6185039B1Maximum transmissionMinimal transmissionLight protection screensPolarising elementsIn planeSelective reflection
The present invention provides light valves including polarizing elements in which light transmission can be controlled by rotating at least one of the polarizing elements about an in-plane axis. Although reflective polarizing elements are preferred in devices according to the present invention to reduce the problem of heat build-up, the use of absorptive or other polarizers may also be envisioned. The polarizing elements may also include at least one reflective polarizer in combination with an infrared reflective material or an infrared absorptive material. The polarizing elements can be included in light valves to control light transmission by rotating at least one of the polarizing elements about an in-plane axis. The light valves according to the present invention may find use in any application in which the transmission of light (visible or otherwise) is to be controlled. Examples of specific applications include, but are not limited to: windows, luminaires, skylights, etc.
Owner:3M INNOVATIVE PROPERTIES CO
Polarizer, polarization light source and image displayunit using them
InactiveUS20050151896A1Effective reflectionSolid-state devicesPolarising elementsSelective reflectionLight beam
A polarization component, capable of efficiently reflecting an obliquely transmitted light beam toward a light source without degrading the transmission-polarization property of a perpendicular incident light beam, is provided. A C-plate having an oblique retardation of at least λ / 8 with respect to a light beam inclined by at least 30° is disposed between at least two reflective circular polarizer layers whose selective reflection wavelength bands of polarized light overlapping each other. A combination of a reflective linear polarizer and a quarter wavelength plate may be used instead of the reflective circular polarizer. Alternatively, a combination of two reflective linear polarizer layers and two quarter wavelength plate layers (Nz≧2) disposed therebetween can provide a similar effect. Further, a combination of two reflective linear polarizer layers and a half wavelength plate (Nz≧1.5) disposed therebetween may be used.
Owner:NITTO DENKO CORP
Thin film transistor panel and liquid crystal display using the same
The invention discloses an LCD device, which comprises: a transmissive LCD panel assembly; a backlight assembly for providing light to the LCD panel assembly; a selective reflection film arranged between the backlight assembly and the LCD panel assembly. A display area of the LCD has a low-resolution area and a high-resolution area, and pixels formed in the low-resolution area are larger than pixels formed in the high-resolution area.
Owner:SAMSUNG DISPLAY CO LTD
Optical device, light-condensing backlight system, and liquid crystal display
InactiveUS20060238867A1Effective reflectionIncrease brightnessLiquid crystal compositionsPolarising elementsLiquid-crystal displayAngle of incidence
An optical element of the invention comprises at least three laminated circular-polarization-type-reflection polarizers (a) whose wavelength bands for selective reflection of polarized light overlap one another; a layer (b1) which is placed between at least a pair of the circular-polarization-type-reflection polarizers (a) and has a front retardation of substantially zero (in the normal direction) and a retardation of at least λ / 8 with respect to incident light inclined by at least 30° relative to the normal direction; and a layer (b2) which is placed between at least another pair of the circular-polarization-type-reflection polarizers (a) and has a front retardation of substantially zero (in the normal direction) and a retardation of at most μ / 2 with respect to incident light inclined by 60° relative to the normal direction. The optical element condenses or collimates incident light from a light source and can control transmission of light at large incident angles relative to the normal direction, increase front brightness and reduce coloration.
Owner:NITTO DENKO CORP
Selective reflectivity process chamber with customized wavelength response and method
InactiveUS7115837B2Drying solid materials with heatMuffle furnacesSpectral responseSelective reflection
Owner:MATTSON TECHNOLOGY +1
Optical element, window material, fitting, solar shading device, and building
ActiveUS20140293436A1Suppress generationMirrorsLight protection screensSelective reflectionLength wave
An optical element is provided with an optical layer in which a concavo-convex surface is formed on the surface thereof, and a wavelength-selective reflection layer formed on the concavo-convex surface. The wavelength-selective reflection layer directionally reflects light having a specific wavelength band selectively, while transmitting light having wavelength bands other than the specific wavelength band. The concavo-convex surface is provided with a plurality of first structural elements that are extended in a first direction within the surface of the optical layer and a plurality of second structural elements that are extended in a second direction within the surface of the optical layer, and placed to be spaced apart from each other, with the first direction and the second direction intersecting with each other.
Owner:DEXERIALS CORP
Optical sheet member and display device
InactiveUS20160349573A1Extended Brightness RangeIncrease color rangeMechanical apparatusPolarising elementsSelective reflectionDisplay device
Provided are an optical sheet member including an optical conversion sheet containing a fluorescent material which absorbs at least a part of light in a wavelength range of 380 nm to 480 nm, converts the absorbed light into light in a wavelength range longer than that of the absorbed light, and re-emits the converted light, and a wavelength selective reflective polarizer functioning in the wavelength range of at least a part of the light in the wavelength range of 380 nm to 480 nm, in which both of front brightness and a color reproduction range are improved in a case of being incorporated into a display device using backlight which emits light having at least a blue wavelength range; and the display device.
Owner:FUJIFILM CORP
Projection screen and projection system comprising the same
InactiveUS20050057804A1Sharp displayImprove brightness distributionLiquid crystal compositionsProjectorsLiquid crystallineSelective reflection
The present invention provides a projection screen capable of sharply displaying an image even under bright environmental light, of improving brightness distribution and viewing angle, and of providing high image visibility, and a projection system including such a projection screen. The projection screen includes: a polarized-light selective reflection layer that selectively reflects a specific polarized-light component; a substrate that supports the polarized-light selective reflection layer; and a circular Fresnel lens provided on the observation side of the polarized-light selective reflection layer. The circular Fresnel lens controls the optical axis of right-handed circularly polarized light projected on the projection screen so that the light enters the polarized-light selective reflection layer nearly vertically to it regardless of the point and angle at which the light is incident on this layer. The right-handed circularly polarized light incident on the polarized-light selective reflection layer is diffuse-reflected from this layer owing to the scattering properties (the property of diffusing light that is selectively reflected, owing to structural non-uniformity in a cholesteric liquid crystalline structure containing a plurality of helical structure parts whose helical axes extend in different directions) possessed by the polarized-light selective reflection layer, and the reflected light is returned, via the circular Fresnel lens, to a particular observation point at which a viewer makes observation.
Owner:DAI NIPPON PRINTING CO LTD
Selective reflectivity process chamber with customized wavelength response and method
InactiveUS20050023267A1High emissivityDrying solid materials with heatMuffle furnacesSpectral responseSelective reflection
A customizable chamber spectral response is described which can be used at least to tailor chamber performance for wafer heating, wafer cooling, temperature measurement, and stray light. In one aspect, a system is described for processing a treatment object having a given emission spectrum at a treatment object temperature which causes the treatment object to produce a treatment object radiated energy. The chamber responds in a first way to the heating arrangement radiated energy and in a second way to the treatment object radiated energy that is incident thereon. The chamber may respond in the first way by reflecting the majority of the heat source radiated energy and in the second way by absorbing the majority of the treatment object radiated energy. Different portions of the chamber may be treated with selectively reflectivity based on design considerations to achieve objectives with respect to a particular chamber performance parameter.
Owner:MATTSON TECHNOLOGY +1
Reflective Display
ActiveUS20090140961A1Simple processImprove performanceStatic indicating devicesNon-linear opticsSelective reflectionDisplay device
A reflective display device (2) comprises a plurality of controllable light absorption layers (8) arranged in a stack. Each of the layers (8) is capable of absorbing incident light in a specified wavelength band. A selective reflector (10) is immediately behind at least one of the layers (8) and is adapted to reflect at least some wavelengths of light within the wavelength band and substantially to transmit light of other wavelengths.
Owner:HEWLETT PACKARD DEV CO LP
Thin film transistor panel and liquid crystal display using the same
ActiveUS20060158588A1Reduce power consumptionStatic indicating devicesNon-linear opticsLiquid-crystal displayImage resolution
An LCD device includes a transmissive LCD panel assembly, a backlight assembly for supplying light to the LCD panel assembly, and a selective reflection film provided between the backlight assembly and the LCD panel assembly. A display region of the LCD has a low-resolution area and a high-resolution area, and a pixel formed in the low-resolution area that is larger than a pixel formed in the high-resolution area.
Owner:SAMSUNG DISPLAY CO LTD
Method for altering metal surface color with ultra-short pulse laser
InactiveCN101368256ANanostructure manufactureSolid state diffusion coatingSelective reflectionLight beam
The invention discloses a method for changing the color and lustre on a metal surface by an ultra-short pulse laser, which relates to the field of processing the surface of metal material. In the invention, an ultra-short pulse laser beam with a pulse width between 2 femtosecond and 100 picosecond is used to directly radiate the metal surface; different micron and even nanometer structures are formed on the metal surface through controlling the parameters like energy and polarization of the pulse laser; the forming of the nanometers makes the metal surface realize selective reflection phenomenon on the light at different angles and lead the metal surface to be seen to have a plurality of different metal colors. The technology can be applied for the manufactures like the color changing and anti-fake brands on the surfaces of metal jewelleries and can obtain polychrome colors like the wings of butterflies.
Owner:BEIJING UNIV OF TECH
Lighting device having illumination, backlighting and display applications
Provided are a lighting device, a backlighting device, and a display device that comprise a radiation source such as LED and wavelength converting members comprising phosphors. In one embodiment, self-absorption within the devices is suppressed or reduced by placing a selective reflector between two wavelength converting members, and the wavelength converting member emitting light with longer peak wavelength is substantially isolated from the irradiation of another wavelength converting member emitting light with shorter peak wavelength. In other embodiments, the wavelength converting members are arranged in strip configuration; or in adjacent hexagons configuration.
Owner:GE LIGHTING SOLUTIONS LLC
Tissue scanning apparatus and method
Owner:ARGO AI LLC
Viewing angle magnification liquid crystal display unit
InactiveUS7317498B2Increase contrastHigh color reproductionPolarising elementsNon-linear opticsDiffusionSelective reflection
A viewing angle magnification liquid crystal display of this invention comprising: at least a backlight system containing a polarization element (A) obtained by disposing a retardation layer (b) between at least two layers, included in a reflection polarizer (a), and having respective selective reflection wavelength bands of polarized light superimposed on each other to conduct collimation for a diffusion light source; a liquid crystal cell transmitting collimated lights; a polarizing plate disposed on both sides of the liquid crystal cell; and a viewing angle magnifying layer disposed on the viewer side of the liquid crystal cell to diffuse transmitted light. The liquid crystal display can realize a thin type and have a wide viewing angle.
Owner:NITTO DENKO CORP
Selective reflective and absorptive surfaces and methods for resonantly coupling incident radiation
Methods and apparatus for providing a tunable absorption band in a wavelength selective surface are disclosed. A device for selectively absorbing incident electromagnetic radiation includes an electrically conductive surface layer including an arrangement of multiple surface elements. The surface layer is disposed at a nonzero height above a continuous electrically conductive layer. An electrically isolating intermediate layer defines a first surface that is in communication with the electrically conductive surface layer. The continuous electrically conductive backing layer is provided in communication with a second surface of the electrically isolating intermediate layer. The arrangement of surface elements couples at least a portion of the incident electromagnetic radiation between itself and the continuous electrically conductive backing layer, such that the resonant device selectively absorbs incident radiation, and reflects a portion of the incident radiation that is not absorbed.
Owner:FLIR SURVEILLANCE +1
Method and apparatus for coupling radiation from a stack of diode-laser bars into a single-core optical fiber
InactiveUS7010194B2Precise alignmentEnhanced couplingCoupling light guidesSemiconductor lasersSelective reflectionLight beam
A method of coupling laser-radiation into an optical fiber includes providing a stack of diode-laser bars and first and second parallel mirrors, the second mirror is selectively reflective only for one polarization plane of the laser-radiation. Each of the diode-laser bars includes at least two spaced-apart diode-laser emitters each emitting a plane-polarized beam of laser-radiation having a fast axis and a slow axis. The laser-radiation beams are collimated in the fast axis by a cylindrical lens located in front of each bar. In one arrangement the polarization orientation of one collimated beam from each diode-laser is rotated by 90 degrees and transmitted through the selectively-reflective mirror. The other collimated beam from each diode-laser bar is reflected onto the selectively-reflective mirror by the first mirror and reflected from the selectively-reflective mirror such that the reflected beam combines with the transmitted beam to form a combined beam. As many combined beams are formed as there are diode-laser bars in the stack. These combined beams are focused into an entrance face of the optical fiber.
Owner:COHERENT INC
Projection screen and projection system comprising the same
InactiveUS7161737B2Sharp displayImprove visibilityLiquid crystal compositionsDiffusing elementsLiquid crystallineSelective reflection
A projection screen including a polarized-light selective reflection layer having a cholesteric liquid crystalline structure that causes selective diffuse-reflection of a specific polarize-light component, and a substrate for supporting the polarized-light selective reflection layer. The polarized-light selective reflection layer includes three partial selective reflection layers that are layered one over another, and each partial selective reflection layer has a cholesteric liquid crystalline structure that causes selective diffuse-reflection of a specific polarized light component. In the polarized-light selective reflection layer, three partial selective reflection layers that reflect light in the green (G) color wave range, red (R) color wave range, and blue (B) color wave range are layered in this order, the firstly-mentioned partial selective reflection layer being on the observation side. Namely, the partial selective reflection layer for selectively reflecting light in the green (G) color wave range is arranged as the outermost layer on the observation side.
Owner:DAI NIPPON PRINTING CO LTD
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