2118 results about "Beam scanning" patented technology

An array antenna is formed of a plurality of antenna elements, each of which scans a beam in the direction of an angle theta to a boresight of the antenna and electrically varies the direction of a rotation angle phi of the beam. The antenna elements are disposed so that the optical path difference of radio waves transmitted or received by two adjacent antenna elements in the directions of a plurality of direction angles phi on the plane tilted for an angle theta to the boresight of the antenna is nearly a multiple of the wave length of the radio waves.

Arrangements, apparatus, systems and systems are provided for obtaining data for at least one portion within at least one luminal or hollow sample. The arrangement, system or apparatus can be (insertable via at least one of a mouth or a nose of a patient. For example, a first optical arrangement can be configured to transceive at least one electromagnetic (e.g., visible) radiation to and from the portion. A second arrangement may be provided at least partially enclosing the first arrangement. Further, a third arrangement can be configured to be actuated so as to position the first arrangement at a predetermined location within the luminal or hollow sample. The first arrangement may be configured to compensate for at least one aberration (e.g., astigmatism) caused by the second arrangement and / or the third arrangement. The second arrangement can include at least one portion which enables a guiding arrangement to be inserted there through. Another arrangement can be provided which is configured to measure a pressure within the at least one portion. The data may include a position and / or an orientation of the first arrangement with respect to the luminal or hollow sample.

A surface inspection system, as well as related components and methods, are provided. The surface inspection system includes a beam source subsystem, a beam scanning subsystem, a workpiece movement subsystem, an optical collection and detection subsystem, and a processing subsystem. The signal processing subsystem comprises a series of data acquisition nodes, each dedicated to a collection detection module and a plurality of data reduction nodes, made available on a peer to peer basis to each data acquisition nodes. Improved methods for detecting signal in the presence of noise are also provided.

An apparatus and a method for a handover in a communication system using beamforming are provided. The method includes the operations of receiving handover information from a serving base station, measuring, on the basis of beam scanning, a first reference signal transmitted from the serving base station and a second reference signal transmitted from a target base station, if the result of the measurement satisfies handover conditions, transmitting the result of the measurement to the serving base station, and receiving, on the basis of the handover information, a handover permission message from the target base station.

An optical scanner includes a light source; a deflecting unit that deflects and scans a light beam emitted from the light source; a scanning optical system that focuses the light beam deflected and scanned onto different surfaces to be scanned; and a light quantity correcting unit that corrects a light quantity of the light beam. The light quantity correcting unit changes light quantity correction data used for correcting the light quantity of the light beam for each of the surfaces. The light quantity correction data is dependent on positions in a main scanning direction.

The invention relates to a method for processing synchronous signal blocks, a base station and user equipment. The synchronous signal blocks include first synchronous signal subblocks and second synchronous signal subblocks. In each synchronizing cycle, the method comprises the following steps: sending the first synchronous signal subblocks corresponding to all wave beams in the synchronizing cycle according to a preset first wave beam scanning sequence; and sending the second synchronous signal subblocks corresponding to all wave beams in the synchronizing cycle according to a preset second wave beam scanning sequence, wherein the first wave beam scanning sequence and the second wave beam scanning sequence are different, and therefore, relative offsets of the time domain between each first synchronous signal subblock and the corresponding second synchronous signal subblock are different. By utilizing the scheme, the processing complexity of the synchronous signal blocks can be reduced.

An apparatus and a method for beam selection and inter-beam scheduling using beam scanning in a beamformed wireless communication system are provided. A method for transmitting a signal in a transmitting stage includes transmitting a reference signal through at least one transmission beam, receiving channel information of at least one transmission beam from a receiving stage, selecting a first transmission beam for sending a signal to the receiving stage, by considering the channel information of the at least one transmission beam provided from the receiving stage, and performing inter-beam scheduling for the receiving stage by considering ID information of the first transmission beam.

Methods and systems for performing three dimensional LIDAR measurements with multiple illumination beams scanned over a three dimensional environment are described herein. In one aspect, illumination light from each LIDAR measurement channel is emitted to the surrounding environment in a different direction by a beam scanning device. The beam scanning device also directs each amount of return measurement light onto a corresponding photodetector. In some embodiments, a beam scanning device includes a scanning mirror rotated in an oscillatory manner about an axis of rotation by an actuator in accordance with command signals generated by a master controller. In some embodiments, the light source and photodetector associated with each LIDAR measurement channel are moved in two dimensions relative to beam shaping optics employed to collimate light emitted from the light source. The relative motion causes the illumination beams to sweep over a range of the three dimensional environment under measurement.

A high speed non-contact beam scanning device sized and shaped to provide the ergonomic benefits of a pen or wand, yet can scan a wide angle moving beam across an information-bearing target in one or two dimensional scan patterns such as lines, rasters or other patterns in order to read information therefrom. The device is well suited for reading one or two dimensional bar-code or other printed matter. In order to achieve the high density optical packaging necessary for its high performance to size benefits the device employs a novel in-line or "axial" gyrating, or "axial" scan element. The axial scan element can accept an input light beam at one end and cause it to emerge from its opposite end as a scanned beam, propagating in the same general forward direction it had upon entering the element. Reflected light, which carries information contained on the target, is collected by an internal non-imaging light collector and is processed by signal processing electronics. All components are integrated into a thin low mass module small enough to fit in a pen. Communication from the device is achievable by a cable or by wireless means.

In a method for scribing fragile material, a laser beam is irradiated onto a work plate of the fragile material. The work plate is heated by absorption of the irradiated laser beam and generating thermal stress by the heating. The laser beam is formed by a plurality of laser beam groups arranged along a beam scanning direction on a same line, and the plurality of laser beam groups are divided into two groups. One takes charge of initial heating and rising up temperature of the work plate, and another takes charge of temperature holding of the work plate. The laser beam intensity corresponding to each of the laser beam groups is adjusted so as to obtain optimum values.By the method, it is possible to remarkably increase scribing speed of the work plate of the fragile materials without increasing heating temperature.

A system designs a thin and relatively flat microwave focusing lens that can produce multiple simultaneous beams, using readily-available isotropic dielectric materials, and having a gradient-index (GRIN) profile. The design optimizes the lens to achieve beam scanning and / or multiple beams over a wide field of regard (FOR) with broad bandwidth and a very short focal length compared with conventional lenses. The lens can be used individually or as an element in a more complex antenna having multiple lenses in various orientations that are independently switched, selected and / or excited simultaneously as elements in a phased array. The antenna terminal incorporates such lens into an array of lenses along with one or more feeds to produce single or multiple beams covering a broad field of regard for such applications as satellite communications on-the-move, cellular, broadband point-point or point-multipoint and other terrestrial or satellite communications systems. The lens and array design support multiple simultaneous independently steerable beams as well as null placement for interference cancellation.

Provided is a 3-dimensional (3D) display apparatus including a light source, a beam scanner, and a beam deflector array. The beam scanner scans light emitted by the light source, and the beam deflector array includes a plurality of beam deflectors arranged in an array to reproduce a light field by changing a direction of light rays scanned by the beam scanner.

Disclosed are techniques for efficiently inspecting defects on voltage contrast test. In one embodiment, methodologies and test structures allow inspection to occur entirely within a charged particle system. In a specific embodiment, a method of localizing and imaging defects in a semiconductor test structure suitable for voltage contrast inspection is disclosed. A charged particle beam based tool is used to determine whether there are any defects present within a voltage contrast test structure. The same charged particle beam based tool is then used to locate defects determined to be present within the voltage contrast test structure. Far each localized defect, the same charged particle beam based tool may then be used to generate a high resolution image of the localized defect whereby the high resolution image can later be used to classify the each defect. In one embodiment, the defect's presence and location are determined without rotating the test structure relative to the charged particle beam.

A maskless plasma-formed ion beam lithography tool provides for patterning of sub-50 nm features on large area flat or curved substrate surfaces. The system is very compact and does not require an accelerator column and electrostatic beam scanning components. The patterns are formed by switching beamlets on or off from a two electrode blanking system with the substrate being scanned mechanically in one dimension. This arrangement can provide a maskless nano-beam lithography tool for economic and high throughput processing.

A progressive scan architecture for displaying a two-dimensional image by alternately scanning two or more laser beams, one after the other with a time delay between adjacent beams. The beams are arranged to become incident upon a polygon scanner in a row with an approximately uniform spatial separation and an approximately equal angle between adjacent beams. The polygon scanner scans horizontally and a galvanometer-driven mirror scans vertically. Adjacent lines are progressively scanned in sequence from top to bottom, which advantageously reduces or eliminates psycho-visual effects and is tolerant of non-linearities in the vertical scanner, allowing use of a low-cost galvo mirror. Typically, the beams in the row are arranged in pairs, and only one beam from each pair will be scanning at any one time. Embodiments are described in which the duty cycle is slightly less than 50% and the laser illumination is switched between two interleaved beam scans thereby allowing a single modulator to be used for both beams which provides significant cost advantages and improves system efficiency. For full-color images, each of the beams described can incorporate separate red, green and blue (RGB) components which are individually modulated by separate red, green, and blue modulators. The system can be scaled up with one or more additional pairs of beams to improve resolution and / or increase pixel count without requiring a high-speed polygon scanner or a highly-linear galvo scanner. Furthermore, the height of each facet in the polygon mirror need be only one beam diameter and its length need only be two beam diameters, which allows the system to approach the minimum pixel size attainable, which is useful to provide high efficiency and high brightness in the image.

The invention provides a method and equipment using organic adhesive mixed solvent and powder to manufacture three-dimensional workpieces. The work principle is as follows: the raw materials are stirred into slurry, which is laid as a green compact thin layer that can disintegrate in disintegrant; the green compact thin layer can form a workpiece thin layer that does not disintegrate in the disintegrant after scanned by an energy beam; in such a cycle, the steps of laying the thin layer and energy beam scanning are repeated, and then the three-dimensional workpiece can be formed; and the disintegant is used for separating the green compact not scanned by the energy beam from the workpiece, thus remaining the needed three-dimensional workpiece. The invention is widely applicable to manufacturing plastic, metallic, ceramic and compound workpieces, can avoid the defects of a selective laser sintering method, can use fine and very thin powder and therefore, can manufacture a finished product which is better than that made in the traditional selective laser sintering method in surface roughness and texture fineness, in addition, through subsequent densified sintering, the metallic and ceramic workpieces can have the strength superior to that in the traditional selective laser sintering method.

A surgical microscopy system is provided wherein an optical coherence tomography facility is integrated into a microscopy system. A beam of measuring light formed by collimating optics of an OCT system is deflected by a beam scanner, traverses imaging optics, and is reflected by a reflector such that the beam of measuring light traverses an objective lens of microscopy optics and is directed to an object region of the microscopy optics. A position of the beam of measuring light being incident on the reflector is substantially independent on a direction into which the beam of measuring light is deflected by the beam scanner. When traveling through the beam scanner, the beam of measuring light is comprised of a bundle of substantially parallel light rays.

An optical fiber having a reduced cross-sectional region adjacent to its distal end, which is fused to an optical component, is vibrated, rotating the optical component to scan a region. The optical component has a back focal point that is substantially coincident with an effective light source of the optical fiber, so that the light emanating from the optical component is either substantially collimated or convergent. The optical component is either a ball lens, a drum lens, a graded index lens, or a diffractive optical element. A vibratory node is also made substantially coincident with the back focal point of the optical component, producing a compact scanner with extensive field of view. The optical fiber is preferably reduced in cross-sectional area after the optical component is fused to the optical fiber, by immersion in a three-layer etch apparatus having an etch-stop layer, an etch layer, and a solvent layer.

The invention provides an integrated millimeter wave active phased-array antenna. The integrated millimeter wave active phased-array antenna is reliable in performance, ensures that the number of chips can be reduced, and reduces cost. According to the technical scheme, an antenna bearing layer is integrally connected to a feed network through an antenna array surface and a TR assembly; micro-strip patches of the antenna array surface are arranged below the antenna bearing layer according to a rectangular grid array and are connected with power amplifier chips of the TR assembly according to a 8*8 array scale, and every four power amplifier chips are connected with a four-channel integrated phase shifter to constitute a 2*2 sub-array circuit to be integrally connected with the feed network downwards; a radio frequency signal is input to a power dividing network through the feed network and is disseminated into four paths of radio frequency signals through a plurality of four-channel integrated phase shifters, and the radio frequency signals are input into corresponding power amplifier chips, are transmitted to the micro-strip patches and are transmitted; sixteen four-channel integrated phase shifters and sixty-four power amplifier chips are controlled by control signals through a low-frequency signal network to finish radio frequency signal space power synthesis and beam scanning.

A laser beam is reflected by a light beam scanning device and irradiated onto a hologram recording medium. On the hologram recording medium, an image of a linear scatter body is recorded as a hologram by using reference light that converges on a scanning origin. The light beam scanning device bends the laser beam at the scanning origin and irradiates the laser beam onto the hologram recording medium. At this time, by changing a bending mode of the laser beam with time, an irradiation position of the bent laser beam on the hologram recording medium is changed with time. Diffracted light from the hologram recording medium produces a reproduction image of the linear scatter body on a light receiving surface of the stage. When an object is placed on the light receiving surface, a line pattern is projected by hologram reproduction light, so that the projected image is captured and a three-dimensional shape of the object is measured.

The invention provides a system for a pilotless plane to automatically avoid a barrier and an avoiding method of the system. The system comprises a laser distance measuring device, a plane-mounted signal control system, a plane-mounted air route database, a plane-mounted communication system and a navigational flight control system. The system particularly has good avoiding function to small barriers such as a high-voltage cable and the like due to the designed laser fan-beam scanning device and simultaneously can emit a plurality of light beams to the barrier within a short time, thereby solving the problem that the measured data are inaccurate as single-beam laser is easily blocked by particulate matters such as mist, foam, dust and envapour in the air in the past and improving the anti-interference capacity of the laser distance measurement and making the pilotless plane with the automatic avoiding device to efficiently, and therefore, the pilotless plane provided with an automatic avoiding device can complete the flight mission in a relatively complicated geographical environment safely and quickly.

Systems and methods which utilize antenna pattern or antenna beam scanning techniques to provide communication of payload traffic are shown. A base station radio is provided wireless communication links with a plurality of stations for communication of payload traffic between the base station and stations using a succession of antenna patterns. The antenna patterns are scanned in succession, such as randomly, quasi-randomly, sequentially, or according to a schedule. An antenna pattern scheduler may be used to implement antenna pattern scanning and traffic timing. Cooperative scheduling with respect to a plurality of base stations may be provided. Selection of the plurality of antenna patterns used by a base station is preferably adjusted from time to time, such as based upon environment, usage patterns, etcetera.

An enhanced resolution scanned image of an object is produced by a scanning laser microscope which includes an illumination arm for scanning an object with a focused probe beam and a detection arm for receiving light from the object. The detection arm includes a detector which collects and detects light from the object to produce pixel data for a plurality of pixels. In addition, the detection arm includes a wavefront sensor for sensing phase variations of the light from the object to produce wavefront data for scanned pixel locations. From the wavefront shape of the collected light at each pixel location, a high frequency spectrum is determined which corresponds to uncollected scattered light from small scale features of that pixel location. An enhanced resolution image of a region of interest is produced based on the high frequency spectra of the scanned pixel locations.

A radar apparatus of an automotive vehicle includes a radar unit which radiates an electromagnetic wave to a target in a forward direction of the vehicle and receives reflection beams from the target to detect the target. A scanning control unit performs a beam scanning of the radar unit to the target so that the reflection beams during the beam scanning are received. A center direction determining unit detects a distribution pattern of the received reflection beams with respect to respective scanning angles of the radar unit, performs a similarity approximation of the distribution pattern by using an antenna directional gain pattern of the radar unit to produce an approximated distribution pattern, and determines a direction of a center of the target based on a peak of the approximated distribution pattern.