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540 results about "Beam transmission" patented technology

Rotating irradiation apparatus

A rotating irradiation apparatus includes a rotating gantry 3 including a front ring 19 and a rear ring 20 and is provided with a beam delivery device 11 and an irradiation device 4. The beam delivery device 11 delivers an ion beam used for particle radiotherapy. Radial support devices 61A and 61B support the front ring 19 and radial support devices 61A and 61B support the rear ring 20. Each radial support device includes a linear guide 41, an upper support structure disposed above the linear guide 41, and a lower support structure disposed below the linear guide 41. The upper support structure is movably mounted on the lower support structure and is movable in the direction of the rotational axis of the rotating gantry 3.
Owner:HITACHI LTD

Wireless communication system, wireless terminal station, wireless base station, and wireless communication method

A first wireless terminal station transmits beam transmission direction identification information in all directions. A second wireless terminal station receives the transmission direction identification information, combines reception direction identification information and the transmission direction identification information, and transmits directivity direction combination information to a wireless base station. The first and the second wireless terminal stations form directional beams in directions indicated by the directivity direction combination information to thereby perform a direct communication.
Owner:MITSUBISHI ELECTRIC CORP

Systems and methods for automatic target tracking and beam steering

An automatic target tracking system and method employ an image capturing system for acquiring a series of images in real time of a distant area containing a remote target, and a processing system for processing the acquired images to identify the target and follow its position across the series of images. An automatic beam steering and method operate in conjunction with a laser source for emitting a laser beam to be transmitted in the form of a transmitted laser beam extending along a steerable beam transmission axis to the remote target. The beam steering system is controlled by the processing system to steer the beam transmission axis to be aimed at the target being tracked by the target tracking system, so that the transmitted laser beam will be transmitted at the appropriate angle and in the appropriate direction to be aimed at the tracked target.
Owner:INTELLIGENT AUTOMATION LLC

Charged Particle Beam Irradiation System

A charged particle beam irradiation system comprises a high-speed steerer (beam dump device) 100 disposed in a course of a beam transport line 4 through which an ion beam is extracted from a charged-particle beam generator 1. The beam dump device 100 is provided with dose monitoring devices 105, 106 for measuring a dose of an ion beam applied to a beam dump 104 so that the intensity of the ion beam can be measured without transporting the ion beam to irradiation nozzles 15A through 15D. Thus, the system is capable of adjusting the intensity of an ion beam extracted from a synchrotron without operating each component of a beam transport line, and an irradiation nozzle.
Owner:HITACHI LTD

Beam delivery system for laser dark-field illumination in a catadioptric optical system

A method and apparatus for inspecting a specimen are provided. The apparatus comprises a primary illumination source, a catadioptric objective exhibiting central obscuration that directs light energy received from the primary illumination source at a substantially normal angle toward the specimen, and an optical device, such as a prism or reflective surface, positioned within the central obscuration resulting from the catadioptric objective for receiving further illumination from a secondary illumination source and diverting the further illumination to the specimen. The method comprises illuminating a surface of the specimen at a variety of angles using a primary illumination source, illuminating the surface using a secondary illumination source, the illuminating by the secondary illumination source occurring at a substantially normal angle of incidence; and imaging all reflected, scattered, and diffracted light energy received from the surface onto a detector.
Owner:KLA TENCOR TECH CORP

Systems and methods for mitigating interference between access points

Systems and methods which implement cooperative techniques at wireless network access points to provide interference mitigation are shown. Embodiments utilize cooperative antenna beam adaptation techniques wherein antenna beam selection, selective antenna beam transmission power, and / or antenna beam null selection is implemented based upon the communication environment created by a plurality of access points. Additionally or alternatively, embodiments utilize cooperative antenna beam isolation techniques wherein narrow channel filters are implemented with respect to antenna beam signals and / or shielding is provided between various antenna beams based upon the communication environment created by a plurality of access points. Embodiments additionally or alternatively utilize cooperative antenna beam coordination techniques wherein transmission and / or reception of signals is coordinated, the use of antenna beams is coordinated, and / or interference cancellation is implemented based upon the communication environment created by a plurality of access points.
Owner:FIMAX TECH

Laser processing device and method thereof

The invention provides a laser processing device and a method of the laser processing device. The laser processing device comprises a laser, a lens set, a Dove prism, a plane mirror, a focus lens and a workpiece to be processed which are all sequentially arranged in the direction of an optical axis, wherein the lens set is composed of two lenses, and the distance between the two lenses can be adjusted so that the spot sizes and the divergence angles of outgoing beams of the laser can be adjusted; the Dove lens is installed in a rotary motor and rotates with the optical axis as the center, and the beams going out from the Dove lens also rotate with the optical axis as the center; the plane mirror is used for deflecting the transmission direction of the beams; the position of the focus lens in the beam transmission direction can be adjusted, and the beams are focused on the surface of the workpiece to be processed after passing through the focus lens; the workpiece to be processed is placed on an electric displacement platform and can make two-dimensional movement in the plane perpendicular to the transmission direction of the beams.
Owner:北京中科镭特电子有限公司

Synchronization in a beamforming system

A beamforming system synchronization architecture is proposed to allow a receiving device to synchronize to a transmitting device in time, frequency, and spatial domain in the most challenging situation with very high pathloss. A periodically configured time-frequency resource blocks in which the transmitting device uses the same beamforming weights for its control beam transmission to the receiving device. A pilot signal for each of the control beams is transmitted in each of the periodically configured time-frequency resource blocks. The same synchronization signal can be used for all stages of synchronization including initial coarse synchronization, device and beam identification, and channel estimation for data demodulation.
Owner:MEDIATEK INC

Neighbor finding method for directional Ad Hoc network

The invention provides a neighbor finding method for a directional Ad Hoc network. An antenna active detection / passive monitoring mode of a node is determined based on the binary coding bit of the ID of the node, a channel resource is divided into a plurality of sub-channels through the CDMA or the OFDM technology, the number of the sub-channel which is occupied by the node is determined through an equal-probability random selection method, the purpose that multiple nodes send information alternately on different channels is achieved, the data collision conflict caused by the fact that the multiple nodes send information to the same node at the same time in the neighbor finding process is effectively reduced, the success probability of finding a neighbor node can be remarkably improved, and network networking time is shortened. By the adoption of the neighbor finding method for the directional Ad Hoc network, the neighbor node can be rapidly found in the Ad Hoc network with directional beam transmission being adopted completely, and the neighbor finding method for the directional Ad Hoc network is suitable for all networking scenes with network density being large from small. The neighbor finding method for the directional Ad Hoc network is easy to achieve, the time spent in finding all the neighbor nodes within a one-hop range is short, and reliability is high.
Owner:NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP

Method and device for generating perfect Laguerre-Gaussian beam

The invention relates to a method and device for generating a perfect Laguerre-Gaussian beam. After a Gaussian beam is expanded, a spatial light modulator of a computer-generated hologram is loaded and used for regulating a light field, a first-level diffraction beam emitted by the spatial light modulator is captured, and then a hollow Gaussian beam is obtained; phase modulation is conducted through a spiral phase plate, so that a hollow beam carrying orbital angular momentum is obtained; focusing is conduced through a convex lens, so that the perfect Laguerre-Gaussian beam is obtained. According to the method and device for generating the perfect Laguerre-Gaussian beam, the perfect Laguerre-Gaussian beam is generated through the hollow beam carrying the orbital angular momentum, the method is simple and reliable, and the device is simple in structure, easy to adjust and good in stability; the generated beam can be applied to the fields such as the particle capturing field, the free space optical communication and the beam transmission characteristic research field.
Owner:SUZHOU UNIV

Control signaling in a beamforming system

A method of control signaling in a beamforming system is proposed. A user equipment (UE) receives control beam transmission from a base station using a set of control beams in a beamforming network. Each control beam comprises a set of DL control resource blocks, a set of UL control resource blocks, and an associated set of beamforming weights. The UE selects a control beam for establishing a connection with the base station. The UE then performs random access with the base station using the selected control beam.
Owner:MEDIATEK INC

Coherent laser radar system and target measurement method

A coherent laser radar system includes a pulsed laser oscillating a pulsed laser beam which is split into two parts by an optical divider. A first part of the two is transmitted as a transmitted beam via a beam splitter. A second part is supplied to a delay line via a coupling optics and others to be delayed by a predetermined time as a local beam, and is incident onto an optical coupler. The received beam from the target is incident onto the optical coupler via a scanning optics and so on. A photodetector carries out the coherent detection of the light beam coupled by the optical coupler. A signal processor computes a target velocity and the like from a signal generated by the detection and converted into a digital signal by an A / D converter. This makes it possible to solve a problem of a conventional system in that the system configuration is complicated and expensive.
Owner:MITSUBISHI ELECTRIC CORP

Method and system for controlling a network for power beam transmission

A method of providing power beams via a network of source nodes. Source nodes are configured to receive requests for power beam service from airborne user nodes such as aircraft equipped with photovoltaic receivers. User nodes are configured to communicate a set of parameters, such as location, mobility, field of regard, one or more beam wavelengths compatible with the receiver, the beam wavelength further described with a maximum sustained power, duty cycle and pulse repetition rate. Source nodes publish parameters to a network control system. Source nodes publish their location, velocity vector, orientation, available beam capacity, and a schedule of user nodes currently receiving service from the node. Source nodes selectively receive requests from user nodes, and respond to the requests to satisfy the user node parameters. Relays may be used to avoid obstructions, and deconflicting sensors and obstruction sensors may be used detect unauthorized or unusable beam paths.
Owner:THE BOEING CO

Mobile terminal and communication method thereof, base station controller and control method thereof, and multi-cooperative transmission system using the same and method thereof

ActiveUS20130053079A1Fast channel changeRequired levelSite diversityDistributed allocationCommunications systemResource information
A wireless communication system includes a mobile terminal, a controller, and at least one base station. A mobile terminal has an array antenna and searches for neighbor base stations. The controller determines an active set for multi-cooperative transmission / reception with respect to the mobile terminal among searched neighbor base stations, and schedules beam transmission of each base station included in the determined active set. The at least one base station performs transmission / reception with the mobile terminal using beam-forming in an ultra high frequency band, and provides resource information regarding uplink / downlink of each base station included in the active set to the mobile terminal based on the scheduling by the controller.
Owner:SAMSUNG ELECTRONICS CO LTD

Shaped-beam transmission method and shaped-beam transmission device

The invention discloses a shaped-beam transmission method which comprises the following steps: a system sets a subframe structure for performing shaped-beam transmission, wherein, the step further comprises the sub-steps of setting previous n OFDM symbols in the subframe for purpose of transmitting a control signaling and setting the number of OFDM symbols, which are not the previous n OFDM symbols and are used by user exclusive reference signals, and frequency domain spaces of the reference signals on the same data layer, wherein, n is not less than 1 and mapping positions of the reference signals on difference data layers are not overlapped with each other; and when the system judges to perform the shaped-beam transmission, the subframe structure is dispatched to map and transmit the reference signals. The invention also discloses a shaped-beam transmission device which comprises a subframe structure setting module, a shaped-beam judging module and a mapping and transmission executing module. In the invention, the subframe structure is newly set so that the transmission of the user exclusive reference signals can be supported and the shaped-beam transmission can be performed; and meanwhile, resource consumption of the system is reduced and the method and the device are easy to be realized.
Owner:DATANG MOBILE COMM EQUIP CO LTD

Optical phase conjugation 4 pi microscope

A 4-Pi microscope for imaging a sample, comprising a first objective for focusing a first light beam on the sample at a spatial point one or more Digital Optical Phase Conjugation (DOPC) devices, wherein the DOPC devices include a sensor for detecting the first light beam that has been transmitted through the sample and inputted on the sensor; and a spatial light modulator (SLM) for outputting, in response to the first light beam detected by the sensor, a second light beam that is an optical phase conjugate of the first light beam; and a second objective positioned to transmit the first light beam to the sensor and focus the second light beam on the sample at the spatial point, so that the first light beam and the second light beam are counter-propagating and both focused to the spatial point.
Owner:CALIFORNIA INST OF TECH

Optical Connector

The optical fiber connector of the present invention includes a housing having a ferrule receiving passageway and a lens receiving portion which is disposed on the front end portion of this ferrule receiving passageway. A central axis is coaxial with the central axis of the ferrule receiving passageway. A spherical lens is fastened to the lens receiving portion and a ferrule is inserted into the ferrule receiving passageway from the rear side and is incorporated with an optical fiber whose front end surface is perpendicular to the central axis. A transparent block having a refractive index that is substantially the same as the refractive indices of the lens and optical fiber is disposed between the lens and the ferrule so that this block contacts the lens, the ferrule, and the optical fiber. A refractive index matching agent having a refractive index substantially the same as the refractive indices of the lens and optical fiber is applied around the contact point between the lens and the block and around the contact surface between the ferrule and the block. The thickness of the block in the direction of beam transmission is set to be the same as the distance to the focal point from the end surface of the lens.
Owner:TYCO ELECTRONICS JAPAN GK

Light Beam Delivery System With Power, Wavelength And Spot Size Control

A beam delivery system for treating target tissue that includes an input for receiving a light beam, a variable attenuator for providing variable attenuation of the light beam, a power and wavelength detection assembly, a spot size adjustment assembly, and a controller. The power and wavelength detection assembly measures the power level of the beam, and detects when unwanted wavelengths are present in the light beam. The spot size adjustment assembly selectively feeds the beam through different optical fibers to achieve different spot sizes of the beam. The controller controls the variable attenuator, the power and wavelength detection assembly, and the spot size adjustment assembly to achieve the desired power and wavelength, and beam spot size.
Owner:IRIDEX CORP

Method and its device for detecting high energy semiconductor laser divergence angle

InactiveCN101005191AAvoid test errorSolve the problem that the divergence angle of high-energy lasers cannot be testedLaser detailsSemiconductor lasersHigh energyLight spot
Using geometric characteristics of outer margin curves of two light spots at different distances along direction of beam transmission, the disclosed method obtains divergence angle of laser. Through rotational scanning detection, concentric placed two light detectors perpendicular to each other obtain outer margin curves. Multiple optical fibers are distributed on the said light detector evenly. The disclosed device is composed of drive power supply, cooling water platform, cooling water circulation system, 4D traveling platform, electrical motor set, drive, data acquisition module, and PC etc. The light-receiving module includes light detectors. The light-receiving module, data acquisition module, and PC are connected electrically. The invention solves issue of test error caused by regarding face radiation of area array laser as spot light source so as to avoid damaging and burning detector caused by too large power of laser. Advantages are: accurate and reliable.
Owner:DALIAN MARITIME UNIVERSITY

Defect two-dimensional morphology imaging detection method based on multi-mode acoustic beam synthetic aperture focusing

ActiveCN106770669ARealize automatic real-time imagingHigh engineering applicationAnalysing solids using sonic/ultrasonic/infrasonic wavesSonificationElectron
The invention discloses a defect two-dimensional morphology imaging detection method based on multi-mode acoustic beam synthetic aperture focusing, belonging to the technical field of nondestructive testing. According to the method, a phased array ultrasonic detector, a phased array ultrasonic probe and a phased array ultrasonic detection system of an oblique wedge block are adopted; and signal acquisition of a detected test block is performed by the electronic scanning function of the phased array ultrasonic detector to obtain A-scanning signal of each aperture of the phased array ultrasonic probe. According to different mode conversion types of excitation acoustic beam of each aperture on the interface between the wedge block and test block, at the bottom of the test block and on the defect surface, proper multi-mode acoustic beam is selected from 8 acoustic beam transmission modes. Based on SAFT imaging principle and Fermat's theorem, the transmission delay of the multi-mode acoustic beam of each aperture is calculated, and amplitudes are overlapped to obtain a reconstructed SAFT image, thus realizing complete representation of defect two-dimensional morphology features. The invention can realize correct recognition of volume type and area type defects so as to realize accurate quantification of defect length, depth and orientation, and has relatively high engineering application value.
Owner:DALIAN UNIV OF TECH

Optical detection device for detecting an intensity of a light beam and for detecting data transmitted by the light beam

An optical detection device for detecting an intensity of a light beam in a detection window and for detecting data transmitted by the light beam includes a first detection diode and an array of at least two second detection diodes in a detection window. In addition, provision is made for a first readout circuit connectable to the first detection diode, for reading out the first detection diode at a first readout speed to detect the data, and for a second readout circuit connectable to the second detection diodes, for reading out the second detection diodes at a second readout speed smaller than the first readout speed, so as to detect the intensity of the light beam. A fundamental consideration underlying the present invention is that although the provision of additional detection diodes in the detection window initially is associated with additional expense and a reduction of the surface area of the detection window which may effectively be utilized for data detection, these disadvantages are outweighed however, by the fact that this array of additional detection diodes in the detection window enables more effective and / or less expensive control of the alignment of the light beam transmitting the data with the detection window.
Owner:DEUTSCHE THOMSON-BRANDT GMBH +1

Methods and apparatuses for adjusting periodicity for performing beam sweep

In a first configuration, the apparatus may be a base station. The base station adjusts a periodicity for performing a beam sweep, sends information indicating the adjusted periodicity for performing a beam sweep, and performs the beam sweep at the adjusted periodicity. In a second configuration, the apparatus may be a UE. The UE receives information indicating a periodicity for performing a beam sweep from a base station, adjusts the periodicity for performing the beam sweep, and performs the beam sweep at the adjusted periodicity. For both configurations, the beam sweep is a plurality of transmissions of a beam in a plurality of different transmit spatial directions by one of the base station or the UE and a plurality of scans of the beam transmissions in a plurality of different scan spatial directions by another of the one of the base station or the UE.
Owner:QUALCOMM INC

Antennas array calibration arrangement and method

According to one aspect of the invention, an arrangement for controlling transmission and / or reception of signals in a radio communications system is disclosed, comprising transceiving means (TX,RX) each connected to one of an array of antenna elements (#1...#n), wherein at least one of said transceiving means (TX,RX) is additionally connected to a calibration antenna for transmitting and / or receiving test signals to and / or from said antenna elements (#1...#n), at least one calibration processor for determining variations of said test signals in said transceiving means (TX,RX), and a beamforming processor for taking into account the determined variations for beamforming and / or determination of direction of arrival of respectively transmitted or received radio signals by said antenna elements (#1...#n). <IMAGE>
Owner:PROVENANCE ASSET GRP LLC

Method and system for providing wireless base station radio with non-disruptive service power class switching

A system and method of implementing an on-demand change of the RF power class of multi-carrier power amplifiers at a base station radio with minimal disruption of user service is disclosed. The power amplifiers providing signal diversity at said cell site and being able to operate at various RF power class levels. A first multi-carrier power amplifier with multiple RF Power Classes provides a main RF beam transmission at one sector of said cell site. A second multi-carrier power amplifier with multiple RF Power Classes provides RF beam transmission diversity to the main RF beam transmission. A switch operates to disable either the first or second multi-carrier power amplifier when an RF Power class change is required.
Owner:TELEFON AB LM ERICSSON (PUBL)

Light curtain safety system

A system to detect obstacles includes a power beam transmission circuit, a power beam reception circuit arranged to receive a power beam from the power beam transmission circuit, an emitter module, and a detector module arranged to distinguish between a first characteristic and a second characteristic. The emitter module includes a first emitter arranged to emit a first signal having the first characteristic, the first signal emitted in proximity to the power beam, and a second emitter arranged to emit a second signal having the second characteristic, the second characteristic different from the first characteristic, the second signal emitted in proximity to the first signal. The detector module includes a first detector arranged to respond to the first signal emitted by the first emitter, wherein the detector module is arranged to determine when an obstacle is in or near a line-of-sight transmission path between the first emitter and the first detector.
Owner:LASERMOTIVE

Incremental scheduling for wireless communication system with beamforming

An incremental scheduling scheme is proposed in a wireless communication system with beamforming. In an initial stage (stage-1), coarse scheduling plan is granted via control beam transmission. In a second stage (stage-2), fine scheduling plan is granted via dedicated beam transmission. Such incremental scheduling scheme provides load balancing for overhead channels on control / dedicated beams via stage-2 scheduling. It utilizes dedicated beam transmission that is more resource efficient and more UE-specific. Furthermore, it provides UE natural power-saving opportunities via stage-1 scheduling.
Owner:MEDIATEK INC

Scanning microscope with miniature head

The invention provides a scanning microscope comprising: optical fiber for transmitting a light beam to an exit end of the optical fiber proximate light focusing optics, the light focusing optics focusing the light emerging from the exit end to illuminate a point observation field on or within an object to be examined; and a scanner mounted in an optical head casing with the light focusing optics, to cause the illuminated point observation filed to scan over a two-dimensional cross-section of the object such that an image of the object emanated light over the cross-section is constructible. The scanner comprises a forwardly extending vibratable member and a counterbalance coupled thereto, the point observational field is forward the vibratable member, the vibratable member is coupled to the exit end of the optical fiber to provide the fast scan, the counterbalances reactive forces associated with vibration of the vibratable member and the exit end of the optical fiber during operation, and the light focusing optics is mounted in the optical head casing separately from the vibratable member whereby the light emanating from the exit end of the optical fiber is, during operation, scanned across the light focusing optics.
Owner:OPTISCAN

Beam shaping illumination system of semiconductor laser array

The invention discloses a beam shaping illumination system of a semiconductor laser array, which comprises the semiconductor laser array, an optical system for transforming beam divergence angles of a fast axis, a device for deflecting angles of beams in the fast axis direction, and an optical system for transforming divergence angles of a slow axis and deflecting the beams in the slow axis direction. The system has a key point that the superposition effect of Gaussian beam parts of a plurality of laser units is formed in a distant field by controlling the deflection degree of beam transmission axes of each laser unit in the fast axis and slow axis directions respectively so as to construct illumination beams according with field coverage requirements. The system has the characteristics of high efficiency, simple structure, low cost, integration and practicability, and is particularly applicable as an illumination light source of area array imaging laser radar and active laser illumination detecting systems.
Owner:ZHEJIANG UNIV
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