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16348 results about "Polarizer" patented technology
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A polarizer or polariser is an optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations. It can filter a beam of light of undefined or mixed polarization into a beam of well-defined polarization, that is polarized light. The common types of polarizers are linear polarizers and circular polarizers. Polarizers are used in many optical techniques and instruments, and polarizing filters find applications in photography and LCD technology. Polarizers can also be made for other types of electromagnetic waves besides light, such as radio waves, microwaves, and X-rays.
Stationary and dynamic radial transverse electric polarizer for high numerical aperture systems
InactiveUS20040169924A1Polarising elementsSemiconductor/solid-state device manufacturingHigh numerical apertureClassical mechanics
A radial transverse electric polarizer device is provided. The device includes a first layer of material having a first refractive index, a second layer of material having a second refractive index, and a plurality of elongated elements azimuthally and periodically spaced apart, and disposed between the first layer and the second layer. The plurality of elongated elements interact with electromagnetic waves of radiation to transmit transverse electric polarization of electromagnetic waves of radiation. One aspect of the invention is, for example, to use such polarizer device in a lithographic projection apparatus to increase imaging resolution. Another aspect is to provide a device manufacturing method including polarizing a beam of radiation in a transverse electric polarization.
Owner:ASML NETHERLANDS BV
Stationary and dynamic radial transverse electric polarizer for high numerical aperture systems
InactiveUS20040227923A1Semiconductor/solid-state device manufacturingPolarising elementsHigh numerical aperturePolarizer
A radial transverse electric polarizer device includes a substrate material having a first refractive index and a plurality of elongated azimuthally oriented elements coupled to the substrate material, the plurality of elongated elements having a second refractive index. The plurality of elements are periodically spaced apart to form a plurality of gaps such that the radial transverse electric polarizer device interacts with an electromagnetic radiation including first and second polarizations to reflect substantially all of the radiation of the first polarization and transmit substantially all of the radiation of the second polarization. The plurality of elongated elements are coated with this thin layer of absorbing material which absorbs radiation at a wavelength of the electromagnetic radiation. The polarizer device may be used, for example, in a lithographic projection apparatus to increase imaging resolution.
Owner:ASML NETHERLANDS BV
Overlay Measurement Apparatus, Lithographic Apparatus and Device Manufacturing Method Using Such Overlay Measurement Apparatus
ActiveUS20110188020A1Photomechanical apparatusSemiconductor/solid-state device manufacturingMetrologyLight beam
An overlay measurement apparatus has a polarized light source for illuminating a sample with a polarized light beam and an optical system to capture light that is scattered by the sample. The optical system includes a polarizer for transmitting an orthogonal polarization component that is orthogonal to a polarization direction of the polarized light beam. A detector measures intensity of the orthogonal polarization component. A processing unitise connected to the detector, and is arranged to process the orthogonal polarization component for overlay metrology measurement using asymmetry data derived from the orthogonal polarization component.
Owner:ASML NETHERLANDS BV
Ku/Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna
InactiveCN102136634ACompact and efficientExcellent transceiver isolationAntenna supports/mountingsPolarised antenna unit combinationsReflection lossAxial ratio
The invention provides a Ku / Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna applied to antenna systems, such as a paraboloid antenna and the like, in satellite communication. The antenna adopts a coaxial nested compact structure, and is applied to Ku frequency band and Ka frequency band at the same time. The basic structure of a feed source comprises a circular waveguide, on which a pointed cone shaped dielectric rod is loaded, a flange, a coaxial waveguide, a symmetrical SMA connector pair, a circular polarizer and an orthogonal mode coupler, wherein the feed source in the Ka frequency band is applied to dual circular polarization, has rotary symmetrical radiation directional diagrams, the circularly polarization axial ratio in Ka double band is smaller than minus 2dB, and the transmitter-receiver isolation is smaller than minus 70dB; and the feed source in the Ku frequency band is applied to dual circular polarization, has rotary symmetrical radiation directional diagrams, a cross polarization level smaller than minus 40dB, and good transmitter-receiver isolation and reflection loss.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Vehicle Rearview Mirror Assembly Including a High Intensity Display
ActiveUS20080068520A1Eliminate effect of losingNon-linear opticsOptical viewingTransmittanceDisplay device
An inventive rearview assembly for a vehicle may comprise a mirror element and a display including a light management subassembly. The subassembly may comprise an LCD placed behind a transflective layer of the mirror element. Despite a low transmittance through the transflective layer, the inventive display is capable of generating a viewable display image having an intensity of at least 250 cd / m2 and up to 3500 cd / m2. The display includes a novel backlighting subassembly and novel optical components including a magnifying system, a depolarizer, a reflector, and a reflective polarizer. The display may be configured to display an image having edges contoured to correspond to the edges of the mirror element.
Owner:GENTEX CORP
Enhanced LCD backlight
ActiveUS20060056166A1Improved backlight assemblyAvoid less flexibilityElectric discharge tubesDiffusing elementsCompression moldingEllipsoidal particle
The present invention provides an improved light guide with inherently more flexibility for display system designers and higher optical efficiency. By using a light guide containing substantially aligned non-spherical particles, more efficient control of the light scattering can be achieved. One or more regions containing ellipsoidal particles may be used and the particle sizes may vary between 2 and 100 microns in the smaller dimension. The light scattering regions may be substantially orthogonal in their axis of alignment. Alternatively, one or more asymmetrically scattering films can be used in combination with a backlight light guide and a reflector to produce an efficient backlight system. The light guides may be manufactured by embossing, stamping, or compression molding a light guide in a suitable light guide material containing asymmetric particles substantially aligned in one direction. The light scattering light guide or non-scattering light guide may be used with one or more light sources, collimating films or symmetric or asymmetric scattering films to produce an efficient backlight that can be combined with a liquid crystal display or other transmissive display. By maintaining more control over the scattering, the efficiency of the recycling of light by using reflective polarizers can also be increased.
Owner:MASSACHUSETTS DEV FINANCE AGENCY
Integrated light sensitive liquid crystal display
A liquid crystal device including a front electrode layer, rear electrode layer, a liquid crystal material located between the front electrode layer and the rear electrode layer. A polarizer is located between the liquid crystal material and the front electrode layer and changing an electrical potential between the rear electrode layer and the front electrode layer modifies portions of the liquid crystal material to change the polarization of the light incident thereon. A plurality of light sensitive elements are located together with the rear electrode layer and a processor determines the position of at least one of the plurality of light sensitive elements that has been inhibited from sensing ambient light.
Owner:APPLE INC
Collimating optical member for real world simulation
A collimating image-forming apparatus comprising a first linear polarizer is disclosed. A first quarter-wave plate is disposed adjacent the first polarizer and has its fast and slow axes at substantially 45° to the plane of polarization of the first polarizer. The apparatus further comprises a beam-splitting curved mirror having a convex surface adjacent the first polarizer and facing towards the first quarter-wave plate, a second quarter-wave plate adjacent the concave side of the curved mirror, the second quarter-wave plate having its having its fast and slow axes oriented with respect to the corresponding axes of the first quarter-wave plate at angles substantially equal to a first integral multiple of 90°, and a reflective-transmissive polarizing member adjacent the second quarter-wave plate. A second linear polarizer is adjacent the reflective-transmissive polarizing member, the second linear polarizer having its plane of polarization oriented with respect to the plane of polarization of the first linear polarizer at an angle substantially equal to a second integral multiple of 90°, both of the multiples being even or both being odd.
Owner:OPTICAL RESOLUTIONS +1
Head-up display with polarized light source and wide-angle p-polarization reflective polarizer
A head-up display includes a projection system and a window having a target area where a reflective polarizer is positioned to reflect light from the projection system to a viewing area. Light from the projection system is p-polarized and strikes exposed window surface(s) at an acute angle to reduce or eliminate multiple or âghostâ images. The acute angle is closely matched to a Brewster angle of the exposed window surface(s). The reflective polarizer includes a multilayer stack with refractive indices of individual layers chosen to reflect p-polarized light substantially more than s-polarized light over a wide angular range that includes the acute angle. The reflective polarizer also can reflect infrared light to reduce cabin heating from solar radiation.
Owner:3M INNOVATIVE PROPERTIES CO
Linearly polarized backlight source in conjunction with polarized phosphor emission screens for use in liquid crystal displays
InactiveUS20100220262A1Improve efficiencyLow efficiencySemiconductor/solid-state device manufacturingLuminescent compositionsLiquid-crystal displayPhosphor
A device for displaying images positions a luminescent material between a light source and a liquid crystal display (LCD). The light source, which comprises one or more nonpolar or semipolar III-nitride based light emitting diodes (LEDs), emits a primary light having a specified polarization direction and comprising one or more first wavelengths. This primary light emitted by the light source is a linearly polarized light that eliminates any need for a polarizer. The luminescent material, which comprises one or more phosphors, is optically pumped by the primary light and emits a secondary light having the polarization direction of the primary light, wherein the secondary light is comprised one or more second wavelengths that are different from the first wavelength. This secondary light emitted by the luminescent material is a colored light that eliminates any need for a color filter. The LCD receives the secondary light and displays one or more images in response thereto.
Owner:RGT UNIV OF CALIFORNIA
Integrated optical light sensitive active matrix liquid crystal display
ActiveUS7009663B2Static indicating devicesNon-linear opticsActive-matrix liquid-crystal displayLiquid-crystal display
A liquid crystal device including a front electrode layer, rear electrode layer, a liquid crystal material located between the front electrode layer and the rear electrode layer. A polarizer is located between the liquid crystal material and the front electrode layer and changing an electrical potential between the rear electrode layer and the front electrode layer modifies portions of the liquid crystal material to change the polarization of the light incident thereon. A plurality of light sensitive elements are located together with the rear electrode layer and a processor determines the position of at least one of the plurality of light sensitive elements that has been inhibited from sensing ambient light.
Owner:APPLE INC
LED-based edge lit illumination system
An edge lit illumination system is directed to providing backlighting utilizing a luminescent impregnated lightguide. The apparatus includes an LED radiation source providing a first radiation and a lightguide optically coupled to the LED radiation source including a luminescent material embedded or coated on an output surface of the lightguide designed to absorb the first radiation, and emit one or more radiations. The illumination system may further include additional optical components such as reflective layers, for directing radiation striking the back surfaces of the light guide back into the lightguide, as well as diffusion layers, UV reflectors, and polarizers.
Owner:GE LIGHTING SOLUTIONS LLC
Liquid crystal display with mirror mode having top reflective polarizer
InactiveUS7057681B2Improve seismic performanceQuality improvementPolarising elementsIlluminated signsLiquid-crystal displayDisplay device
In a display device 100, a reflective polarizer 110, a polarizer 120, a retarder 130, a liquid crystal panel 140, a polarizer 150, and a backlight 160 are disposed sequentially from the viewing side. When the liquid crystal panel 140 is set in a light blocking state or the backlight 160 is set in an unlit state, the reflection of an outside light âOâ turns the display screen into a mirror state. When the backlight 160 is set in a lit state to drive the liquid crystal panel 140, a transmitted light âTâ allows a particular display screen to be visually recognized.
Owner:BOE TECH GRP CO LTD
Liquid crystal display viewable under all lighting conditions
A liquid crystal display (LCD) viewable under all lighting conditions without excessive power consumption is described. The LCD comprises a first dichroic polarizer, a second dichroic polarizer, an anti-reflection layer positioned in front of the first dichroic polarizer and a liquid crystal cell positioned between the first dichroic polarizer and the second dichroic polarizer. In addition, the LCD comprises a backlight assembly positioned behind the second dichroic polarizer. Finally, the LCD comprises a diffusing transflector positioned between the backlight assembly and the second dichroic polarizer. The diffusing transflector comprises a diffusing element and a transflective element.
Owner:WANG RAN HONG RAYMOND +1
Vehicle rearview mirror assembly including a high intensity display
An inventive rearview assembly for a vehicle may comprise a mirror element and a display including a light management subassembly. The subassembly may comprise an LCD placed behind a transflective layer of the mirror element. Despite a low transmittance through the transflective layer, the inventive display is capable of generating a viewable display image having an intensity of at least 250 cd / m2 and up to 3500 cd / m2. The display includes a novel backlighting subassembly and novel optical components including a magnifying system, a depolarizer, a reflector, and a reflective polarizer. The display may be configured to display an image having edges contoured to correspond to the edges of the mirror element.
Owner:GENTEX CORP
Apparatus for exposing a substrate, photomask and modified illuminating system of the apparatus, and method of forming a pattern on a substrate using the apparatus
InactiveUS20060083996A1Easy to shapeRaise transfer toPolarising elementsSemiconductor/solid-state device manufacturingSingle exposureEngineering
An exposure apparatus and photo-mask of the exposure apparatus can form a perpendicular line / space circuit pattern through only a single exposure process. The photo-mask includes a first line / space pattern oriented in a first direction, a second line / space pattern oriented in a second direction and lattice patterns, operating as polarizers, occupying the spaces of the line / space patterns. The exposure apparatus also includes a modified illuminating system. The modified illuminate system may be a composite polarization illuminating system having a shielding region, and a plurality of light transmission regions defined within the field of the shielding region. The light transmission regions are implemented as polarizers that polarize the light incident thereon in the first and second directions, respectively.
Owner:SAMSUNG ELECTRONICS CO LTD
Non-inverting transflective assembly
A film that includes a first reflective polarizer substantially reflecting light having a first polarization state and substantially transmitting light having a second polarization state, a polarization rotating layer or depolarizing layer (or both) positioned to receive light passing through the first reflective polarizer, and a second reflective polarizer positioned to receive light passing through the polarization rotating layer or depolarizing layer, the second reflective polarizer substantially reflecting light having a third polarization state back through the polarization rotating layer or depolarizing and substantially transmitting light having a fourth polarization state. Articles containing the film can be formed.
Owner:3M INNOVATIVE PROPERTIES CO
Semi-transmissive liquid crystal display device
InactiveUS6914656B2Improve viewing angle characteristicsPrintingNon-linear opticsPolarizerLength wave
In a semi-transmissive liquid crystal display device having a reflective region 5 and a transmissive region therein, a one-half wavelength plate 29 is disposed between a lower substrate 11 and a polarizer 21a provided on a side of the lower substrate. This makes liquid crystal molecules in at least the transmissive region 6 driven by a horizontal electric field and allows the device to operate in a normally-black mode in both the reflective region 5 and the transmissive region 6, realizing a semi-transmissive liquid crystal display device having wide viewing angle characteristics.
Owner:NEC LCD TECH CORP
Method and apparatus for reflected imaging analysis
InactiveUS6104939AQuick measurementPolarisation-affecting propertiesScattering properties measurementsWhite blood cellPolarizer
Method and apparatus for reflected imaging analysis. Reflected imaging is used to perform non-invasive, in vivo analysis of a subject's vascular system. A raw reflected image (110) is normalized with respect to the background to form a corrected reflected image (120). An analysis image (130) is segmented from the corrected reflected image to include a scene of interest for analysis. The method and apparatus can be used to determine such characteristics as the hemoglobin concentration per unit volume of blood, the number of white blood cells per unit volume of blood, a mean cell volume, the number of platelets per unit volume of blood, and the hematocrit. Cross-polarizers can be used to improve visualization of the reflected image.
Owner:INTPROP MVM
Polarized, LED-based illumination source
Owner:3M INNOVATIVE PROPERTIES CO
Method and apparatus for bonding polarizing plate
ActiveUS20050016670A1Easy to controlProhibit stop markLamination ancillary operationsDecorative surface effectsPolarizerEngineering
Owner:FUJIFILM CORP +1
Liquid crystal display device having particular reflective polarizer
InactiveUS7006173B1Wide viewing angleReduce power consumptionNon-linear opticsLiquid-crystal displayDisplay device
In order to realize liquid crystal display devices having a wide viewing angle and reduce the absorption loss by polarizers and color filters, and arrangement of reflective color selective means, reflective polarizing selective means, a light control element, and others are specified. The liquid crystal display device able to produce a display of high performance and improved brightness is formed of liquid crystal display elements 20 for controlling polarizing light so that the major axis direction of a pixel is arranged approximately in parallel with a direction wherein the linearly polarized light component of the projected light projected from said illumination device is high; an illumination device 50 arranged at a rear plane of the liquid crystal display element; a reflector 54 arranged at a rear plane of the illumination device; light control elements 40 and reflective polarizing selective means 30 arranged between the liquid crystal display element and the illumination device; and a screen arranged at an opposite side relative to the illumination device of the liquid crystal display element.
Owner:PANASONIC LIQUID CRYSTAL DISPLAY CO LTD +1
Method and device for performing stereoscopic image display based on color selective filters
InactiveUS20070127121A1Lower requirementFast synchronized switchingStereoscopic photographySteroscopic systemsPolarizerProjection system
In one aspect, the present invention relates to a stereoscopic projection system including a projection device with at least one filter which filters a parameter of the light in a color selective manner. The at least one filter which filters a parameter of the light in a color selective manner has a spectral characteristic for transmitting light in a first wavelength band or set of wavelength bands and for reflecting light in a second wavelength band or set of wavelength bands. The projection device includes a device, such as e.g. a rotating wheel or a sliding filter, for fast synchronized switching between light in different wavelength bands or sets of wavelength bands. In a further aspect, a stereoscopic projection system is provided in which a combination of a first and a second filter mechanism are used, the first filter mechanism being a filter which filters a parameter of the light in a color selective manner, such as a color selective filter or a color selective retarder, and the second filter mechanism preferably being a polarizer or a shutter.
Owner:INFITEC
LED multiplexer and recycler and micro-projector incorporating the Same
InactiveUS20090128781A1Increase brightnessEasy to mergeCosmonautic condition simulationsLaser using scattering effectsMultiplexerLight pipe
A micro-projector comprises an LED layer, a light pipe coupled to the LED, a LCOS panel, a projection lens, a PBS, an aperture layer coupled to the output end of the light pipe which has a transmissive opening for transmitting a portion of the light output and a reflective surface for reflecting the remaining portion of the light output toward the input end of the light pipe. Thus, the remaining portion of the light output is recycled back to the LED to increase the brightness of the light output of the LED. The micro-projector also comprises a reflective polarizer disposed between the light pipe and the aperture layer for transmitting the light output of a predetermined polarization and reflecting other polarization of the light output, thereby recycling unused polarization of the light output back to the LED to increase the brightness of the light output of the LED.
Owner:WAVIEN
Reduced reflectance polarized display
A method and apparatus according to various aspects of the present invention provides a polarized display exhibiting reduced reflectances. A polarizer is disposed adjacent to a cover glass in front of the display. Light intended to be transmitted by the display is transmitted by the polarizer. Light reflected after passing through the polarizer reverses polarization, and is absorbed as it intercepts the polarizer following reflection.
Owner:HONEYWELL INC
Polarized, multicolor LED-based illumination source
Light emitting diodes (LEDs) emit light at a first wavelength. A phosphor material close to LEDs converts at least some of the light to a second wavelength. The light at both wavelengths passes through a light collecting unit. A reflecting polarizer transmits both wavelengths in a first polarization state and reflects light at both wavelengths in a second, orthogonal, polarization state. Light reflected by the reflective polarizer is directed back towards the phosphor material without any substantial increase in angular range. The resulting output light beam contains polarized light at the first and second wavelengths. In some embodiments, an array of LEDs includes LEDs that emit light at a first wavelength and others that emit light at a second wavelength. The phosphor material is disposed on the LEDs emitting the light at the first wavelength.
Owner:3M INNOVATIVE PROPERTIES CO
Polarizing element, optical element, and liquid crystal display
InactiveUS6661482B2Reduce contrastImprove the display effectStatic indicating devicesNon-linear opticsLiquid-crystal displayPolarizer
Owner:NITTO DENKO CORP
Display device and folding portable terminal
InactiveUS20050024339A1Small sizeFunctionalInput/output for user-computer interactionDevices with multiple display unitsDisplay devicePolarizer
It is an object to provide a highly functioned and highly value-added display device and mobile terminal. It is another object to provide a display device and mobile terminal characterized by including a plurality of pixels arranged in a matrix form and a first display screen over one surface of a substrate having a translucency, a second display screen over the opposite surface of the one surface of the substrate, each of the plurality of pixels having a light emitting element for emitting light toward the first display screen and the second display screen, and a first polarizer over one surface of the substrate and a second polarizer over the opposite surface of the one surface of the substrate.
Owner:SEMICON ENERGY LAB CO LTD
Surveillance window
A surveillance window including at least one set of linear polarizer and quarter-waveplate and a reflecting surface. The surveillance window appears dull and opaque to a subject, while allowing a relatively high percentage of light to be transmitted to an observer. Various enhancements including an illuminator and detector, camouflaging, fire resistance, and improvements to the opacity are also described.
Owner:THALES AVIONICS INC
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