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42 results about "Pulse radiation" patented technology

Device and method for spatially resolved photodetection and demodulation of modulated electromagnetic waves

A device and method for spatially resolved photodetection and demodulation of temporally modulated electromagnetic waves makes it possible to measure phase, amplitude and offset of a temporally modulated, spatially coded radiation field. A micro-optical element (41) spatially averages a portion (30) of the scene and equally distributes the averaged intensity on two photo sites (51.1.51.2) close to each other. Adjacent to each of these photo sites (51.1) are two storage areas (54.1, 54.2) into which charge from the photo site can be moved quickly (with a speed of several MHz to several tens or even hundreds of MHz) and accumulated essentially free of noise. This is possible by employing the charge-coupled device (CCD) principle. The device combines a high optical fill factor, insensitivity to offset errors, high sensitivity even with little light, simultaneous data acquisition, small pixel size, and maximum efficiency in use of available signal photons for sinusoidal as well as pulsed radiation signals. The device and method may be used in a time-of-flight (TOF) range imaging system without moving parts, offering 2D or 3D range data.
Owner:AMS SENSORS SINGAPORE PTE LTD

Pulse sorting apparatus for frequency histogramming in a radar receiver system

Disclosed is a real-time pulse sorting apparatus of a preprocessor in a pulsed radiation detection system. The apparatus, responsive to digital signals generated by a system receiver, uses the instantaneous frequency as the address input to store discrete data groups in main memory. Each data group, comprising the digital data corresponding to a single analog-to-digital converter sample point, includes the RF signal amplitude, inter-channel phase difference, instantaneous frequency as well as a unique pulse number generated by the pulse sorting apparatus. The present invention further includes a TOA memory for storing the time-of-arrival of each pulse at an address given by the pulse number. The main memory, organized in the form of a frequency-based histogram, together with the TOA memory, linked to the main memory by means of the pulse number pointer, sorts and records RF signal data with minimal processor control and intervention.
Owner:NORTHROP GRUMMAN SYST CORP

Radar sensor for use with automobiles

The invention relates to a radar sensor (10) for use with automobiles. Said radar sensor emits pulsed radiation. The radar sensor is characterized in that it comprises an antenna with at least one layer-structured block (34) consisting of metal layers (36, 38, 40, 42) which are arranged according to the Yagi principle and which are respectively separated from each other by a dielectric intermediary layer (46, 48, 50). At least one of the metal layers (36, 38, 40, 42) is excited by a supply system (18) with a radar frequency.
Owner:VALEO SCHALTER & SENSOREN

Photo-acoustic spectrometer apparatus

The photoacoustic detection chamber (6) is located in the optical cavity (3) of the cavity-enhanced absorption spectroscopy device (3, 4, 5). When the sample in the chamber (6) absorbs radiation from the pulsed radiation beam coupled into the cavity (3), pressure waves detected by the microphone (9) are generated. The detection signal (10) output by the microphone (9) can be processed to determine the concentration value of the absorbing material in the sample.
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV

Method and device for cutting wafers

A method is described of radiatively cutting a wafer, the method comprising the steps of low power cutting of two trenches followed by high power cutting of a fissure. A single pulsed radiation beam is split into a first pulsed radiation beam for cutting at least one of the trenches and a second pulsed radiation beam for cutting the fissure. When cutting a fissure on the wafer in a cutting direction along a cutting street, the first and second radiation beams are directed simultaneously with the first radiation beam leading and the second radiation beam trailing. For cutting a fissure in the opposite cutting direction, a third pulsed radiation beam for trenching is split from said single pulsed radiation beam.
Owner:ASMPT SINGAPORE PTE LTD

Accurate photo detector measurements for lidar

A light ranging system can include a laser device and an imaging device having photosensors. The laser device illuminates a scene with laser pulse radiation that reflects off of objects in the scene.The reflections can vary greatly depending on the reflecting surface shape and reflectivity. The signal measured by photosensors can be filtered with a number of matched filter designed according to profiles of different reflected signals. A best matched filter can be identified, and hence information about the reflecting surface and accurate ranging information can be obtained. The laser pulse radiation can be emitted in coded pulses by allowing weights to different detection intervals. Other enhancements include staggering laser pulses and changing an operational status of photodetectors ofa pixel sensor, as well as efficient signal processing using a sensor chip that includes processing circuits and photosensors.
Owner:OUSTER INC

Method for multiplying super-broadband electromagnetic impulse radiation and system therefor

A method for multiplying super wide band electromagnetic pulse radiation includes generating multipath super short layer pulse by super short pulse laser and outputting them to light guide switch array then coupling them to light guide switch with offset voltage, outputting multipath super short electric pulse by said switch array then sending them to super wide band antenna array, converting super short electric pulse to be super wide band electromagnetic pulse radiation, carrying out space coherent synthesis on said electromagnetic pulse emitted by said antenna to form multiplication electromagnetic pulse radiation.
Owner:陕西光电子先导院科技有限公司

Electromagnetic pulse radiation field test probe, test system and test method

The invention discloses an electromagnetic pulse radiation field test probe, a test system and a test method. The probe comprises an electrically small monopole antenna, a metal shielding shell and anelectro-optical conversion circuit; one end of the electrically small monopole antenna is positioned outside the metal shielding shell; the other end of the electrically small monopole antenna penetrates through an antenna lead-in hole in the metal shielding shell and then enters the metal shielding shell; and the end part of the electrically small monopole antenna entering the metal shielding shell is electrically connected with the signal input end of the electro-optical conversion circuit; and the signal output end of the electro-optical conversion circuit is the optical signal output endof the test probe. The probe has the advantages of wide working frequency range, large dynamic range, adjustable sensitivity, simple circuit structure, easiness in miniaturization and the like.
Owner:ARMY ENG UNIV OF PLA

Laser processing method, method for manufacturing ink jet recording head using such method of manufacture, and ink jet recording head manufactured by such method of manufacture

A laser processing method for performing laser ablation process on a work piece by radiating laser beam on the work piece includes the step of forming simultaneously a plurality of process shapes arranged at a predetermined interval by use of laser beam of plural pulses having extremely large spatial and temporal energy density radiated from a laser oscillator as the laser beam oscillating at the pulse radiation time of one picosecond or less. With the laser processing method thus structured, it is possible to perform a highly precise processing without creating by-product, as well as to fundamentally prevent the converted thermal energy from being accumulated on a work piece, such as resin, which causes the work piece to be fused or thermally expanded during the operation of laser processing.
Owner:CANON KK

X-ray radiation field detecting device and X-ray radiation field detecting method based on semiconductor laser device

The invention belongs to the field of pulse radiation detection, and particularly relates to an X-ray radiation field detecting device and an X-ray radiation field detecting method based on a semiconductor laser device. The detecting device comprises a radiation detector and laser power measuring and recording equipment. The radiation detector is in optical path connection with the laser power measuring and recording equipment through an optical fiber or a laser focusing and transmitting device. The radiation detector comprises the semiconductor laser device and an external power supply for supplying pre-bias current to the semiconductor laser. The current which is supplied by the external power supply is larger than or equal with the threshold current of the semiconductor laser. The X-ray radiation field detecting device performs direct modulation on active-region carriers of the semiconductor layer by means of X-ray, thereby realizing disturbance on output power of the semiconductor laser. X-ray pulse information is finally acquired through measuring change of an output laser signal. The X-ray radiation field detecting device based on the X-ray radiation field detecting method has advantages of simple structure, low cost, ultra-short response time, etc. Furthermore laser is used as a signal characteristic.
Owner:NORTHWEST INST OF NUCLEAR TECH

Silicon-ytterbium-ion-codoped YAG superfast scintillating crystal and preparation method thereof

The invention relates to a silicon-ytterbium-ion-codoped YAG superfast scintillating crystal and a preparation method thereof. The chemical formula of the silicon-ytterbium-ion-codoped YAG crystal is Yb3xY3(1-x)Si5yAl5(1-y)O12, wherein x=0.05-0.3, y=0.0001-0.01, x is the doping amount of matrix Yb ions, y is the doping amount of Si ions, the Yb ions enter the crystal to replace Y ion sites, and the Si ions replace Al ion sites. The Yb3xY3(1-x)Si5yAl5(1-y)O12 superfast scintillating crystal prepared by the method is high in light yield, high in irradiation damage resistance, applicable to fields such as superfast pulse radiation detection, inertia confined fusion, space radiation detection and nuclear reaction kinetics researches, and the like.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Pulsed DC testing system and method of GaN HEMT microwave power device

ActiveCN103344851AThermal effectElectrical testingPulse radiationPulsed DC
The invention discloses a pulsed DC testing system and method of a GaN HEMT microwave power device. A vector network analyzer is used for testing the S parameter of the GaN HEMT microwave power device, or a semiconductor analyzer is used for testing the pulse direct current characteristic of the GaN HEMT microwave power device. The two output ends of the vector network analyzer or the semiconductor analyzer respectively load pulse radiation frequency signals to the grid electrode and the drain electrode of a tested GaN HEMT device through a Bias Tee. Two DC power supplies with different voltage grades are respectively loaded on two Bias Tees through two groups of switches. According to the pulsed DC testing system and method of the GaN HEMT microwave power device, when the GaN HEMT microwave power device is tested, pulse DC voltages are used, two groups of switch circuits control the DC power supplies applied on the Bias Tees to be connected, and the automatic heating phenomenon of the GaN HEMT and the performance deterioration of the microwave power device caused by continuously applying of the DC voltages on the GaN HEMT are avoided.
Owner:江苏博普电子科技有限责任公司

Pulsed solar simulator with improved homogeneity

ActiveUS20040223325A1Quicker and more homogenous ignitionLow powerElongate light sourcesPhotometryPulse radiationElectromagnetic radiation
Solar simulator that includes a pulsed radiation source for generating electromagnetic radiation, and at least one mirror element is arranged in a region of the radiation source. The at least one mirror element is structured and arranged to reflect components of radiation from the radiation source essentially in an intended irradiation direction. Further, the at least one mirror element, formed at least in part of metal, is positioned adjacent to the radiation source and is structured to receive at least a part of an ignition voltage of the pulsed radiation source. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
Owner:AIRBUS DEFENCE & SPACE

Projection data acquisition apparatus

The invention relates to a projection data acquisition apparatus (31) for acquiring projection data. The projection data acquisition apparatus comprises a radiation device (32) for generating a pulsed radiation beam (4) for traversing an object and a detection device (6) for generating projection data being indicative of the pulsed radiation beam (4) at different acquisition positions, wherein the radiation device (32) is adapted to generate the pulsed radiation beam (4) such that at different acquisition positions the pulsed radiation beam (4) has different shapes, i.e. is differently blocked and / or attenuated. Thus, not the complete radiation providable by the radiation device is used at each acquisition position, but at least at some acquisition positions only a smaller pulsed radiation beam is used. This can lead to less scattered radiation and hence to improved projection data and an improved computed tomography image, which may be reconstructed based on the acquired projection data.
Owner:KONINKLJIJKE PHILIPS NV

Silicon-on-insulator latch-up pulse-radiation detector

A radiation detector formed using silicon-on-insulator technology. The radiation detector includes a silicon layer formed on an insulating substrate, wherein the silicon layer includes a PNPN structure, and a gate layer formed over the PNPN structure, wherein the gate layer includes a PN gate. Latch-up occurs in the radiation detector only in response to incident radiation.
Owner:TAIWAN SEMICON MFG CO LTD

Radio frequency front-end electromagnetic pulse protection module

The invention belongs to the technical field of strong electromagnetic pulse protection, and particularly relates to a radio frequency front-end electromagnetic pulse protection module which is suitable for satellite navigation positioning communication equipment. The protection module is used for carrying out strong electromagnetic pulse protection on the satellite navigation positioning communication equipment. The protection module comprises a first transient suppression circuit, a band elimination filter, a second transient suppression circuit and a shielding shell. Compared with the priorart, by using the protection module provided by the invention, problems of low bearing power and a low response speed of an existing radio frequency front-end protection module can be solved; and a power bearing capacity of the protection module is improved to a 10KW level, and the response time is reduced to be within 1ns so that effective protection of the radio frequency front end of the satellite navigation positioning communication equipment under an electromagnetic pulse radiation field is realized.
Owner:北京京航计算通讯研究所

Improved pulse processing instrument

An improved pulse processing instrument produces modulated radiation wave. It includes pulse sequence generator, input power transformer, driver circuit, far infrared radiator, to which the modulated and encoded signal from the driver circuit is added. The modulated and encoded signal in each period has two fixed-length continuous pulse sequences, and each pulse sequence in one period includes four pulses with equal occupied width and four unequal intervals. The pulse radiation of the present invention can decrease free radical concentration in processed food or drink by 10.2-47.4 %, and eating or drinking the processed food or drink can eliminate free radical inside human body, raise immunity and delay senility.
Owner:吴思远

Method and device for measuring a distance to a target in a multi-user environment using at least two wavelengths

A method for measuring a distance to a target in a multi-user environment, comprising: irradiating the environment by a series of light pulses, wherein this series of light pulses is emitted by a battery of at least two or a single light source device emitting on at least two different wavelengths, the light pulses being emitted at a determined repetition rate and with a determined randomly selected wavelength; collecting pulses reflected or scattered from the environment to at least one detector equipped with a wavelength filter whose pass band corresponds to the selected emitted wavelength; assigning a timestamp at the detection of a pulse by at least one chronometer connected to the detector, said timestamps corresponding to the time of arrival (TOA); determining the statistical distribution of said time of arrivals; determining the distance to the target from said statistical distribution.
Owner:FASTREE3D

Orthopaedic bearing material

Disclosed is a polymeric orthopaedic bearing material for use as an implant material or part thereof comprising one or more crosslinked regions and one or more non-crosslinked or substantially non-crosslinked regions at the surface. The bearing material can be prepared from a crosslinkable polymer, e.g., ultrahigh molecular weight polyethylene. The orthopaedic bearing material has an advantageous combination of at least one wear property and at least one mechanical property. Also disclosed are processes for producing orthopaedic bearing materials, for example, by irradiating a raw material in consolidated form through a radiation mask having a perforated pattern for crosslinking selected regions of the raw material, and optionally shaping the raw material into a bearing material. Alternatively, a pulsed radiation beam can be used for crosslinking.
Owner:DEPUY PROD INC

Optical power modulation at high frequency

InactiveUS7706420B2High frequency pulsed laser modulationLaser detailsPhotomechanical apparatusPulse radiationPower modulation
An apparatus for providing a pulsed radiation beam has a radiation source providing a pulsed radiation beam at a constant pulse repetition frequency. A beam deflector in the path of the pulsed radiation beam is actuable to redirect the pulsed radiation beam cyclically towards each of a plurality of beam intensity modulators in turn. A beam recombiner combines modulated light from each of the plurality of beam intensity modulators in order to form the modulated pulsed radiation beam at the constant pulse repetition frequency.
Owner:CORNING INC

Ultrahigh frequency electromagnetic pulse sensor characteristic calibration method and system

The invention discloses an ultrahigh frequency electromagnetic pulse sensor characteristic calibration method and system, and belongs to the technical field of sensor characteristic calibration. According to the ultrahigh-frequency electromagnetic pulse sensor characteristic calibration method based on the single-cone antenna, a mirror single-cone calibration system is formed by constructing a high-power subnanosecond leading-edge pulse source and the mirror single-cone antenna, the high-power subnanosecond leading-edge pulse source is an all-solid-state pulse source based on an avalanche transistor, and the mirror single-cone antenna is an all-solid-state pulse source based on an avalanche transistor. The ultrahigh-frequency electromagnetic pulse sensor calibration device can be used for realizing calibration of an ultrahigh-frequency electromagnetic pulse sensor, so that the leading edge of an output pulse reaches a hundred ps magnitude and the peak voltage reaches a kV magnitude, a high-field-intensity subnanosecond electromagnetic pulse standard field environment can be generated, and calibration of a high-amplitude fast-leading-edge ultrahigh-frequency electromagnetic pulse sensor can be realized. Therefore, the GIS comprehensive pulse radiation environment measurement level is greatly improved, the calibration problem of the high-amplitude fast-leading-edge ultrahigh-frequency electromagnetic pulse measurement sensor is solved, and the scheme is simple, practical, feasible and convenient to implement.
Owner:ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1

Projection data acquisition apparatus

The invention relates to a projection data acquisition apparatus (31) for acquiring projection data. The projection data acquisition apparatus comprises a radiation device (32) for generating a pulsed radiation beam (4) for traversing an object and a detection device (6) for generating projection data being indicative of the pulsed radiation beam (4) at different acquisition positions, wherein the radiation device (32) is adapted to generate the pulsed radiation beam (4) such that at different acquisition positions the pulsed radiation beam (4) has different shapes, i.e. is differently blocked and / or attenuated. Thus, not the complete radiation providable by the radiation device is used at each acquisition position, but at least at some acquisition positions only a smaller pulsed radiation beam is used. This can lead to less scattered radiation and hence to improved projection data and an improved computed tomography image, which may be reconstructed based on the acquired projection data.
Owner:KONINKLJIJKE PHILIPS NV

Laser processing method, mfg. of ink jetting recording head using said method, and the recording head therefrom

A laser processing method for performing laser ablation process on a work piece by radiating laser beam on the work piece includes the step of forming simultaneously a plurality of process shapes arranged at a predetermined interval by use of laser beam of plural pulses having extremely large spatial and temporal energy density radiated from a laser oscillator as the laser beam oscillating at the pulse radiation time of one picosecond or less. With the laser processing method thus structured, it is possible to perform a highly precise processing without creating by-product, as well as to fundamentally prevent the converted thermal energy from being accumulated on a work piece, such as resin, which causes the work piece to be fused or thermally expanded during the operation of laser processing.
Owner:CANON KK

Measuring method of up-conversion intermediate energy level lifetime of erbium ions

InactiveCN101788485BAvoiding Double Beam ProblemsAvoid Fast Ion Beam Laser TechnologyFluorescence/phosphorescencePulse radiationUp conversion
The invention discloses a measuring method of up-conversion intermediate energy level lifetime of erbium ions and relates to the measuring method of fluorescence lifetime, and the measuring method can solve the problems that the existing measuring method of the infrared fluorescence lifetime needs an expensive infrared detector, the testing process is complicated, double beams and the delay change between the double beams need to be introduced, and the testing difficulty is great. The method adopts a delay signal generator, a short pulse laser, a high voltage pulse generator, an enhanced charge-coupled device and a grating spectrometer for constituting a testing system, and fluorescence emitted by a tested material by pulse radiation enters into the spectrometer for testing the light intensity; and the corresponding visible light intensities under different excitation frequencies are measured under the condition of keeping the single pulse energy unchanged, an I-1 / f relation map is drawn out, then fitting is carried out by utilizing the formula, and the fitted tau is the up-conversion intermediate energy level lifetime. The single beam is adopted and the visible light detector is used for measuring the infrared energy level fluorescence lifetime, the measuring process is simple, and the measuring method can be used for measuring the fluorescence lifetime of Er3+ doped materials.
Owner:HARBIN INST OF TECH

Method and device for measuring short pulse ionizing radiation

The present invention discloses a method and a device for measuring short pulse ionizing radiation. The method comprises the following steps: pulsed X-ray is controlled to irradiate a diamond detectorto generate electron hole pairs in order to generate electric current; the electric current is controlled to enter a pre-integrated circuit, and an electrical signal is pre-integrated and measured through a current measuring circuit; the measured electrical signal is collected and converted by a data acquisition circuit, and the ionizing radiation dose of a short pulse radiation field therein isobtained. By using the method, the ionizing radiation of the short pulse radiation field can be measured in real time, thereby operation risk is reduced and health of operators is ensured.
Owner:TSINGHUA UNIV
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