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77results about How to "Small divergence" patented technology
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Large building deformation monitoring device and monitoring method through large building deformation monitoring device
InactiveCN103105140AImprove linearitySmall divergenceUsing optical meansLaser transmitterLaser target
The invention discloses a large building deformation monitoring device and a monitoring method through the large building deformation monitoring device. A laser transmitter of the large building deformation monitoring device is composed of a laser controller, a laser power supply and a laser collimator, wherein the laser controller is connected with the laser power supply, and the laser power supply is connected with the laser collimator. A laser receiver is composed of a semi-permeable laser target, a light shield, an image sensor, and an attitude sensor, wherein the semi-permeable laser target is connected with the light shield, the light shield is connected with the image sensor, and the image sensor, the attitude sensor and a wireless transmitter are respectively connected with a microprocessor, and therefore the large building deformation monitoring device is formed. The method monitoring method through the large building deformation monitoring device includes that the laser transmitter is mounted at a reference position which is close to an object to be tested and is relatively fixed; the laser receiver is mounted at a point to be tested on a deformation surface; and the linear displacement, perpendicular to the deformation surface, of the laser receiver is the deformation value of the point. According to the large building deformation monitoring device, laser is utilized for testing deformation, and therefore the large building deformation monitoring device is convenient to install and test, high in accuracy, and suitable for long-time on-line monitoring of the deformation of large buildings.
Owner:TANGSHAN COLLEGE
Geodetic target object and measuring system
ActiveCN101198839ASmall divergenceIncrease signal strengthSurveyor's staffsMovable markersElectromagnetic radiationRadiation
Disclosed is a geodetic target object comprising at least one reflector surface, a receive channel with a detector (18) for receiving electromagnetic radiation (ES) transmitted by a measuring unit (2''), and a transmit channel with a radiation source (13'). The associated transmission port and / or reception port is / are integrated into the reflector surface or is / are embodied so as to adjoin the reflector surface such that radiation (RS) that is modulated for transmitting data can be transmitted in the direction of the measuring unit (2'') within the cross section (5'') of the radiation (ES) generated by the measuring unit (2'').
Owner:LEICA GEOSYSTEMS AG
Photoelectronic label, photoelectronic label reader-writer and method for reading and writing photoelectronic label
InactiveCN103903041ASmall divergenceIncrease transmit powerCo-operative working arrangementsRecord carriers used with machinesLight reflectionEngineering
The invention provides a photoelectronic label, a photoelectronic label reader-writer and a method for reading and writing the photoelectronic label. The photoelectronic label specifically comprises a photovoltaic conversion module, a demodulation module, a processor module, a modulation module and a light reflection module. The photovoltaic conversion module is used for receiving laser beams emitted by the photoelectronic label reader-writer and converting modulated optical signals into electric signals. The demodulation module is used for demodulating the electric signals output by the photovoltaic conversion module, and digital signals are obtained. The processor module is used for obtaining electric signal type communication data sent to the photoelectronic label reader-writer according to the digital signals obtained through demodulation. The modulation module is used for modulating the electric signal type communication data into optical signals. The light reflection module is used for reflecting the laser beams emitted by the photoelectronic label reader-writer, and loading the optical signals output by the modulation module to the reflected laser beams. The convenience for reading and writing the label can be improved.
Owner:CHINA TRANSINFO TECH CORP
Position identifying system and detection method of multi-layer linear array laser spot
ActiveCN101881597AWidely used valueReduce recognition errorsUsing optical meansLaser transmitterDisplay device
The invention relates to a position identifying system and a detection method of a multi-layer linear array laser spot. The position identifying system comprises a linear laser transmitter and a detection device, wherein the detection device comprises laser detectors, subsequent circuits, a single-chip machine, a display, an output interface and a power supply. According to the requirements of precision and length, a certain quantity of laser detectors are uniformly arranged and installed at certain intervals to form a linear array as one layer, multiple layers are made in parallel and then are used as one block, and multiple blocks are spliced to form the detection device. The linear laser transmitter forming a required certain position relation with the detection device transmits fan-shaped laser beams, the laser detectors induce the fan-shaped laser beams and generate electric signals which are processed and calculated by the subsequent circuits and the single-chip machine so that the laser detector in the center of the spot can be identified, and the position of the spot in the arrangement direction of the laser detector is obtained. The position information data can be directly displayed on the display and also be outputted by an output interface for other kinds of equipment.
Owner:CHINA UNIV OF MINING & TECH (BEIJING) +1
Fingerprint locating method and server
ActiveCN103442430ASmall divergenceSave resourcesSpecial data processing applicationsWireless communicationData miningSteady state
The invention discloses a fingerprint locating method and server. An establishing stage and an updating stage of a fingerprint database are carried out simultaneously, and the problem that a traditional fingerprint locating method firstly and manually establishes a fingerprint database to consume a lot of labor and materials and be small in coverage density and unchanged in fingerprint database is solved. In actual engineering application, the fingerprint database is automatically established and continuously updated automatically to keep pace with the environmental change, so that resources are saved, and the locating accuracy is improved. The fingerprint database is in a steady state finally and can further slowly adapt to the environmental change. In statistical time, the locating accuracy of the fingerprint locating method and server is stable, the fingerprint locating method and server is better than a traditional locating algorithm, and the divergence of the locating accuracy of the traditional locating algorithm on the same point in different moments is reduced.
Owner:COMBA TELECOM SYST CHINA LTD
Multi-mode fiber LIBS detector based on composite constraint enhanced spectrum
InactiveCN108362682AHigh sensitivityHigh sensitivity and high spectral signal-to-noise ratioAnalysis by thermal excitationFiberCollection system
The invention discloses a multi-mode fiber LIBS detector based on a composite constraint enhanced spectrum. The multi-mode fiber LIBS detector comprises a LIBS probe, a coupling collection system, anda control detection system, wherein the LIBS probe is composed of a fiber coupling head and a focusing chamber; the coupling collection system comprises a dichroscope, a fiber focusing device, and afiber collector; and the control detection system comprises a nanosecond laser, a spectrometer, a programmable pulse delay generator, an ICCD, and a computer. The multi-mode fiber is taken as a transmission medium, laser is focused to the surface of a to-be-measured sample to break induced plasma according to a convex lens imaging rule, and the element spectrum intensity is increased by a composite constraint enhanced plasma radiation method. The detector can realize simultaneous analysis of a plurality of elements, has the advantages of safe and reliable operation, high sensitivity, high measurement precision, high spectral signal-to-noise ratio, low element detecting limit, fast analysis speed, and high efficiency, realizes remote on-line monitoring, and can effectively satisfy the disadvantages of the traditional fiber LIBS detectors.
Owner:XI AN JIAOTONG UNIV
Surface emitting laser diode, optical scanning apparatus and image forming apparatus
InactiveUS20120294652A1High yield rateSmall divergence angleOptical resonator shape and constructionNanoopticsCurrent limitingOptoelectronics
A surface emitting laser diode comprises a substrate, a lower reflector formed over the substrate, an active layer formed over the lower reflector, an upper reflector formed over the active layer, a current restrict structure including a current confinement region surrounded by insulation region. The current restrict structure is disposed in an upper reflector or between an active layer and the upper reflector, and an upper electrode formed over the upper reflector includes an aperture which corresponds to an emission region from which light is emitted in a first direction perpendicular to a surface of a substrate. The emission region and the current restrict structure including the current confinement region are selectively configured to obtain high single transverse mode, stabilized polarization direction, isotropic beam cross section and small divergence angle, while allowing the device to he manufactured with high yield rate.
Owner:RICOH KK
Method and apparatus for producing an ion beam from an ion guide
InactiveUS7161146B2High densityImprove quality resolutionTime-of-flight spectrometersIsotope separationTrappingIon beam
A method and system for producing an ion beam from an ion guide. In the method, ions are introduced into the ion guide, a radio frequency trapping field is generated in the ion guide to confine ions in a direction transverse to a longitudinal axis of the ion guide, a DC potential is generated along the longitudinal axis to direct ion motion along the longitudinal axis, a strength of the radio frequency trapping field is reduced toward an ion guide exit of the ion guide, and the ions are transmitted from the ion guide exit to form the ion beam. In the system, an ion guide is configured to transmit ions in a longitudinal axis of the ion guide and configured to trap ions in a direction transverse to the longitudinal axis via a radio frequency trapping field. The ion guide includes a segmented set of electrodes spaced along the longitudinal axis and an ion guide exit at the last of the segmented set of electrodes. A radio frequency device is configured to supply the radio frequency trapping field such that a strength of the radio frequency trapping field is reduced toward the ion guide exit.
Owner:SCI & ENG SERVICES
Optical semiconductor light guide device having a low divergence emergent beam, application to fabry-perot and distributed feedback lasers
InactiveUS6141363ASimple waySmall divergenceOptical wave guidanceLaser active region structureDistributed feedback laserElectrical conductor
Optical semiconductor light guide device having a low divergence emergent beam, application to Fabry-P+E,acu e+EE rot and distributed feedback lasers. According to the invention, the core of the guide of the device comprises at least one semiconductor layer (8), whose refractive index is higher than that of each of the confinement or cladding layers (4, 6) of the guide and at least one second semiconductor layer (10), whose refractive index is lower than that of each of the confinement or cladding layers or close thereto. Application to optical telecommunications.
Owner:FRANCE TELECOM SA
Device and method for measuring shade number of automatic darkening welding filter
The invention discloses a device for measuring the shade number of an automatic darkening welding filter, comprising a laser, a photoelectric detector and a signal processing unit, wherein laser light emitted by the laser is received by the photoelectric detector after passing through the filter and then converted into an electric signal; and the electric signal is processed by the signal processing unit to obtain the shade number of the tested filter, wherein the wavelength of the laser light is 532 nm; and the computational formula of the signal processing unit is N=B+klog10I, wherein N is the shade number, I is a current or a voltage, and B and k are the parameters of the test system. The invention also discloses a method for measuring the shade number of an automatic darkening welding filter.
Owner:SHANGHAI INST OF WORK SAFETY SCI
Ion beam radiation field simulation parallel light field indication device and method
ActiveCN104338245AWith active sketching functionPrecise and fast indication of irradiation field contourX-ray/gamma-ray/particle-irradiation therapyTumor targetDot matrix
The invention relates to the technical field of radiation field simulation in ion beam distribution systems, in particular to an ion beam radiation field simulation parallel light field indication device and a an ion beam radiation field simulation parallel light field indication method. The device is characterized by comprising a rotating base, a translation pedestal and two groups of parallel beam laser indication units, wherein the parallel beam laser indication units are arranged on the translation pedestal, and can move relative to each other; each parallel beam laser indication unit is of a matrix structure formed by closely arranging a plurality of laser indication bars at an equal interval, and the laser indication bars are formed by connecting servo motor drivers with laser light sources; a single laser light source is transversely driven by the corresponding servo motor driver to reach an intersection of a radiation field outline and a movement path, and longitudinally emits a laser ray for indication along a beam direction, so that the two groups of laser indication units drive the laser light sources to simulate the radiation field outline, i.e. a light field, in a dot matrix mode according to equally-spaced sampling points of the radiation field outline. The device and the method have a radiation field laser indication and distance measurement functions, and also have a function of actively sketching a specific tumor target outline of a patient.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Method for generating atomic time scale through Algos and Kalman combination
InactiveCN105974777ASmall divergenceGood time scale stabilityApparatus using atomic clocksAlgorithmClock correction
The invention discloses a method for generating atomic time scale through the Algos and Kalman combination. The method includes the steps that firstly, original clock correction data is subjected to outlier detection; TA-K Hadamard variances in first six months are calculated to determine the weight of each clock to calculate the TA-K weight of the current month; then a result obtained through an improved Algos algorithm is used as input of a noise matrix and an initial value of the Kalman algorithm, and the weight of each clock is determined through the Hadamard variances; finally, the clock correction value at the next moment is predicted. By means of the technical scheme, the divergence of the Kalman algorithm can be reduced, and the time scale stability can be good.
Owner:BEIJING UNIV OF TECH
Variational Bayesian parameter learning method based harmonic current detection algorithm for electric vehicle charging station
ActiveCN109444505AReduce computational complexityImprove computing efficiencyCurrent/voltage measurementResourcesHarmonic phaseState space
The invention discloses a variational Bayesian parameter learning method based harmonic current detection algorithm for an electric vehicle charging station. The algorithm includes establishing a charger equivalent circuit model, and judging whether a charging pile can be randomly accessed into a power distribution network system by utilizing a random number algorithm and a comparison module; performing ideal superposition calculation on the harmonic current meeting gaussian normal distribution so that an ideal harmonic superposition coefficient calculation method can be obtained; and performing sampling on harmonic phase to form two sets of random set of state space and measurement space, obtaining model parameters through the lower bound of a logarithmic edge likelihood function by usinga variational Bayesian parameter learning method, continuously maximizing the lower bound of the likelihood function, and iteratively updating variational phase parameters until approximate distribution approaches the true posterior distribution of the parameters so that harmonic phase superposition detection can be realized. Actual harmonic superposition coefficients can be obtained by substituting harmonic phase distribution into the harmonic superposition coefficient calculation method, so that accurate detection of multi-harmonic current superposition at same time in a charging station can be realized.
Owner:YANCHENG POWER SUPPLY CO STATE GRID JIANGSU ELECTRIC POWER CO +2
Method and apparatus for producing an ion beam from an ion guide
InactiveUS20060163470A1High instrument sensitivityQuality improvementElectron/ion optical arrangementsIsotope separationTrappingIon beam
A method and system for producing an ion beam from an ion guide. In the method, ions are introduced into the ion guide, a radio frequency trapping field is generated in the ion guide to confine ions in a direction transverse to a longitudinal axis of the ion guide, a DC potential is generated along the longitudinal axis to direct ion motion along the longitudinal axis, a strength of the radio frequency trapping field is reduced toward an ion guide exit of the ion guide, and the ions are transmitted from the ion guide exit to form the ion beam. In the system, an ion guide is configured to transmit ions in a longitudinal axis of the ion guide and configured to trap ions in a direction transverse to the longitudinal axis via a radio frequency trapping field. The ion guide includes a segmented set of electrodes spaced along the longitudinal axis and an ion guide exit at the last of the segmented set of electrodes. A radio frequency device is configured to supply the radio frequency trapping field such that a strength of the radio frequency trapping field is reduced toward the ion guide exit.
Owner:SCI & ENG SERVICES
Network signal intensity detecting and fusing method
ActiveCN105323024ALow costSmall divergenceTransmission monitoringLocation information based serviceTime segmentComputer terminal
The invention discloses a crowdsourcing and Bayesian consistency estimation based network signal intensity detecting and fusing method. The network signal intensity detecting and fusing method comprises the following steps of detecting network signal intensity of each place by utilizing a smart phone terminal and uploading data to a database through a cellular network or a wireless network, wherein acquired data packets comprise the following information: detected network types, detected time buckets T, detected positions P and data S about the wireless signal intensity; sieving and classifying the data based on a sorting criterion; fusing each type of the data respectively and obtaining the signal intensity of one network at one position and at one time bucket; and displaying and outputting fusion results so as to enable a user to obtain the signal intensity of one network at one position and at one time bucket, marking the signal intensity range of the network in a map by using different colors, and updating as well as displaying signal intensities at different time buckets.
Owner:SHANGHAI JIAO TONG UNIV
Rail track measuring mark point positioning method
The invention discloses a rail track measuring mark point positioning method. A rail track measuring mark point positioning device comprises a track inspection trolley, a linear laser, a controller and a power supply, wherein the track inspection trolley runs on a steel rail; the linear laser is arranged on the track inspection trolley and is perpendicular to the edge of a side part of a running direction, and a laser line emitted by the linear laser is perpendicular to the edge of the side part of a track inspection trolley body; the controller is arranged on the track inspection trolley and is used for controlling the linear laser to be switched on or off; and the power supply is arranged on the track inspection trolley and is used for supplying power to the linear laser. The track inspection trolley runs on the steel rail, and when the laser line emitted by the linear laser passes through a CPIII pile point or fixed point arranged beside the steel rail, the position, projected on the surface of the steel rail, of the laser line is a mark point position for the track inspection trolley to stop. The rail track measuring mark point positioning method described by the invention can solve the technical problems that the existing rail track measuring mark point positioning method is high in cost, low in efficiency, low in accuracy and low in degree of automation.
Owner:ZHUZHOU TIMES ELECTRONICS TECH CO LTD
De-dispersion deflection device for high-energy electron beam
ActiveCN103140013ASmall divergenceMeet the use requirementsAcceleratorsHigh energyElectron acceleration
The invention belongs to the field of high-energy physical technologies, and particularly relates to a de-dispersion deflection device for a high-energy electron beam. The technical scheme includes that the de-dispersion deflection device for the high-energy electron beam comprises a vacuum box, a magnetic component, a coil, an input flange, a straight beam output window, a bending beam output window and a magnetic block blocking component. An electron beam enters to the inner portion of the vacuum box in the 20-degree horizontal included angle direction from left to right and the electron beam after being dispersed by the magnet A enters a magnet B, second-time deflection and dispersion are carried out under the action of magnetic fields, the direction of a magnetic field of the magnet B is just opposite to the direction of a magnetic field of a magnet A14, and therefore the electron beam after being diffused by the magnet A begins to gather in the magnet B and then enters a magnet C, under the action of a magnetic field of the magnet C, the electron beam deflects and gathers and then shoots out downwards, and 110-degree deflection is achieved. The de-dispersion deflection device for the high-energy electron beam enables the electron after being deflected to be less in divergence degree, using requirement of an electron acceleration scheduler is satisfied, meanwhile, total height of the electron acceleration scheduler is satisfied, and therefore effective using and operating space is effectively increased.
Owner:江苏海明医疗器械有限公司
Millimeter wave wireless charging device and method
ActiveCN106451666AReduced diffraction lossReduce the impactBatteries circuit arrangementsElectric powerPhysicsReflectivity
The embodiment of the invention discloses a millimeter wave wireless charging device which comprises a millimeter wave generator used for generating and emitting millimeter waves, wherein the millimeter waves are used for charging to-be-charged equipment. The device further comprises a laser sight and a rotating platform, wherein the laser sight is fixedly mounted on the millimeter wave generator and used for emitting and receiving laser beams; the laser beams and the millimeter waves are the same in emission direction; the millimeter wave generator is fixedly connected to the outer surface of the rotating platform; the rotating platform is used for adjusting the direction of the millimeter waves emitted by the millimeter wave generator through rotation. The laser sight is further used for calculating the corresponding reflectivity of the received laser beams and generating a first control signal used for controlling the rotating platform to pause rotating and a second control signal used for controlling the rotating platform to rotate according to the reflectivity. After the adoption of the millimeter wave wireless charging device provided by the invention, the wireless charging efficiency can be improved.
Owner:YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
Optical film of multilayer structure
The invention discloses an optical film of a multilayer structure. The optical film comprises a first surface, a second surface arranged in parallel in the opposite side of the first surface, and a stack of N positive-refractive-index micro layers, the stack of N positive-refractive-index micro layers is arranged between the first and second surface and are set as adjacent micro layers, the refractive indexes of the N-1 positive-refractive-index micro layers are decreased successively from the first surface to the second surface, the refractive index of the N th positive-refractive-index microlayers is greater than that of the (N-1)th positive-refractive-index micro layer, at least one negative-refractive-index micro layer is arranged among the Nth positive-refractive-index micro layer from the first surface to the second surface, so that the optical film of the multilayer structure has a high reflectivity for incident light from the first surface to the second surface and high transmittance for incident light from the second surface to the first surface.
Owner:SHENZHEN LONGLI TECH CO LTD
Structured light projector, optoelectronic device and electronic device
The present invention discloses a structured light projector, an optoelectronic device and an electronic device. The structured light projector comprises a laser emitter, a collimation element, a first diffraction element and a condensation element. The laser emitter is configured to emit laser. The collimation element is configured to perform collimation of laser emitted by the laser emitter. Thefirst diffraction element is configured to perform diffraction of laser after collimation by the collimation element. The condensation element is configured to collect laser after diffraction by thefirst diffraction element to reduce the laser divergence. The structured light projector, the optoelectronic device and the electronic device provided by the embodiment of the invention provide a condensation element to reduce the divergence of the whole light beam, in the axis Z direction, corresponding to an emitting laser pattern, and the energy of the laser cannot be attenuated too fast. Eventhough, a distance between a user and a structured light projector is large, an image collector can receive reflected laser with large energy so as to further generate a laser pattern with enough brightness after modulation by users and facilitate obtaining of a depth image.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Shaft rotating speed measuring device
InactiveCN111913003AAvoid affecting normal operationDoes not cause offsetDevices using optical meansLaser transmitterMeasuring instrument
The invention relates to the technical field of measuring equipment, and discloses a shaft rotating speed measuring device which comprises a measuring instrument and a baffle ring annularly arranged on a rotating shaft, a laser via hole is formed in the baffle ring, and the measuring instrument comprises a laser transmitter, a laser receiver, a mounting frame, a connecting frame and a main controller. The laser emitter and the laser receiver are both installed on the installation frame, the laser emitter is right opposite to the laser receiver, a baffle ring passage is formed between the laseremitter and the laser receiver, laser beams emitted by the laser emitter are perpendicular to the speed measurement direction, the installation frame is installed on the connection frame, the connecting frame is fixedly arranged, and the laser emitter and the laser receiver are electrically connected with the main controller; according to the invention, high rotating speed measurement precision and stable transmission performance can be achieved.
Owner:GUANGZHOU WENCHONG SHIPYARD CO LTD
Car body deformation detector based on laser transmission
The invention relates to a car body deformation detector based on laser transmission. The car body deformation detector comprises a front axle of a car and a rear axle as well as a first lateral axle and a second lateral axle located at two sides; a laser unit and a first metal reflecting plate are arranged on the front axle; a second metal reflecting plate is arranged on the first lateral axle; a third metal reflecting plate and a fourth metal reflecting plate are arranged on the rear axle; a receiving plate capable of detecting laser positions is arranged on the second lateral axle; the first metal reflecting plate, the second metal reflecting plate, the third metal reflecting plate, the fourth metal reflecting plate and the receiving plate are arranged vertically; laser emitted by the laser unit arrives at the receiving plate via the first metal reflecting plate, the second metal reflecting plate, the third metal reflecting plate and the fourth metal reflecting plate; the deformation position and the deformation degree of the car body are judged by the laser position on the receiving plate. The car body deformation detector based on laser transmission is quick and convenient to detect the deformation position and the deformation degree of the car body, is capable of positioning the whole deformation of the car body and has low detection cost.
Owner:ZHEJIANG UNIV
High-performance uvioresistant environment-friendly flame-retardant PC/ABS composite material and preparation method
InactiveCN110643165AImproves UV resistanceOvercome the defect of rapid yellowingButadiene DioxideAcrylonitrile
The invention belongs to the technical field of composite materials and particularly relates to a PC / ABS composite material. Based on 100% of the total mass of the PC / ABS composite material, the PC / ABS composite material comprises the following raw material ingredients in percentage by mass: 20%-80% of polycarbonate, 10%-60% of acrylonitrile-butadiene-styrene graft copolymer, 2%-11% of compatibilizer, 2%-10% of toughener, 1%-10% of compounded efficient flame retardant, 0.3%-1% of antioxidant and 0.3%-2% of light absorbent. According to the PC / ABS composite material disclosed by the invention,through action of all the ingredients, the ultraviolet resistance of the PC / ABS composite material is improved, the defect of rapid yellowing of the PC / ABS composite material is overcome, and meanwhile, the PC / ABS composite material can have the advantages that the mechanical properties are good, the divergence is low, interior trimming flame retardance requirements of new-edition transport business vehicle national standards (JT / T 1095-2016) are met, and the like.
Owner:江苏沃特新材料科技有限公司
Process for the adjustment of a laser light spot for the laser processing of work pieces and a laser device for the performance of the process
ActiveUS20120187099A1High beam qualitySmall divergenceWelding/soldering/cutting articlesLaser beam welding apparatusLaser processingBeam diameter
The invention relates to a process for the adjustment of a laser light spot of high intensity for the laser processing of work pieces as well as a laser device for performing the proposed process. The laser device comprises a laser emitting a laser beam and at least one focusing lens for converging the laser beam as well as an optical operating element for adjusting the beam diameter of the laser beam. The invention proposes to use as operating element a diffractive optical element that separates the laser beam emitted by the laser into partial laser beams, with the partial laser beams generated by the diffractive optical element being assembled to form a resulting laser beam that acts on the work piece. By means of a suitable design of the diffractive optical element it is possible to adjust, in particular enlarge, the diameter of the laser light spot as required.
Owner:LEISTER TECHNOLOGIES
High-brightness high-power semiconductor light-emitting device and preparation method thereof
ActiveCN114122913AGood divergence effectLow densityOptical wave guidanceLaser detailsCurrent limitingCarrier modulation
The invention discloses a high-brightness and high-power semiconductor light-emitting device and a preparation method thereof. The high-brightness and high-power semiconductor light-emitting device comprises a semiconductor substrate layer; the modulation structure is located on the semiconductor substrate layer and comprises a carrier modulation active layer; the modulation tunnel junction is positioned on one side, deviating from the semiconductor substrate layer, of the carrier modulation active layer; the cavity extension layer is positioned on one side, deviating from the carrier modulation active layer, of the modulation tunnel junction; the first active layer is located on the side, away from the semiconductor substrate layer, of the modulation structure, and the carrier concentration in the carrier modulation active layer is smaller than that in the first active layer; and the first current limiting layer is positioned on one side, deviating from the modulation structure, of the first active layer. The high-brightness and high-power semiconductor light-emitting device has the advantages of high integration level, high reliability and low cost while realizing high brightness and high power.
Owner:SUZHOU EVERBRIGHT PHOTONICS CO LTD +1
Preparation method for magnesium-aluminum alloy
The invention discloses a preparation method for a magnesium-aluminum alloy. The method comprises the following steps that (1) activating treatment and melting treatment are conducted, specifically, magnesium powder, aluminum powder, zinc powder, manganese powder, copper powder, silica powder, iron powder, nickel powder, beryllium powder and a rare earth compound and calcium silicate composition are placed into smelting equipment to be heated to 500-550 DEG C, subjected to activating treatment for 10-12 h under 3-10 MPa pressure conditions, then heated to 730-750 DEG C, and subjected to melting treatment for 8-10 h to obtain molten materials; and (2) die-casting forming is conducted, specifically, a secondary injection mode is adopted, the molten materials are compression-injected into a die with the surface coated with a release agent in a die-casting machine, and the finished magnesium-aluminum alloy is obtained. According to the preparation method for the magnesium-aluminum alloy, the material sources are wide, the cost is low, and the machining cost can be greatly lowered; and the prepared magnesium-aluminum alloy further has excellent mechanical performance, the application market for the magnesium-aluminum alloy is greatly expanded, and the alloy has wide popularization prospects.
Owner:广西庆达汽车零部件有限公司
Installation platform for sheet light source emitter in small wind tunnel PIV measurement system and using method of installation platform
The invention discloses an installation platform for a sheet light source emitter in a small wind tunnel PIV measurement system and a using method of the installation platform. The installation platform comprises a bottom installation platform, a leading screw motion system, a telescopic bending type support system and a hollow rotating installation system; the laser sheet light source emitter isfixedly mounted on a hollow rotation platform, and moves in a 3D space via the hollow rotation platform, the telescopic bending type support system and the bottom leading screw motion system. Thus, the laser sheet light source emitter is fixedly mounted, rotates and moves during a PIV experiment so that the sheet light source is arranged at any angle vertical to the bottom surface and two side surfaces of a wind tunnel, a developing paper arrangement platform is arranged to obtain an optimal irradiation distance of the sheet light source in a to-be-measured object, and thus, flow field data indifferent measurement planes can be collected accurately during small wind tunnel PIV test. The device can be suitable for PIV measurement experiments with different measurement plane requirements.
Owner:ZHEJIANG UNIV
Surface emitting laser diode, optical scanning apparatus and image forming apparatus
InactiveUS8774242B2Small divergenceHigh yield rateOptical resonator shape and constructionNanoopticsDivergence angleOptoelectronics
A surface emitting laser diode comprises a substrate, a lower reflector formed over the substrate, an active layer formed over the lower reflector, an upper reflector formed over the active layer, a current restrict structure including a current confinement region surrounded by insulation region. The current restrict structure is disposed in an upper reflector or between an active layer and the upper reflector, and an upper electrode formed over the upper reflector includes an aperture which corresponds to an emission region from which light is emitted in a first direction perpendicular to a surface of a substrate. The emission region and the current restrict structure including the current confinement region are selectively configured to obtain high single transverse mode, stabilized polarization direction, isotropic beam cross section and small divergence angle, while allowing the device to be manufactured with high yield rate.
Owner:RICOH KK
Body deformation detection device based on laser conduction
Owner:ZHEJIANG UNIV
Pole piece coating drying device and drying method
InactiveCN113210230AImprove energy utilizationSmall footprintPretreated surfacesCoatingsLight spotEngineering
The invention discloses a pole piece coating drying device. The device comprises a pole piece conveying mechanism, an isolation hood and a laser light source system, wherein the pole piece conveying mechanism is used for enabling a pole piece material roll subjected to coating to continuously pass through a laser drying area, the isolation hood is used for relatively isolating the laser drying area from an external environment, the laser light source system is arranged in the isolation hood, is used for outputting laser to dry the pole piece material roll and comprises a plurality of laser modules, each laser module comprises a plurality of laser units arranged in a width direction of the pole piece material roll, each laser module generates small-area light spots, widths of which are not less than a width of the pole piece material roll, and the plurality of laser modules are arranged in a length direction of the pole piece material roll, so that the small-area light spots generated by the plurality of laser modules are spliced into large-area light spots in the length direction of the pole piece material roll. The invention further discloses a pole piece coating drying method. According to the device and the method, uniform drying can be achieved on the whole assembly line, the drying forming efficiency of a pole piece coating is high, and the quality is good.
Owner:INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI
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