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35results about How to "Avoid multiple reflections" patented technology
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Ultrasonography apparatus
InactiveUS20070239020A1Good diagnosisAvoid multiple reflectionsUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsUltrasonic transmissionSonification
An ultrasonic array probe is fixed to a rotational shaft at a predetermined angle, and thus a mechanical structure is made simple. An ultrasonic beam is electronically controlled so that an ultrasonic transmission / reception direction may become substantially perpendicular to the surface of the mamma. Thereby, data on the entire mamma including a C′ region can be collected only by the rotation of the probe. In addition, a membrane which is interposed between the probe and the mamma is formed to have a mesh-like structure, thereby reducing multiple reflection. Moreover, a B mode image and a C mode image are displayed at the same time, and thereby an accurate diagnosis can be performed in a short time.
Owner:KK TOSHIBA +1
Oct probe
InactiveUS20090190883A1Avoid ghostingAvoid it happening againMaterial analysis by optical meansCatheterLight beamLight source
An OCT probe has a sheath to be inserted into a subject; and an optical system within the sheath, for changing the direction of light which propagates from a light source through an optical fiber to irradiate the light onto the subject through a transparent portion of the sheath, and for reflecting the light beam, which is reflected by the subject, to guide the light into the optical fiber. A light output surface, for causing the light to be output from the reflecting surface in a direction obliquely inclined with respect to the inner surface of the sheath, and a reflected light sheath entrance preventing portion, for preventing light reflected by the inner surface of the sheath from entering the optical fiber, are provided in the optical system. The reflected light sheath entrance preventing portion may be formed by providing a cut planar surface portion on the lens.
Owner:NAMIKI PRECISION JEWEL CO LTD
Method for producing a light emitting device
InactiveUS7709282B2Light extraction efficiency can be improvedAvoid multiple reflectionsSolid-state devicesSemiconductor/solid-state device manufacturingEngineeringLight emitting device
Owner:MATSUSHITA ELECTRIC WORKS LTD
Near-infrared narrow-band optical filter used for somatosensory recognition system
The invention discloses a near-infrared narrow-band optical filter used for a somatosensory recognition system. The near-infrared narrow-band optical filter used for the somatosensory recognition system comprises a base plate and a narrow-band optical filter main film system and a cut-off film system which are respectively arranged on two opposite surfaces of the base plate. The narrow-band optical filter main film system and the cut-off film system are respectively stacked by high refractive index film layers and low refractive index film layers in alternative mode, the high refractive index film layers and the low refractive index film layers are deposited through a vacuum film coating method, and the central wavelength of a passing band of the narrow-band optical filter main film system is identical with that of an infrared emission light source of the somatosensory recognition system. The near-infrared narrow-band optical filter used for the somatosensory recognition system adopts the single base plate, and utilizes the scheme of stacking the main film system and the cut-off film system through double-face vacuum film coating; achieves the characteristics of being large in cut-off width, high in central wavelength transmission ratio and good in rectangular degree of the narrow-band optical filter of the somatosensory recognition system; reduces thickness of the optical filter; effectively prevents warping and deformation of the base plate caused by film layer stress; requires no optical adhesive; avoids multiple reflection; an can adapt to different temperature environments.
Owner:晋谱(福建)光电科技有限公司
Optical switch
An optical switch includes a first connector holding an end of at least one optical fiber and a second connector holding respective ends of at least two optical fibers. The optical switch further includes a sliding mechanism faces a connecting surface of the first connector and a connecting surface of the second connector each other, to optically connect between the at least one optical fiber held in the first connector and one of the at least two optical fibers held in the second connector, and slides the connecting surface of the first connector and the connecting surface of the second connector relative to each other with keeping a facing state, and a spacer mechanism for preventing the respective end faces of the facing optical fibers held in the first and second connectors from contacting each other, or from contacting the connecting surfaces of the first and second connectors, respectively.
Owner:HITACHI METALS LTD
Switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and method thereof
InactiveCN101556306AHigh impedanceAvoid multiple reflectionsCircuit interrupters testingMeasurement deviceImage resolution
The invention relates to a switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and a method thereof. A high-voltage electronic switch mode is adopted for controlling high-voltage pulse, and the electronic switch has the following advantages: the formed nanosecond pulse is simple and stable; the impedance is high under open-circuit condition; and the electronic switch can work under a repeated frequency mode. A designed pulse forming circuit can adjust the form of the pulse, the way of adding a matched resistance at the transmission end of the high-voltage pulse can prevent multiple reflections of the pulse, a designed capacitive voltage divider meets the need for high frequency measurement, and a peak holding circuit can record measurement requirements of high frequency continuous pulse. By adopting the experimental method, the time resolution of pulse experimental measuring medium recovery strength can also be improved, the observation accuracy of back-arc medium recovery physical process can be improved, and the quantitative analysis of time characteristic of breakdown development can be conducted. Simultaneously, due to the application of the continuous pulse, the consistency of experiment is further guaranteed, the experimental efficiency is improved, and the experimental cost is reduced.
Owner:XI AN JIAOTONG UNIV
LED chip and production method thereof
ActiveCN107689407AReduce leakage currentImprove stabilitySemiconductor devicesQuantum efficiencyElectricity
The invention discloses an LED chip and a production method thereof. The LED chip comprises a substrate and an extension structure arranged on the substrate, wherein the extension structure is dividedinto a plurality of LED primitive cells; peripheral side walls of the extension structure are provided with a side wall groove, and the side wall groove is used for reducing the total emission of thelight in the LED primitive cells; a primitive cell groove is formed between two adjacent LED primitive cells, the substrate is exposed by virtue of the bottom of the primitive cell groove, and the primitive cell groove reduces the total emission of the light in the LED primitive cells as well as the leak current; an insulation layer is arranged in the primitive cell groove; and a connection electrode covers the insulation layer, and the connection electrode electrically connects two adjacent LED primitive cells. In the technical scheme of the invention, the total emission of the light in theLED primitive cells is reduced by virtue of the side wall groove, the total emission of the light in the LED primitive cells and the leak current can be reduced by virtue of the primitive cell groove,so that the light emitting efficiency can be improved, the current leakage rate is reduced, and the external quantum efficiency can be improved.
Owner:XIAMEN CHANGELIGHT CO LTD
Device for receiving microwave radiation
ActiveUS20170179586A1Avoidance of undesirable multiple reflectionSave materialAntenna adaptation in movable bodiesRadiating elements structural formsMicrowaveCruise control
A device including a receiving antenna on a circuit board and a radome, multiple reflections of the received signals between the radome and the receiving antenna being avoided by using a polarization-rotating structure on the circuit board. The device may in particular be an integral part of a distance controller for adaptive cruise control of a motor vehicle.
Owner:ROBERT BOSCH GMBH
Solid-state imaging device and method for producing the same
InactiveUS20070057286A1Low production costReduce distanceSolid-state devicesSemiconductor/solid-state device manufacturingResistEngineering
A method for producing a solid-state imaging device, which including: a photoelectric conversion section; a charge transfer section having a charge transfer electrode; and an antireflection film covering a light-receiving region in the photoelectric conversion section, wherein forming the antireflection film includes: forming a sidewall on a lateral wall of the charge transfer electrode after forming the charge transfer electrode; forming an antireflection film on a substrate surface where the sidewall is formed; forming a resist on the antireflection film; melting and flattening the resist to expose the antireflection film on the charge transfer electrode; removing the antireflection film by using the resist as the mask; removing the sidewall; covering the charge transfer electrode with an insulating film; and forming a light-shielding film that reaches a level lower than the top surface of the antireflection film, and that surrounds the periphery of the antireflection film.
Owner:FUJIFILM CORP
Carrier
ActiveCN108693506AReduce distractionsSmall receiving areaWave based measurement systemsScattering cross-sectionFusiform shape
The invention relates to a carrier, and the carrier is shaped like a fusiform-like structure where a left end part and a right end part are pointed. The top of the carrier is provided with an installation groove for installing an antenna, and the distances between the installation groove and the left and right end parts are equal. A to-be-detected antenna can be installed in the installation groove, wherein the left side surface of the to-be-detected antenna is opposite to the left end part, and the right side surface of the to-be-detected antenna is opposite to the right end part. According to the technical scheme provided by the invention, a test signal is transmitted to the antenna installed on the carrier from the left side or right side of the carrier, so as to more accurately measurethe lateral radar scattering cross section area of the antenna during the testing of the lateral radar scattering cross section area of the antenna.
Owner:BEIJING INST OF ENVIRONMENTAL FEATURES
Projection screen apparatus, projection apparatus, and projection method
ActiveUS20160209669A1Improve visibilityHigh light transmittanceDiffusing elementsProjectorsProjection screenEngineering
A projection screen apparatus has: a display panel having an external panel surface and an internal panel surface; an actuator device by way of which an oscillating motion is impartable to at least a part of the projection screen apparatus; a diffuser screen, disposed adjacently to the internal panel surface, to which the oscillating motion with respect to the display panel is imparted by way of the actuator device; and a gap between the internal panel surface of the display panel and an inner surface of the diffuser screen directed toward the internal panel surface being filled at least in part with at least one viscoelastic filler material.
Owner:ROBERT BOSCH GMBH
High beam for automobile
The invention provides a high beam for an automobile. The high beam for the automobile comprises a light source body, a light reflecting bowl, a light shading device and a light refracting device; the light source body is arranged at the bottom center of the light reflecting bowl; the light shading device comprises a reflector and a support fixing the reflector into the light reflecting bowl; the light refracting device comprises a light refracting unit arranged on the inner wall of the light reflecting bowl; and the light refracting unit comprises a horizontal refracting sheet and an inclined refracting sheet. The high beam for the automobile is simple in structure and practical in function, avoids harm to the eyes of a head-on driver, solves the problems that because the high beam is used mistakenly, the driver on the opposite side becomes blind instantly and transiently and then traffic accidents may happen, and has application and popularization value.
Owner:华定谟
Reflector for area light source with emergent surface area of at least 10mm<2>
The invention relates to a reflector for an area light source with emergent surface area of at least 10mm<2>, which belongs to the technical field of illuminating lamps. The reflector is characterized by being bowl shaped inverted on a plane and comprises a central part as a bowl bottom and a side part as a bowl side; the central part is formed in such a way that a curve rotates along a central shaft of the bowl; the reflected light forms illumination distribution with central rotational symmetry on a target plane; the side part comprises a three-dimensional free continuous curve surface and can be also formed by discontinuously splicing the three-dimensional free strip curve surfaces; each strip curve surface is independent and continuous; and light distribution formed by the side part, light distribution formed by the central part and the distribution of light which is emitted by the area light source and directly formed without the processing of the reflector are superposed for compensation so as to realize any given light distribution. The invention has the advantages of high luminous efficiency, flexible light distribution and less invalid light.
Owner:TSINGHUA UNIV
Combined load shedding type sound barrier for high speed railway
InactiveCN103422450AExtended service lifeImprove noise reductionNoise reduction constructionSound barrierLoad Shedding
A combined load shedding type sound barrier for a high speed railway comprises an H-shaped column, upper unit plates and lower unit plates. The upper unit plates and the lower unit plates are inserted in the H-shaped column. The sound barrier is characterized in that the lower unit plates comprise a plurality of inclined inclining plates fixed on a vertical frame in an embedding mode at intervals, and a groove is formed in the middle of a cavity between opposite faces of any two inclining plates to form a silencing cavity with larger space. The upper end and the lower end of the vertical frame are connected with an upper frame and a lower frame to form a fixed frame. The fixed frame is inserted into the lower portion of the H-shaped column. The outer side of the upper frame is connected with a parabola-shaped skirt plate with an opening facing downwards, the lower portion of the skirt plate is connected with the lower frame through a plurality of transverse rods, and a sound absorbing material is bonded to the inner side of the skirt plate. Pulsating pressure exerted on the sound barrier can be reduced, service life of the sound barrier can be prolonged, and a good noise reducing effect is achieved.
Owner:SOUTHWEST JIAOTONG UNIV
Nonlinear optical device using noncentrosymmetric cubic materials for frequency conversion
InactiveUS20110317254A1Avoid multiple reflectionsNanoopticsLight demodulationNonlinear optical crystalGrating
This invention is directed to a new class of nonlinear optical device (NLO). For this purpose, in one aspect of this invention, a nonlinear optical device including a first nonlinear optical grating is presented. According to one version of the invention, the first nonlinear optical grating comprises a plurality of adjacent nonlinear optical units arranged in series. Each NLO unit has a single crystal segment and a polycrystalline segment. The single crystal segment is composed of a nonlinear optical crystal material and has its length adapted to provide the nonlinear optical effect. The polycrystalline segments are adapted in length to compensate the phase mismatch among the waves that occur in the single crystal segment.
Owner:PATEL NAVIN BHAILALBHAI
Semiconductor capable of preventing generating multiple reflection, and driving and setting method
InactiveCN1402350AReduce electricity consumption costsReduce manufacturing costTransistorTransmission control/equlisationElectrical resistance and conductanceEngineering
Owner:PS4 LUXCO SARL
Terahertz light guide antenna space power synthesizer
InactiveCN104076532AHigh detection sensitivityAvoid multiple reflectionsNon-linear opticsBeam splitterWide band
The invention discloses a terahertz light guide antenna space power synthesizer. The terahertz light guide antenna space power synthesizer comprises a femtosecond laser, a reflecting mirror, a 1 / 2 wave plate, a beam splitter, a precise displacement platform, a displacement platform controller, a polarizing film, a focusing lens, a photoconduction antenna, a terahertz lens, a zinc telluride electro-optical crystal, a 1 / 4 wave plate, a Wollaston prism, a photoelectric balance detector, a phase-locked amplifier, a high-voltage modulator and a data acquisition and processing system. The device can keep an ultra wide band of terahertz waves radiated by the photoconduction antenna, obtain terahertz waves higher than waves of a single photoconduction antenna in power and achieve power synthesis of terahertz waves radiated in a certain spatial point of two or more photoconduction antennae.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Supersonic wind tunnel and its determination method
ActiveCN103698100BReduce distractionsImprove accuracyAerodynamic testingObservation pointEngineering
The invention provides an ultrasonic wind tunnel and a determining method thereof. The ultrasonic wind tunnel comprises a stable section (40), a spray pipe (10) and a test section (20), wherein the stable section is used for rectifying airflow; the spray pipe is connected to the downstream of the stable section (40), the cross section of an outlet of the spray pipe (10) is in a first polygonal shape, and at least one of two angles formed by any edge and two adjacent edges of the first polygon is not equal to 90 degrees; the test section (20) is connected to the downstream of the spray pipe (10), and an inlet end of the test section (20) is matched with an outlet end of the spray pipe (10). Multiple observation points can be provided through the test section of the first polygon, and all-around observation can be provided, so that the experimental precision can be improved.
Owner:NAT UNIV OF DEFENSE TECH
Device for receiving microwave radiation
ActiveUS10276929B2Improve reception qualityAvoid multiple reflectionsAntenna adaptation in movable bodiesRadiating elements structural formsMicrowaveCruise control
Owner:ROBERT BOSCH GMBH
Implantable medical equipment
InactiveCN106730351AAvoid distortionAvoid multiple reflectionsHeart defibrillatorsAntenna adaptation in movable bodiesMedical equipmentRadiofrequency ablation
The invention discloses implantable medical equipment which comprises a shell, at least two radiofrequency antennas, RF (radiofrequency) communication circuits and antenna switches. The implantable medical equipment has the advantage that the purposes of preventing multi-path fading or distortion of the communication antennas, preventing repeated reflection of transmission signals between radiofrequency transmitters and radiofrequency receivers and guaranteeing the signal transmission accuracy can be achieved.
Owner:钟欣
Near-infrared narrow-band optical filter used for somatosensory recognition system
Owner:晋谱(福建)光电科技有限公司
Solid-state imaging device and method for producing the same
InactiveUS20090215217A1More reliabilityReduce positioningSolid-state devicesSemiconductor/solid-state device manufacturingResistPhotoelectric conversion
A method for producing a solid-state imaging device, which including: a photoelectric conversion section; a charge transfer section having a charge transfer electrode; and an antireflection film covering a light-receiving region in the photoelectric conversion section, wherein forming the antireflection film includes: forming a sidewall on a lateral wall of the charge transfer electrode after forming the charge transfer electrode; forming an antireflection film on a substrate surface where the sidewall is formed; forming a resist on the antireflection film; melting and flattening the resist to expose the antireflection film on the charge transfer electrode; removing the antireflection film by using the resist as the mask; removing the sidewall; covering the charge transfer electrode with an insulating film; and forming a light-shielding film that reaches a level lower than the top surface of the antireflection film, and that surrounds the periphery of the antireflection film.
Owner:FUJIFILM CORP
A detection method for early fatigue cracks of 316l stainless steel based on critical refraction longitudinal wave and vibration-acoustic modulation technology
ActiveCN111103359BImprove accuracyMultiple reflections are reduced or even avoidedAnalysing solids using sonic/ultrasonic/infrasonic wavesUltrasonic/sonic/infrasonic wave generationLongitudinal waveTransducer
The invention relates to a method for detecting early fatigue cracks of 316L stainless steel based on critical refraction longitudinal wave and vibration-acoustic modulation technology. The invention includes FPGA transmitting system, transmitting transducer, plexiglass wedge, receiving transducer, early fatigue crack, FPGA receiving system, 316L stainless steel component, FPGA transmitting system is connected with transmitting transducer, and transmitting transducer emits The low-frequency sine wave and high-frequency pulse train are injected into the plexiglass wedge at the first critical angle, and the sound wave entering the wedge only produces critical refraction longitudinal waves incident on the surface of 316L stainless steel components by using the principle of noise reduction, and the longitudinal waves interact with fatigue cracks A nonlinear damage signal is generated, and the detection signal is received by the receiving transducer and displayed and stored by the FPGA receiving system. The invention utilizes the combined detection method of the critical refraction longitudinal wave and the vibration-acoustic modulation to obtain relatively pure nonlinear damage signals, and further realizes the detection of early fatigue microcracks of 316L stainless steel.
Owner:CHINA JILIANG UNIV
Micro-machined imaging interferometer
ActiveUS20120327421A1Avoid multiple reflectionsImprove the overall coefficientRadiation pyrometryInterferometric spectrometryPrismPhysics
A micro-machined optical measuring device including: a set of photosensitive detector elements situated on a given face of a first support; a second support, assembled to the first support, forming a prism and including a first face through which a visible radiation is intended to penetrate and a second face, forming a non-zero angle θ with the first face and a non-zero angle α with the given face of the first support, the second face being semi-reflective, the first support and the second support being positioned such that an interferometric cavity is made between the second face and the given face, the distance between the given face of the first support and the second face of the second support varying regularly.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1
Ventilation device for temperature sensor array
PendingCN114430632AConsistent speedAvoid multiple reflectionsThermometer detailsCasings/cabinets/drawers detailsEngineeringPhysics
The invention discloses a ventilation device for a temperature sensor array, and belongs to the technical field of meteorological instruments. The device comprises a plurality of supporting columns which are parallel to one another, and the supporting columns are vertically arranged; a reflecting plate I and a reflecting plate II are respectively fixed at the head and tail ends of the plurality of supporting columns; a plurality of flow guide structures are arranged outside the whole supporting column in a sleeving manner in the length direction of the supporting column; the flow guide structure comprises two flow guide plates, each flow guide plate is in a convex circular truncated cone shape with an upper opening and a lower opening, and the two flow guide plates are symmetrically arranged; a flow guide opening is formed between the two flow guide discs, and the caliber of the flow guide opening is gradually increased from inside to outside. The drainage disc can guide airflow to enter the ventilation channel, so that the speeds of internal airflow and external airflow are basically consistent, and low-angle solar radiation in the morning and evening can be blocked.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
A carrier for testing the lateral radar cross section of the antenna
ActiveCN108693506BReduce distractionsSmall receiving areaWave based measurement systemsScattering cross-sectionRadar
The invention relates to a carrier, the shape of the carrier is a shuttle-like structure with sharp corners at the left end and the right end; the top of the carrier is provided with a mounting groove for mounting an antenna, and the mounting groove is respectively connected to the The distance between the left end and the right end is equal; the antenna to be tested can be installed in the installation groove, and the left side of the antenna to be tested is opposite to the left end, and the right side of the antenna to be tested is The face is opposite to the right end. The technical solution provided by the present invention transmits test signals from the left or right side of the carrier to the antenna installed on the carrier, so that when testing the lateral radar cross-sectional area of the antenna, the side of the antenna can be more accurately measured. Radar scatter cross-section.
Owner:BEIJING INST OF ENVIRONMENTAL FEATURES
An infrared stealth material and production equipment for preparing the material
Owner:YANGZHOUSRKLE INDAL
Switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and method thereof
InactiveCN101556306BAvoid multiple reflectionsEnsure consistencyCircuit interrupters testingMeasurement deviceCapacitive voltage divider
The invention relates to a switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and a method thereof. A high-voltage electronic switch mode is adopted for controlling high-voltage pulse, and the electronic switch has the following advantages: the formed nanosecond pulse is simple and stable; the impedance is high under open-circuit condition; and the electronic switch can work under a repeated frequency mode. A designed pulse forming circuit can adjust the form of the pulse, the way of adding a matched resistance at the transmission end of the high-voltage pulse can prevent multiple reflections of the pulse, a designed capacitive voltage divider meets the need for high frequency measurement, and a peak holding circuit can record measurement requirements of high frequency continuous pulse. By adopting the experimental method, the time resolution of pulse experimental measuring medium recovery strength can also be improved, the observation accuracy of back-arc medium recovery physical process can be improved, and the quantitative analysis of time characteristic of breakdown development can be conducted. Simultaneously, due to the applicationof the continuous pulse, the consistency of experiment is further guaranteed, the experimental efficiency is improved, and the experimental cost is reduced.
Owner:XI AN JIAOTONG UNIV
Method for accurately measuring optical parameters of edible oil
InactiveCN101532953BEasy to operateAvoid multiple reflectionsPhase-affecting property measurementsColor/spectral properties measurementsAdditive ingredientFourier transform on finite groups
Owner:CHINA JILIANG UNIV
A composite load-reducing sound barrier for high-speed railway
InactiveCN103422450BExtended service lifeImprove noise reductionNoise reduction constructionLoad SheddingSound barrier
A combined load shedding type sound barrier for a high speed railway comprises an H-shaped column, upper unit plates and lower unit plates. The upper unit plates and the lower unit plates are inserted in the H-shaped column. The sound barrier is characterized in that the lower unit plates comprise a plurality of inclined inclining plates fixed on a vertical frame in an embedding mode at intervals, and a groove is formed in the middle of a cavity between opposite faces of any two inclining plates to form a silencing cavity with larger space. The upper end and the lower end of the vertical frame are connected with an upper frame and a lower frame to form a fixed frame. The fixed frame is inserted into the lower portion of the H-shaped column. The outer side of the upper frame is connected with a parabola-shaped skirt plate with an opening facing downwards, the lower portion of the skirt plate is connected with the lower frame through a plurality of transverse rods, and a sound absorbing material is bonded to the inner side of the skirt plate. Pulsating pressure exerted on the sound barrier can be reduced, service life of the sound barrier can be prolonged, and a good noise reducing effect is achieved.
Owner:SOUTHWEST JIAOTONG UNIV
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