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758 results about "Phase plate" patented technology
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Phase plate. noun. : a transparent plate of doubly refracting material that changes the relative phase of the components of polarized light.
Display device
InactiveUS7067985B2Incadescent screens/filtersElectric discharge tubesDisplay deviceLight emitting device
Owner:SAMSUNG DISPLAY CO LTD +1
Height Adjustable Phase Plate for Generating Optical Vortices
A phase plate including a plurality of surfaces arranged around a symmetry axis to reflect an incident electromagnetic field having a null orbital angular momentum, thereby generating a reflected electromagnetic field having an orbital angular momentum. The surfaces are arranged such that, with respect to a cylindrical reference system in which the azimuthal coordinate is measured in a plane perpendicular to the symmetry axis, the respective heights define a non-monotonic azimuthal profile, so that the reflected electromagnetic field forms an optical vortex whose topological charge is not associated one-to-one to the orbital angular momentum.
Owner:SELEX SISTEMI INTEGRATI
Phase correction element and optical head device
InactiveUS20050226122A1Polarising elementsRecord information storagePhase differenceNumerical aperture
The present invention provides a phase correction element which can be used for recording and / or reproducing an information of three types of optical disks for HD, DVD and CD by employing a single objective lens for HD, and an optical head device. The phase correction element 100 of present invention comprises a first phase correction layer 10A formed in a region of numerical aperture NA2, and a first phase plate 30A integrally formed; the first phase correction layer 10A comprising a concavo-convex portion having a rotational symmetry with respect to the optical axis of incident light and having a cross-sectional shape of a saw-tooth-form or a saw-tooth-form whose convex portions are each approximated by a step form; the first phase plate 30A generating a birefringent phase difference of about an odd number times of π / 2 for linearly polarized light having a wavelength of λ1; and the phase correction element 100 having a function of not changing a transmitted wavefront of the wavelength of λ1 and changing a transmitted wavefront of the wavelength of λ2 or transmitted wavefront of both wavelengths of λ2 and λ3 when three types of incident light in a λ1=410 nm wavelength band, a λ2=650 nm wavelength band and a λ3=780 nm wavelength band respectively, are incident.
Owner:ASAHI GLASS CO LTD
STED super-resolution microscope based on first-order Bessel beams and adjustment method thereof
ActiveCN105182523AHigh-resolutionGood spot shapeMaterial analysis by optical meansMicroscopesSelf-healingCollection system
Owner:PEKING UNIV
System and method for preparing micro-pore array through femtosecond laser direct writing
InactiveCN103071930AEasy to operateTransformation is easy and feasibleLaser beam welding apparatusFrequency spectrumSpatial light modulator
The invention discloses a system and a method for preparing a micro-pore array through femtosecond laser direct writing. The system comprises a femtosecond vector light field generation system, a spatial filtering component, a computer and a three-dimensional mobile platform, wherein a 1 / 2 wave plate, a Glan-laser polarizer, a beam expander and the femtosecond vector light field generation system are arranged on an output straight light path of a femtosecond laser device in sequence; a 4f system is arranged on a light path behind a reflective pure phase spatial light modulator after a holographic phase plate is loaded; a spatial filter is arranged on a frequency spectrum surface; and positive and negative levels of diffraction light which pass through the spatial filter pass through a 1 / 4 wave plate respectively and are combined into a beam of laser through a Rochi grating. A material is adjusted to a focal position through the spatial filtering component, an electronic diaphragm, a focusing lens and the three-dimensional mobile platform; and the spatial light modulator, the electronic diaphragm and the three-dimensional mobile platform are connected with a computer through data lines. The device has the advantages of simple structure, convenience in operation and capabilities of preparing the micro-pore array with various patterns and improving the machining efficiency.
Owner:NANKAI UNIV
Biometric Authentication Apparatus
InactiveUS20090304237A1FocusSimple configurationCharacter and pattern recognitionDiagnostic recording/measuringImaging processingImaging lens
A biometric authentication apparatus having a simple configuration, able to easily focus on a fingerprint or a vein or other blood vessel pattern and able to clearly capture an image of the same, able to prevent forgery, and in addition able to realize high precision authentication, which biometric authentication apparatus 100 having a transparent plate 110 formed by for example glass or plastic for placement of the finger of the authenticated person, that is, the inspected specimen OBJ, downward in the figure (surface where fingerprint is located facing downward), a fingerprint capturing use illumination apparatus 120, a vein capturing use illumination apparatus 130, and an image capturing apparatus 140, which image capturing apparatus 140 has an imaging lens apparatus capturing a dispersed image of an object passing through the optical system and phase plate, an image processing apparatus generating a dispersion-free image signal from a dispersed image signal from the imaging element, and an object approximate distance information detection apparatus generating information corresponding to the distance to the object, and which the image processing apparatus generating a dispersion-free image signal from the dispersed image signal based on the information generated by the object approximate distance information detection apparatus.
Owner:KYOCERA CORP +1
Multi-color biosensor
InactiveUS20090309049A1Data facilitatedImprove isolationRaman/scattering spectroscopyBeam/ray focussing/reflecting arrangementsLight beamOptical aberration
A detection system is described (100) for detecting luminescence sites on a substrate (6). The detection system (100) typically comprises an irradiation unit (102) for generating at least one excitation irradiation beam for exciting luminescence sites on the substrate (6). The at least one excitation irradiation beam may be a plurality of excitation irradiation beams. The detection system (100) also comprises a first optical element, e.g. refractive element (25), adapted for receiving at least two irradiation beams of different wavelengths or wavelength ranges, the at least two irradiation beams being excitation irradiation beam(s) to be focused on a substrate and / or luminescence irradiation beam(s) to be collected from the excited luminescence sites on the substrate (6). The detection system (100) also comprises an optical compensator for adjusting at least one of the at least two irradiation beams of different wavelengths or wavelength ranges so as to reduce or compensate for optical aberrations. The present invention also relates to a corresponding method for detecting, a phase plate and a method for designing such a phase plate.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV
Illumination optical system, exposure apparatus, and device manufacturing method with modified illumination generator
InactiveUS7265816B2Lowering illumination efficiencyPhotomechanical exposure apparatusMicrolithography exposure apparatusTarget surfaceIlluminance
Owner:CANON KK
Liquid crystal device and electronic apparatus
InactiveUS6680765B1High quality reflection typeQuality improvementClosuresStatic indicating devicesLight guideElectron
In a dark environment, when a backlight 119 is lighted, white light emitted from the surface of a light guide plate 118 passes through a polarizing plate 107 and a phase plate 108 and, further, passes through a transflective plate 111 and a transparent electrode 116 provided on the inner surface of a substrate 102 before it is introduced into a liquid crystal layer 3. Then, it is guided to the exterior of a liquid crystal cell and sequentially passes through a phase plate 106 and a polarizing plate 105 before it is guided to the exterior. In a bright environment, external light incident from the polarizing plate 105 passes through the liquid crystal layer 3, and is then reflected by the transflective plate 111 through the transparent electrode 116 before it is passed through the polarizing plate 105 again and guided to the exterior.
Owner:138 EAST LCD ADVANCEMENTS LTD
Devices, systems and methods for creating and demodulating orbital angular momentum in electromagnetic waves and signals
ActiveUS20180287262A1Reduce multiplexing errorImprove OAM demodulationWaveguide hornsNanoopticsUltravioletEngineering
Orbital angular momentum (OAM) communications systems provide an additional degree of freedom to the electromagnetic waves that travel between the transmission and receiving stations, thereby enabling a dramatic increase in data transmission rates. The present invention provides a design for a very low reflectivity flat spiral phase plate that generates OAM modes and a method of making the same. The design incorporates variable sizes of perforated unit cells and may include matched layers to provide improved impedance matching, and the flat disc shape makes the phase plate compact and easy to install. The OAM phase plate can be designed to operate at frequencies from a few 100s KHz to ultraviolet frequencies and is capable of providing one or more OAM modes at the operational frequencies, irrespective of polarization. In a preferred embodiment, the OAM phase plate is designed for operation at about 30 GHz frequency, with 20 GHz bandwidth.
Owner:THE RES FOUND FOR SUNY
Multi-mode microimaging method based on programmable LED array illumination
The invention discloses a multi-mode microimaging method based on programmable LED array illumination. An LED array used as an illumination light source of a microimaging system is directly installed below a sample carrying bench of the microimaging system and the center of the LED array is located at an optical axis of the microimaging system, thereby realizing phase contrast, optical field imaging, and optical dyeing imaging modes. With the method, dyeing microimaging can be realized flexibly and no additional optical element like an annular diaphragm, a microlens array, and a phase plate and the like needs to be added in an imaging light path of a microscopic, so that the system structure is simplified and the cost is substantially reduced.
Owner:NANJING UNIV OF SCI & TECH
Liquid crystal display apparatus
The liquid crystal display apparatus includes a liquid crystal layer 10 and a liquid crystal driving unit 19 which are held in being sandwiched between a pair of opposed boards 11, 12, and polarization plates 33, 34 and phase plates 31, 32 which are located on the upper side and on the lower side, respectively. Moreover, a pixel of the liquid crystal display apparatus includes the reflection display unit whose reflectivity's applied voltage characteristic is the normally-closed type and the transmission display unit whose layer thickness is thicker than that of a liquid crystal layer constituting the reflection display unit. Furthermore, the polarization plate 34 and the phase plate 32 located on the lower side of the opposed boards form an elliptical polarization plate, thereby converting, into a circularly-polarized light, a backlight light at a point-in-time of having passed through a liquid crystal layer's portion corresponding to a difference in the layer thickness between the liquid crystal layers.
Owner:PANASONIC LIQUID CRYSTAL DISPLAY CO LTD +1
Method For The Production Of Multiplayer Electrostatic Lens Array
InactiveUS20100065741A1Simple and cost-effective methodHigh yieldLine/current collector detailsMaterial analysis using wave/particle radiationElectron microscopeOptoelectronics
The invention relates to a method for the production of a multilayer electrostatic lens arrangement with at least one lens electrode in general, a method for the production of a phase plate in particular as well as the lens arrangement, the phase plate and a transmission electron microscope with the phase plate.The lens arrangement or the phase plate is produced from a thin self-supporting silicon nitride membrane which is fixed in a macroscopic chip with deposition of further layers. beam.The central bore as well as the aperture opening are milled out by means of an ion
Owner:GERTHSEN DAGMAR +2
Naked eye three-dimensional display device based on active emitting type display technology
The invention discloses a naked eye three-dimensional display device based on an active emitting type display technology. The device comprises an active emitting display unit, wherein the display unit comprises an emitting array adjustable in light strength, and according to multi-visual-angle superposed images, the emitting array modulates a light field amplitude through a circuit control system; and a directive phase plate, wherein the pixels of the directive phase plate contains nano-grating pixel structures which are respectively corresponding to sub-pixels of the visual-angle images, the nano-grating pixel structures contains nano-grating combinations which are designed according to a holographic principle, the nano-grating pixel structures carry out wavefront conversion on incident visual-angle images after light emitted by the active emitting display unit is irradiated to the directive phase plate, and a convergence viewpoint of parallel illumination light is formed in the space in front of or at the side surface of the active emitting display unit. Compared with the prior art, the demands of personal consumption electronic markets and industrial and outdoor display markets are simultaneously met, and naked eye three-dimensional display which is ultra-thin, convenient, large in area, high in brightness and low in cost is realized.
Owner:SVG TECH GRP CO LTD +1
Method and device for generating perfect Laguerre-Gaussian beam
InactiveCN103941405ASimple methodReliable methodOptical elementsSpatial light modulatorGaussian beam
The invention relates to a method and device for generating a perfect Laguerre-Gaussian beam. After a Gaussian beam is expanded, a spatial light modulator of a computer-generated hologram is loaded and used for regulating a light field, a first-level diffraction beam emitted by the spatial light modulator is captured, and then a hollow Gaussian beam is obtained; phase modulation is conducted through a spiral phase plate, so that a hollow beam carrying orbital angular momentum is obtained; focusing is conduced through a convex lens, so that the perfect Laguerre-Gaussian beam is obtained. According to the method and device for generating the perfect Laguerre-Gaussian beam, the perfect Laguerre-Gaussian beam is generated through the hollow beam carrying the orbital angular momentum, the method is simple and reliable, and the device is simple in structure, easy to adjust and good in stability; the generated beam can be applied to the fields such as the particle capturing field, the free space optical communication and the beam transmission characteristic research field.
Owner:SUZHOU UNIV
Birotor fault simulation experiment device
ActiveCN103759934AChange the status quo of difficult to simulate dynamic rubbing faultsRealize the measurement of collision force in the horizontal directionMachine part testingFault analysisEngineering
The invention discloses a birotor fault simulation experiment device. Based on a gas turbine birotor test bed, a movable-static rubbing support with a force sensor, a movable-static rubbing block, a movable-movable rubbing adjusting bolt with an adjustable gap and the like are used for simulating a rotor rubbing fault and measuring the impact force in the horizontal direction. Fine-grained metal chips are filled into a bearing lubricating cavity to simulate a bearing abrasion fault. Stainless gap pieces with different thicknesses are combined with a bearing block, and a rotor misalignment fault is simulated. Through a positioning hole and a mass block of a wheel disc and matching of a bonded phase plate, a mass unbalance fault of a rotor with the adjustable mass and phase is simulated. A disc-shaped spring and a bearing block are used for simulating a looseness fault of the bearing block with the adjustable looseness. The birotor fault simulation experiment device can be used for simulating the faults of rotor rubbing, bearing abrasion, rotor misalignment, rotor mass unbalance and bearing block looseness of a gas turbine birotor system, the accuracy of fault analysis of the gas turbine birotor system is improved, and experiment reference data are provided for simulation calculation.
Owner:TSINGHUA UNIV
System and method for generating radial Bessel-Gaussian beam
The invention discloses a system for generating a radial Bessel-Gaussian beam. The system comprises a beam expander, a computer-controlled spatial light modulator, a vortex phase plate and a radial polarization convertor that are sequentially arranged in a light direction of a light source generating linearly polarized light, wherein a topological charge of the vortex phase plate is 1; and a calculation hologram generated by a computer is loaded to the spatial light modulator to form a calculation holographic grating, so that a first order Bessel-Gaussian beam is generated. The vortex phase plate is rotated to ensure that phase structure distribution of the vortex phase plate is right opposite to the phase structure distribution of the Bessel-Gaussian beam coming out of the spatial light modulator, and a vortex phase of the Bessel-Gaussian beam is eliminated. Then, the Bessel-Gaussian beam with the vortex phase being eliminated passes through the radial polarization convertor. Radial polarization Bessel-Gaussian beams with different ring numbers can be generated by generating different holograms due to the flexibility of the holograms of the computer, and have self-restorability.
Owner:SUZHOU UNIV
Light source unit and projector
InactiveUS20050213310A1Improve heat resistanceHigh light usabilityPoint-like light sourceProjectorsOptoelectronicsLight source
Owner:SEIKO EPSON CORP
Light-emitting devices and light-emitting displays
InactiveUS20060158096A1Effective displayReduce morbidityDischarge tube luminescnet screensElectroluminescent light sourcesDisplay devicePolarizer
Owner:SAMSUNG DISPLAY CO LTD +1
Transmissive phase plate, polarized beam splitter, and projection display
InactiveUS20070104073A1Improve contrast ratioAvoid Contrast LossProjectorsRecord information storageBeam splitterLight flux
A transmissive phase plate with a function of correcting direction of polarization of light rays in an incident divergent or convergent light flux in addition to functions as a wave plate. Conditions of polarization of incident light rays are corrected by a polarization-correcting optical multi-layer coating which is formed by alternately depositing a high refractivity layer and a low refractivity layer on curved substrative surface of a predetermined radius of curvature. The transmissive phase plate can be applied to correct conditions of polarization of incident light rays of a polarized beam splitter for the purpose of improving contrast ratio of a projection display.
Owner:FUJI PHOTO OPTICAL CO LTD
Variable-motion optical tomography of small objects
InactiveUS7197355B2Reconstruction from projectionMaterial analysis using wave/particle radiationObject motionOptical tomography
Motion of an object of interest, such as a cell, has a variable velocity that can be varied on a cell-by-cell basis. Cell velocity is controlled in one example by packing cells into a capillary tube, or any other linear substrate that provides optically equivalent 360 degree viewing access, so that the cells are stationary within the capillary tube, but the capillary tube is translated and rotated mechanically through a variable motion optical tomography reconstruction cylinder. The capillary tube motion may advantageously be controlled in a start-and-stop fashion and translated and rotated at any velocity for any motion interval, under the control of a computer program. As such, there are several configurations of the optical tomography system that take advantage of this controlled motion capability. Additionally, the use of polarization filters and phase plates to reduce light scatter and diffraction background noise is described.
Owner:VISIONGATE
Image encryption method based on double random phase encoding and interference principle
ActiveCN103279916AOvercoming the "outline appearance" problemImprove securityImage data processing detailsFrequency spectrumFourier transform on finite groups
The invention discloses an image encryption method based on double random phase encoding and an interference principle. The image encryption method based on the double random phase encoding and the interference principle comprises the following steps of encryption and decryption. In the encryption step, two images are respectively used as a to-be-encrypted image and an image of a phase plate with false contouring information, the to-be-encrypted image is encrypted by applying the phase plate with the false contouring information and a random phase plate, an encryption result is decomposed into two phase plates by utilizing the interference principle, and random permutation of elements between the two phase plates is realized by a numerical method. In the decryption step, Fourier transformation is performed after two phase plates finally obtained by the encryption are superposed, inverse Fourier transformation is performed after a Fourier transformation result is multiplied by the phase plate with the false contouring information, and the amplitude of the phase plate is extracted to obtain an original image. The method disclosed by the invention is used for the encryption and the decryption of the images. The phase plates obtained by the encryption do not have the outline show problem of the original image. The false contouring information is introduced into the method, so that not only is an effect of misleading attackers exerted but also a basis is provided for legal decoders to select the phase plate on a frequency spectrum surface.
Owner:JIAXING NIYA OPTOELECTRONICS CO LTD
Integrated orbital angular momentum mode transmitter
ActiveCN104065418ASimple structureFlexible wavelength changeElectromagnetic transmittersOptical communicationTransmitter
Owner:HUAZHONG UNIV OF SCI & TECH
Laser microscope
InactiveUS20070076199A1Amount of second harmonic light emitted backward can be increasedIncrease volumeRadiation pyrometryRaman/scattering spectroscopyPhotovoltaic detectorsPhase difference
A laser microscope according to an embodiment of the invention includes: a laser beam source; a phase plate providing a phase difference for laser beam from the laser beam source in accordance with an incident position; an objective lens focusing light transmitted through the phase plate onto a sample; a first separating unit separating second harmonic light emitted from the sample in a direction opposite to a traveling direction of the laser beams from a fundamental light reflected by the sample; and a photodetector detecting the second harmonic light separated from the fundamental light by the first separating unit.
Owner:NANOPHOTON
Generation system and method for spinning-orbital angular momentum hybrid entangled state
ActiveCN104410464ASimple structureEasy to usePhotonic quantum communicationOptical elementsBeam splitterMomentum
The invention discloses a generation system and a generation method for a spinning-orbital angular momentum hybrid entangled state. The system consists of a single photon source, a spinning-orbital angular momentum conversion unit, a spinning-orbital angular momentum hybrid entangled state separation unit and a feedback compensation unit, wherein the spinning-orbital angular momentum hybrid entangled state separation unit obtains spinning-orbital angular momentum hybrid entangled state photons through a polarization beam splitter, a polarization controller and a Q-plate phase plate; the separation unit realizes separation of horizontal polarization single photons from the spinning-orbital angular momentum hybrid entangled state photons through two beam splitters, two full reflectors and two dove prisms; the feedback compensation unit feeds back and transmits non-converted horizontal polarization light to the spinning-orbital angular momentum conversion unit for further conversion. The generation system disclosed by the invention realizes high-efficiency conversion of a high-purity spinning-orbital angular momentum hybrid entangled state, so that the system cost and the communication error rate are reduced, and the security of the system is enhanced.
Owner:GUANGDONG INCUBATOR TECH DEV CO LTD
Electron microscope
InactiveUS20110133084A1High resolutionVersatile in useThermometer detailsBeam/ray focussing/reflecting arrangementsPhase differenceImage resolution
An electron microscope according to the present invention includes a phase plate (510) having a thickness which changes in a radial direction, and adjusts a phase difference caused by a difference in electron beam path due to an effect of a spherical aberration when an electron beam is converged by a lens or an image of the electron beam is formed. Accordingly, the phase difference caused by the difference in electron beam path is adjusted, to thereby improve the coherence, so that a phase contrast image of transmitted electrons can be obtained at a higher resolution.
Owner:HITACHI HIGH-TECH CORP
Light-emitting device and light-emitting display with a polarization separator between an emissive layer and a phase plate
InactiveUS7012365B2Increase contrastEffective displaySolid-state devicesSemiconductor/solid-state device manufacturingDisplay devicePolarizer
Light-emitting devices and light-emitting displays for realizing bright display by allowing light emitted from an emissive layer to efficiently contribute to a display. Polarization separators are arranged between the emissive layer and a phase plate. In the light of a wavelength range which includes a part or all of a light-emission wavelength range of the emissive layer and is narrower than a visible wavelength range and is directed from the emissive layer side to the polarization separators side, the polarization separators reflect circularly polarized light components which are converted into linearly polarized light that is absorbed by the polarizer due to the operation of the phase plate and transmit the other light.
Owner:SAMSUNG DISPLAY CO LTD +1
Display device, and process for manufacturing display device
InactiveUS20130222317A1Improve display qualityReduce thicknessSolid-state devicesConductive pattern formationDisplay deviceEngineering
An X electrode (18) is provided on a surface of a phase plate (15) which surface faces a liquid crystal panel (10). A Y electrode (19) is provided on a surface of a polarizing plate (17) which surface faces the liquid crystal panel (10). This makes it possible to provide a display device that has a touch function and can reduce a thickness and improve display quality.
Owner:SHARP KK
On-chip thin film zernike phase plate and applications thereof
InactiveUS20140166880A1Efficient releaseImprove performanceNanotechMaterial analysis using wave/particle radiationElectrical and Electronics engineeringPhase plate
The present invention provides an on-chip thin film phase plate for a releasing charging, comprising a chip substrate having one or more apertures; and a thin film layer attached to the top surface of the chip substrate. The present invention also provides a method for observing organic material by TEM, which uses the above-mentioned on-chip thin film phase plate in a TEM system.
Owner:ACAD SINIC
Phase contrast imaging and preparing a tem therefor
ActiveUS20110174971A1Simplified phase plate positioningEasy to placeMaterial analysis using wave/particle radiationElectric discharge tubesOptical propertyX-Ray Phase-Contrast Imaging
New methods for phase contrast imaging in transmission electron microscopy use the imaging electron beam itself to prepare a hole-free thin film for use as an effective phase plate, in some cases eliminating the need for ex-situ fabrication of a hole and reducing requirements for the precision of the ZPP hardware. The electron optical properties of the ZPP hardware are modified primarily in two ways: by boring a hole using the electron beam; and / or by modifying the electro-optical properties by charging induced by the primary beam. Furthermore a method where the sample is focused by a lens downstream from the ZPP hardware is disclosed. A method for transferring a back focal plane of the objective lens to a selected area aperture plane and any plane conjugated with the back focal plane of the objective lens is also provided.
Owner:JEOL LTD
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