Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
1102 results about "Spectrum light" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
High efficiency incandescent bulb replacement lamp
InactiveUS7600882B1Good load response variationImprove efficiencyNon-electric lightingLighting support devicesColor rendering indexIncandescence
The invention discloses a high efficiency incandescent and Compact Fluorescent (CFL) bulb replacement LED lamp having a good color reproduction. The LED light bulb includes two groups of semiconductor light emitters and a luminescent material to emit four different spectrums of light. The two groups of semiconductor light emitters are enclosed around an interior wall of the light bulb housing, which has a plurality of fins at an exterior surface for effective heat dissipation. A high reflective member having a dome shape in the center is disposed under the two groups of semiconductor light emitters to redirect the emission and excitation lights from the two groups of semiconductor light emitters and recycle the backscattered light for multi-spectrum light mixing. The LED-light bulb further includes a single power line connecting to the two groups of semiconductor light emitters and a high efficiency electrical AC / DC conversion and control device. The light bulb has a diffuser dome for an output window and a conventional Edison-mount screw-type light bulb socket, a conventional fluorescent tube coupler arrangement or a conventional halogen MR-16 socket arrangement connecting to an AC power base. If a voltage is supplied to the AC / DC conversion and control device, a mixture light from the diffuser dome produces a warm white light with a color rendering index of at least 85 and a luminous efficacy of at least 80 lumens per watt.
Owner:LEDNOVATION
Narrow spectrum light source
ActiveUS7835417B2Low costAvoid disadvantagesLaser detailsCoupling light guidesVertical-cavity surface-emitting laserVertical-external-cavity surface-emitting-laser
An apparatus and method are disclosed for decreasing the spectral bandwidth of a semiconductor laser, such as a vertical cavity surface emitting laser.
Owner:OCTROLIX
Time division light output sensing and brightness adjustment for different spectra of light emitting diodes
InactiveUS8299722B2Electrical apparatusElectroluminescent light sourcesLighting systemLight-emitting diode
In at least one embodiment, brightness multiple LEDs is adjusted by modifying power to subgroups of the multiple LEDs during different times and detecting the brightness of the LEDs during the reductions of power. In at least one embodiment, once the brightness of the LEDs are determined, a controller determines if the brightness meet target brightness values, and, if not, the controller adjusts each LED with the goal meet the target brightness values. In at least one embodiment, a process of modifying power to the subgroups of multiple LEDs over time and adjusting the brightness of the LEDs is referred as “time division and light output sensing and adjusting. Thus, in at least one embodiment, a lighting system includes time division light output sensing and adjustment for different spectrum light emitting diodes (LEDs).
Owner:SIGNIFY HLDG BV
Image sensor with improved light sensitivity
ActiveUS20070177236A1Wide applicationShort exposure timeTelevision system detailsTelevision system scanning detailsColor imageColour image
An image sensor for capturing a color image is disclosed having a two-dimensional array having first and second groups of pixels, arranged in rows and columns, wherein pixels from the first group of pixels have narrower spectral photoresponses than pixels from the second group of pixels; and the placement of the first and second groups of pixels defining a pattern that has a minimal repeating unit including at least six pixels, so that at least some rows or columns of the minimal repeating unit are composed only of pixels from the second group and some rows or columns of the minimal repeating unit are composed only of pixels from the first group, wherein the rows or columns that are composed only of pixels from the first group are composed of at most two colors of pixels from the first group.
Owner:OMNIVISION TECH INC
Multispectral therapeutic light source
ActiveUS20140288351A1High cost-effectiveHigh quantum-efficiencyElectrotherapySurgeryUltravioletPeak value
A light source apparatus including light spectrum-converting materials that emit light primarily over large portions of the 360 nm-480 nm and the 590-860 nm spectral range is provided. This apparatus provides a cooled, high-luminance, high-efficiency light source that can provide a broader spectrum of light within these spectral ranges than has been cost-practical by using many different dominant peak emission LEDs. Up to 15% of the output radiant power may be in the spectral range 350-480 nm in one embodiment of this device, unless a specific separate source and lamp operating mode is provided for the violet and UV. Control methods for light exposure dose based on monitoring and controlling reflected or backscattered light from the illuminated surface and new heat management methods are also provided. This flexible or rigid light source may be designed into a wide range of sizes or shapes that can be adjusted to fit over or around portions of the bodies of humans or animals being treated, or mounted in such a way as to provide the special spectrum light to other materials or biological processes. This new light source can be designed to provide a cost-effective therapeutic light source for photodynamic therapy, intense pulsed light, for low light level therapy, diagnostics, medical and other biological applications as well as certain non-organic applications.
Owner:JONES GARY W
Producing low resolution images
ActiveUS20080131028A1Improve image qualityTelevision system detailsCharacter and pattern recognitionColor imageAmbient lighting
A method of processing an array of pixels captured by an image capture device, includes providing a first two-dimensional array having first and second groups of pixels wherein pixels from the first group of pixels have narrower spectral photoresponses than pixels from the second group of pixels and wherein the first group of pixels has individual pixels that have spectral photoresponses that correspond to a set of at least two colors and the placement of the first and second groups of pixels define a pattern that has a minimal repeating unit arranged to permit the reproduction of a captured color image under different lighting conditions; responding to ambient lighting conditions, whether panchromatic pixels are to be combined with color pixels; combining pixels to produce a second two-dimensional array of pixels which has fewer pixels than the first two-dimensional array of pixels; and correcting the color pixels.
Owner:OMNIVISION TECH INC
Methods of processing of gallium nitride
InactiveUS7015117B2Polycrystalline material growthFrom solid stateThermal energyElectrical conductor
A method for improving thermal dissipation in large gallium nitride light emitting diodes includes replacing sapphire with a better thermal conductor resulting in more efficient removal of thermal energy. A method for achieving a reliable and strong temporary bond between a GaN epitaxial layer and a support wafer. A method for transferring an epitaxial film from a growth substrate to a secondary substrate. An excimer laser initiates film delamination from the growth substrate. The laser beam is shaped by a shadow mask and aligned to an existing pattern in the growth substrate. A method for fabricating a LED that radiates white spectrum light. A phosphor that radiates a white spectrum after excitation in the blue or UV spectrum onto the GaN epitaxial wafer prior to die separation and packaging. A method for depositing a metal substrate onto a GaN epitaxy layer.
Owner:ALLEGIS TECH
Fiber-optic amplification of light pulses
ActiveUS7224518B2High energyAvoid disadvantagesLaser arrangementsActive medium materialFiberGroup velocity dispersion
A device for amplifying light pulses has an optical stretcher, in which the light pulses of a pulsed laser light source are temporally stretched, and an optically pumped amplifier fiber, in which the light pulses are amplified and, at the same time, temporally compressed. In order to improve such a system with regard to the pulse duration and the pulse energy that can be achieved, the amplifier fiber has a positive group velocity dispersion, whereby the amplifier fiber has non-linear optical properties, so that the optical spectrum of the light pulses is broadened during the amplification process, taking advantage of non-linear self-phase modulation.
Owner:TOPTICA PHOTONICS AG
All-fiber testing device for testing polarization crosstalk of optical device
ActiveCN102928198AImprove stabilityEliminate back lightTesting optical propertiesBeam splittingPolarizer
The invention provides an all-fiber testing device for testing the polarization crosstalk of an optical device. The all-fiber testing device comprises a wide-spectrum light source (501), a polarizer (511), a to-be-tested polarizing device (522), an optical path correlator (530), a difference detector (550) and a photoelectric signal conversion and signal recording device (560), wherein the wide-spectrum light source (501) is connected with the to-be-tested optical fiber device (522) through the polarizer (511) and a first rotary connector (521) and is connected with the optical path correlator (530) with a polarization beam splitting Michelson structure through a second rotary connector (523); and the optical path correlator (530) is connected with the polarization difference detector (550) through a third rotary connector (541) and is connected with an interference signal detecting and processing device (560). The all-fiber testing device has the advantages of small size, high measurement accuracy, high temperature and vibration stability and the like, so that the all-fiber testing device is widely applied to high-accuracy measurement and analysis of the polarization performance of the optical device.
Owner:HARBIN ENG UNIV
Multispectral therapeutic light source
ActiveUS8858607B1High cost-effectiveHigh quantum-efficiencyElectrotherapySurgical instrument detailsUltravioletPeak value
Owner:JONES GARY W
Device and method for improving polarization crosstalk measurement performance of optical device
ActiveCN102928199AFunction increaseIncrease signal amplitudeTesting optical propertiesCrosstalk measurementPolarizer
The invention provides a device and a method for improving polarization crosstalk measurement performance of an optical device. The device comprises a wide spectrum light source (301), a polarizer (311), a polarization device to be tested (632), an optical path correlator (640) and a polarization crosstalk detection and signal recording device (150), wherein the wide spectrum light source (301) is connected with the optical device to be tested (632) by the polarizer (311) and a first rotation connector (631) and then is connected with the optical path correlator (640) by a second rotation connector (633). By the device and the method, noise amplitude can be greatly suppressed, the sensitivity of polarization crosstalk measurement is improved, the dynamic range of polarization crosstalk measurement is expanded, and the device and the method are widely used for high-precision measurement and analysis on polarization performance of the optical device.
Owner:HARBIN ENG UNIV
Multi-spectrum lighting device with plurality of switches and tactile feedback
A multi-spectrum emitting device including one or more emitters configured to emit in a first non-visible light spectrum and a second visible light spectrum, and a switching mechanism with at least two switching elements. The switching mechanism is configured to require simultaneous activation of the at least two switching elements in order to change emissions from the first spectrum to the second spectrum. A tactile feedback mechanism is included to provide different tactile feedback for different emission modes of the device.
Owner:S & S PRECISION
Space division multiplexing Mach-Zehnder cascade type optical fiber interferometer and measurement method thereof
InactiveCN101324443ARealize sensingRealize measurementCoupling light guidesConverting sensor output opticallySensor arrayPhotodetector
The invention provides a space division multiplexing Mach-Zehnder cascade fiber interferometer and a measurement method thereof. The space division multiplexing Mach-Zehnder cascade fiber interferometer is composed of a wide-spectrum light source, a photodetector, a coupler, a single-mode connection optical fiber, an optical fiber sensor, a continuous-variable optical delay device, and a reflector, wherein the optical fiber sensor is composed of a Mach-Zehnder interferometer and forms a cascade optical fiber sensor array or a network. The wide-spectrum light source and a photodetector are connected with the optical fiber sensor through the coupler to form a sensor network; and the sensor network is connected with the continuous-variable optical delay device and the reflector through the coupler and is used for enquiring and demodulating the optical fiber sensor. The space division multiplexing Mach-Zehnder cascade fiber interferometer solves the problem of breakage of the optical fiber sensor array, improves the anti-damage characteristics of the optical fiber sensor array and the network and solves the temperature compensation problem in the measurement process. The space division multiplexing Mach-Zehnder cascade fiber interferometer has the advantages of simple interferometer structure, easy implementation, improved measurement reliability and low cost, and better facilitates the technology generalization and popularization.
Owner:HARBIN ENG UNIV
Method and system for determining energy content and detecting contaminants in a fluid stream
Methods and systems for real time, in situ monitoring of fluids, and particularly the determination of both the energy content and contaminants in a gas or oil transmission facility, are provided. The system may include two separate scanning sources to scan two different, but overlapping, NIR ranges, or may involve two separate scans from a single scanning spectroscopy source. The first scan ranges from approximately 1550 nm up through 1800 nm and a second scan concurrently scans at a high resolution across a band from approximately 1560-1610 nm, the wavelength of interest for hydrogen sulfide (though similar scans are contemplated in alternative wavelength ranges for alternative contaminants). The second scan may provide very narrow (0.005 nm) step resolution over just the wavelength of interest for the contaminant and may scan at a substantially higher power level. The spectroscopic optical data from the two scans, however obtained, must then be combined into an analytical processing module containing models that analyze the multi-scan data and yield both energy content and contaminant quantitative data.
Owner:JP3 MEASUREMENT
Projection system and light-emitting device thereof
ActiveCN102650811AReduce in quantityAvoid lostProjectorsColor photographyBeam splittingProjection system
The embodiment of the invention provides a projection system and a light-emitting device of the projection system. The light-emitting device comprises an exciting light source, a wavelength conversion device, a driving device and a beam splitting device. The exciting light source is used to generate exciting light; the wavelength conversion device comprises a wavelength conversion layer which converts at least part of the exciting light to excited light; and the excited light is wide-spectrum light or the light mixture of the excited light and the exciting light which is not converted by the wavelength conversion layer forms wide-spectrum light. The driving device is used to drive the exciting light to move in a manner relative to the wavelength conversion layer. The beam splitting device is used to split the wide-spectrum light into at least two types of monochromatic light which is transmitted along different paths. Through the manner, the costs of the projection system and the light-emitting device of the projection system provided by the embodiment of the invention can be reduced and the efficiency can be improved.
Owner:APPOTRONICS CORP LTD
Digital spectral identifier-controller and related methods
InactiveUS20020024665A1Low costAccurately distinguishingRadiation pyrometryAbsorption/flicker/reflection spectroscopyRelative magnitudeSensor array
A high speed, low cost, wide spectrum light scanning and sensor unit (10) for receiving reflected light from an object and diffracting the light into segments of wavelengths and a linear sensor array (32) having elements positioned to receive the segments and to measure the relative magnitude of such segments to define a spectral distribution of the object together with a digital identifier-controller (36) connected to said sensing device and having a memory for memorizing a spectral distribution of light representing a first standard object, and additional memory for receiving a spectral distributions of other objects and programmable logic circuitry containing a program for determining the similarity between the standard object and the other objects.
Owner:MASTEN OPTO DIAGNOSTICS
Novel method to generate high efficient devices which emit high quality light for illumination
ActiveUS20060197437A1Discharge tube luminescnet screensNanoinformaticsLight emitting deviceLight spectrum
What is disclosed is an electroluminescent apparatus comprising: an OLED device emitting light in the blue and green spectrums; and at least one down conversion layer, said down conversion layer absorbing at least part of the green spectrum light and emitting in at least one of the orange spectra and red spectra.
Owner:OSRAM OLED
Spectroscopic Beam Profile Overlay Metrology
ActiveUS20170082932A1Improve accuracyImprove precisionSemiconductor/solid-state device testing/measurementPhotomechanical apparatusMetrologyShaped beam
A spectroscopic beam profile metrology system simultaneously detects measurement signals over a large wavelength range and a large range of angles of incidence (AOI). In one aspect, a multiple wavelength illumination beam is reshaped to a narrow line shaped beam of light that is projected onto an overlay metrology target such that the direction of the line shaped beam is aligned with the direction of extent of a grating structure of the overlay metrology target. Collected light is dispersed across a detector according to AOI in one direction and according to wavelength in another direction. The measured signal at each detector pixel is associated with a particular AOI and wavelength. The collected light includes first order diffracted light, zero order diffracted light, or a combination thereof. In some embodiments, first order diffracted light and zero order diffracted light are detected over separate areas of the detector.
Owner:KLA TENCOR TECH CORP
Analytical multi-spectral optical detection system
InactiveUS20070098594A1Highly accurate fluorescent based measurementMinimize the numberMaterial analysis by optical meansChemical methods analysisPhysicsThrough transmission
Analytical multi-spectral optical detection systems and methods. A light source provides one or multiple lines (e.g., discrete wavelengths) of high spectral purity excitation light that is optically coupled to a sample via delivery fiber optic cables. Emission light is collected and provided to an emission detector, such as a diffraction gradient spectrophotometer emission detector, using collection fiber optic cables bundled with the delivery fiber optic cables in a probe interface positioned proximal a sample holder. The probe interface may be scanned over one or more samples, or one or more samples may be scanned proximal a fixed interface probe. Multiple excitation wavelengths allows for simultaneous excitation and detection of multiple fluorescent dyes in the visible spectrum. This increases sample throughput and reduces signal variations associated with signal acquisition at different times. The optical system provides several advantages over other systems including higher sensitivity, improved compatibility with fluorescent dyes, better signal discrimination, increased system reliability and reduced manufacturing and service costs.
Owner:ROCHE MOLECULAR SYST INC
On-line detecting method and apparatus for multi-component gas
InactiveCN101109701ARealize compositional analysisAchieve concentrationColor/spectral properties measurementsFiberFiber coupler
The invention provides a method for detecting on-line a multi-component gas and the testing arrangement for the method. The method comprises the following procedures: the current and temperature are tuned by a semi-conductor laser; after double modulation, the laser emitted from the semi-conductor laser passes an optic-fiber coupler, partial laser reaches to an open multi-optic-path pond, in which the emitted light that is absorbed by the gas to be measured is again transmitted through an optic fiber to a balance receiver; another partial laser from the optic-fiber coupler is also sent into the balance receiver; the signals picked up by the balance receiver is sent into a phaselocking amplifier after passing a pre amplifier, and then sent into a computer for processing after passing an A / D converter. The testing arrangement comprises a modulation signal generator, a laser driver, a laser spectrum light path, a signal conditioning circuit and a computer that are connected in sequence; the computer is additionally connected with the modulation signal generator, and connected with the laser spectrum optic path through a temperature detector / controller. The invention converts the precision controlling of temperature into the precision controlling of temperature, improves the sensitivity and opaqueness of the detection, so as to achieve the simultaneous testing of a plurality of components.
Owner:TIANJIN UNIV
Ambient spectrum light conversion device
ActiveUS20140277294A1High quantum yieldIncrease effective strengthLuminescent dosimetersFluorescence/phosphorescenceQuantum yieldConverters
Apparatus and methods to enhance light intensity within useful red to near-infrared spectral ranges, using direct or indirect sunlight, or from other ambient white light, are described. The disclosed devices provide high quantum yield photoluminescent ambient light spectrum conversion to increase the supplied energy primarily in the 590 nm-850 nm spectral range. These devices also pass much of the incident light in the spectral range in which the device's photoluminescent materials emit light, thereby greatly increasing the effective intensity of light available in the targeted 590-850 nm wavelength range. The ambient light conversion devices of the disclosure may be incorporated in apparel, bandage-like patches, converting reflectors, large area converters, awnings, window covers, and other articles, materials, and products. The converted light may be used in therapeutic treatments, horticultural and biotechnological applications, and other applications in which the converted light outputs of the present disclosure are beneficial.
Owner:JONES GARY W +1
Device and method for generating microwave signals by using multi-wavelength Brillouin laser
InactiveCN101807773APower spectrum distribution is flatSuppression of four-wave mixing effectsLaser using scattering effectsGratingPhotodetector
The invention relates to a device and a method for generating microwave signals by using a multi-wavelength Brillouin laser. An existing device obtains a high frequency difficultly. The device of the invention comprises an adjustable narrow-band light source, two isolators, three couplers, an erbium-doped optical fiber amplifier, two optical fiber circulators, a Sagnac loop mirror, an optical fiber Bragg grating and a photodetector. The adjustable narrow-band light source is in optical connection with the isolators; the isolators are in optical connection with the couplers; outputs of the couplers are in optical connection with another coupler respectively; one of optical paths is provided with the erbium-doped optical fiber amplifier, the two optical fiber circulators and the Sagnac loop mirror. The method for generating the microwave signals by using the device comprises the following steps that: pump spectrum light emitted by the adjustable narrow-band light source is split into two paths of pump spectrum light after passing through the isolators and the couplers, one path of the pump spectrum light performs beat frequency with the other path of the pump spectrum light after outputting single-channel high-order Stocks light so as to obtain high-frequency microwave signals. The device and the method change the wavelength of the pump spectrum light to make a multi-wavelength pass band continuously adjustable.
Owner:ZHEJIANG UNIV
Light source system and projection system
Owner:APPOTRONICS CORP LTD
Distributed optical fiber white light interference sensor array based on adjustable Fabry-Perot resonant cavity
InactiveCN101324445AWith common light path structureImprove temperature stabilityCoupling light guidesConverting sensor output opticallySensor arrayBeam splitter
The invention provides a distributed fiber white-light interference sensor array based on tunable Fabry-Perot resonant cavity, which is composed of a duplex photoelectric device, a tunable Fabry-Perot resonant cavity, a single-mode connection fiber and a sensor, wherein the tunable Fabry-Perot resonant cavity is composed of a scanning prism, a self-focusing lens, and a single-mode optical fiber with partial reflection surface; the duplex photoelectric device is composed of a wide-spectrum light source with a common base, an emitter and a collector, a photodetector, and a beam splitter prism; the beam with a certain spectral width is emitted by the light source to the resonant cavity directly through the beam splitter prism and is reflected multiple times by the left and the right surfaces of the resonant cavity to obtain a signal light; and the signal light outputted from the right cavity surface enters the sensor through the single-mode connection fiber, reflected by the left and the right end faces of the sensor, returns along the original path to the resonant, and is outputted from the left cavity surface to the photodetector. The distributed fiber white-light interference sensor array has a common light path structure and has the advantages of good temperature stability, simplest optical fiber path structure, low cost and high practicality.
Owner:HARBIN ENG UNIV
Tunable-frequency photoelectric oscillation device based on wide spectrum light source
ActiveCN103166706AEnables continuous tuningRealize continuously adjustableFibre transmissionElectromagnetic transmittersPhase noiseOptical fiber coupler
A tunable-frequency photoelectric oscillation device based on a wide spectrum light source comprises the wide spectrum light source, an optical filter, a first light amplifier, a second light amplifier, a first optical fiber coupler, a second optical fiber coupler, a third optical fiber coupler, a first polarization controller, a second polarization controller, a dimming-adjustable delay line, an photoelectric modulator, a color-dispersion optical fiber, a first photoelectric detector, a second photoelectric detector, a microwave amplifier, a first optical fiber patch cord, a second optical fiber patch cord, a third optical fiber patch cord, a fourth optical fiber patch cord, a fifth optical fiber patch cord, a sixth optical fiber patch cord, a seventh optical fiber patch cord, a first cable and a second cable. The tunable-frequency photoelectric oscillation device based on the wide spectrum light source can generate wideband-adjustable microwave signals, adopts a microwave photon filter to replace a traditional point filter, overcomes the defect that a traditional photoelectric oscillator based on wide spectrum source cutting can not generate signals at certain frequency points, and has the advantages of being low in cost, adjustable in wideband, and low in phase noise.
Owner:SHANGHAI JIAO TONG UNIV
Optical fiber sensor capable of simultaneously measuring hydrogen concentration and temperature
ActiveCN105841840ASimple preparation processLow costPhase-affecting property measurementsThermometers using physical/chemical changesGratingFiber gratings
The invention provides an optical fiber sensor capable of simultaneously measuring the hydrogen concentration and the temperature. The optical fiber sensor comprises a wide-spectrum light source 1, a sensing unit 2 and a spectrometer 3. The sensing unit 2 is composed of a single-mode optical fiber 21, a coreless optical fiber 22 and a single-mode fiber grating 23. The outside of the coreless optical fiber 22 is plated with a palladium-based hydrogen sensitive film. The light emitted from the wide-spectrum light source 1 passes through the single-mode optical fiber 21 to enter the coreless optical fiber 22, and is excited at a plurality of higher order modes within a fusion area 24. In the above modes, the lights are propagated inside the coreless optical fiber at different propagation constants and interfere with each other. An interference light signal enters the single-mode fiber grating 23, and will be reflected when meeting the Bragg reflection condition of the single-mode fiber grating 23. When the external hydrogen concentration changes, the interference spectrum will move. When the ambient temperature changes, both the interference spectrum and the Bragg reflection wavelength will move. Therefore, the hydrogen concentration and the temperature can be deduced through observing the movement amount of the interference spectrum and the movement amount of the Bragg wavelength. As a result, the high-precision measurement of the hydrogen concentration can be realized.
Owner:NORTHEASTERN UNIV
Super-continuum spectrum light source and coherent anti Stokes Raman scattering imaging system
InactiveCN103219638ARelatively small time delayImprove flatnessActive medium shape and constructionNon-linear opticsTime domainTime delays
The invention belongs to the technical field of photoelectricity, and provides a super-continuum spectrum light source and a coherent anti Stokes Raman scattering imaging system. The super-continuum spectrum light source comprises a laser which is used for generating laser pulses, and a super-continuum spectrum is generated through laser pulse pumping full-orthochromatic scattered photon crystal optical fibers. Due to the fact that the super-continuum spectrum is generated through the laser pulse pumping full-orthochromatic scattered photon crystal optical fibers, a single pulse is kept in a time domain, good flatness and continuity exist in a frequency domain, and high light spectrum power density is provided. Meanwhile, relative time delay between light spectrum components of different frequency is short, the spectrum consistency is good, and the light spectrum range is wide. Therefore, the super-continuum spectrum produced by the super-continuum spectrum light source is wide in application range.
Owner:SHENZHEN UNIV
Difference double-interference type optical fiber gyroscope based on birefringence modulation
ActiveCN102494681ARealize closed-loop controlAvoid loud noiseSagnac effect gyrometersClosed loopPolarization-maintaining optical fiber
The invention discloses a difference double-interference type optical fiber gyroscope based on birefringence modulation. The optical fiber gyroscope comprises a light source, a modulator, a coupler, an optical fiber ring, a polarization beam splitter, a first detector and a second detector, wherein the light source and the modulator are welded at a melting point O1 with an angle of 45 DEG; the modulator and a port A of the coupler are welded at a melting point O2 with an angle of 45 DEG; an end C of the coupler and one end of a polarization-maintaining optical fiber ring are welded at a melting point O3 with an angle of 0 DEG; an end D of the coupler and the other end of the optical fiber ring are welded at a melting point O4 with an angle of 90 DEG; an end B of the coupler and an input end of the polarization beam splitter are welded at a melting point O5 with an angle of 0 DEG; and two output ends of the polarization beam splitter are respectively welded to the first detector and the second detector. According to the invention, closed-loop control of the difference double-interference type optical fiber gyroscope is realized; and a wide-spectrum light source with very weak coherent characteristics is adopted, thereby avoiding strong noise brought by various stray wave interferences which are caused by strong coherent characteristics of a laser light source.
Owner:BEIHANG UNIV
Time division light output sensing and brightness adjustment for different spectra of light emitting diodes
InactiveUS20100148677A1Electrical apparatusElectroluminescent light sourcesLighting systemLight-emitting diode
In at least one embodiment, brightness multiple LEDs is adjusted by modifying power to subgroups of the multiple LEDs during different times and detecting the brightness of the LEDs during the reductions of power. In at least one embodiment, once the brightness of the LEDs are determined, a controller determines if the brightness meet target brightness values, and, if not, the controller adjusts each LED with the goal meet the target brightness values. In at least one embodiment, a process of modifying power to the subgroups of multiple LEDs over time and adjusting the brightness of the LEDs is referred as “time division and light output sensing and adjusting. Thus, in at least one embodiment, a lighting system includes time division light output sensing and adjustment for different spectrum light emitting diodes (LEDs).
Owner:SIGNIFY HLDG BV
White light microscopic interferometry system and method capable of acquiring spectral information
InactiveCN109781633ARealize multivariate measurementNovel thinkingPhase-affecting property measurementsUsing optical meansBeam splitterCatoptrics
The invention, belonging to the field of precision measurement, relates to a white light microscopic interferometry system and method capable of acquiring spectral information. The system comprises awide spectrum light source, a first beam splitter, a first microscope objective, a second beam splitter, a second microscope objective, a first CCD detector and a spectrum detecting module. Light emitted by the light source is split into reflected light and transmitted light by the beam splitters; the split light passes through a reference optical path and a test optical path; after the interfering on the beam splitters, the processed light is received by the CCD detector to obtain a surface microstructure of a to-be-tested plane; and the beam splitters are added into the test optical path, areflection optical signal containing the spectral information of the to-be-tested plane is introduced into the spectrum detection module to obtain an interference pattern, and Fourier transform calculation is carried out by a PC terminal to obtain spectral information. The employed ideal is novel; and the surface topography detection technology is combined with the Fourier transform spectroscopy principle, so that the surface stereoscopic shape and spectral information of the sample can be obtained simultaneously. Therefore, the multi-element measurement of the object is realized; and the experimental steps and time are saved.
Owner:SHANDONG UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com