68 results about "Scanning beam" patented technology

A chip package includes a housing, one or more electrical connections coupled to an exterior of the housing, a photonic integrated circuit, and a scanning unit. Both the photonic integrated circuit and the scanning unit are disposed within the housing. The photonic integrated circuit has at least one waveguide designed to guide a beam of light. The scanning unit is designed to laterally scan the beam of light across a focal plane outside of the housing. The scanning unit is aligned with the photonic integrated circuit such that the beam of light is coupled between the photonic integrated circuit and the scanning unit.

The invention provides a communication method, device and system, a computer program product and a readable storage medium, and the method can be applied to a communication scene exemplarily. In the method, the terminal device can perform blocking sensing based on the variation of the pose data and the variation of the signal quality data, and reports the sensed whether the terminal device is blocked or not and the blocking sensing type under the blocked condition to the network device. Thus, the network device can perform beam adjustment according to the blocking sensing type reported by the terminal device, such as frequency band or bandwidth adjustment, or determine a small number of candidate scanning beams corresponding to the blocking sensing type to perform selection and switching of available beams. According to the method, the network equipment can quickly determine a small number of accurate candidate scanning beams according to the blocking sensing type, the overhead of full beam scanning is reduced, and beam recovery is quickly realized.

The embodiment of the invention provides a laser scanning method and device, laser communication equipment and a laser communication system. The laser scanning method comprises the steps that a pointing center point where a target object is located is determined according to ephemeris information of the target object; the rotation angles of a plurality of array elements in the transceiving array are controlled, so that light beams emitted by the array elements are subjected to incoherent superposition to form scanning light spots, and the light beams emitted by the array elements are obtained through deflection of incident light of the transceiving array; scanning in a preset range pointing to the center point by adopting the scanning light spot, and controlling the rotation angles of a plurality of array elements in the transceiving array to enable light beams emitted by the plurality of array elements to be coherently superposed to form a scanning light beam under the condition that the first position of the target object is scanned; and scanning the first position with the scanning beam to capture the target object. The non-coherently stacked scanning light spots are firstly used for coarse positioning, and then the coherently stacked scanning light beams are used for fine positioning, so that efficient, rapid and accurate capturing of the rapidly moving target is realized.

The invention provides a near-field feed low-complexity reconfigurable antenna system, which belongs to the technical field of millimeter wave communication antennas and comprises a 1-bit phased array, a waveguide feed horn array and an air gap between the 1-bit phased array and the waveguide feed horn array. The 1-bit unit is composed of two magnetoelectric dipoles, and two diodes are integrated in the receiving unit to achieve 1-bit phase control. According to the 1-bit reconfigurable magnetoelectric dipole phased array disclosed by the invention, one horn mouth surface is used as a near-field feed source of the 2 * 2 magnetoelectric dipole sub-array, so that not only is the uniformity of aperture irradiation ensured through near-field coupling, but also the number of required phase shifters is reduced, and the excitation of the 1-bit reconfigurable magnetoelectric dipole phased array is conveniently realized. The waveguide phase shifter is directly integrated in the horn array antenna, by means of the working phase range wide enough, the phase shifter can effectively achieve phase distribution needed by array near-field feed, and mirror lobes in scanning beams are successfully suppressed. The reconfigurable array antenna is high in aperture efficiency, low in profile and simple in structure, and has the broadband scanning capability.

The invention relates to a miniature stress detector, which comprises a light emitting assembly, a detection head and a light receiving assembly, and is characterized in that the light emitting assembly is used for providing a scanning light beam for the detection head; the detection head is used for scanning the surface of the to-be-detected target after receiving the scanning light beam and generating a polar Kerr effect on the surface of the to-be-detected target; and the optical receiving assembly is used for receiving an optical signal fed back by the detection head under the polar Kerr effect and converting the optical signal into stress in the target to be detected. A stress detection method is provided. According to the invention, a light system is constructed by combining the light emitting assembly and the light receiving assembly, so that the detection head can detect the stress in a to-be-detected target by using the polar Kerr effect, the explosion risk is eliminated by using a non-electromagnetic sensing technology, the lift-off effect is overcome by using optical locality measurement, the size of the probe is reduced, and the detection precision is improved. An intrinsically safe and high-precision technical means is provided for rapid stress state scanning in a high-risk environment, and the safety of high-value targets in key industrial fields such as electric power, petrochemical engineering and aerospace is guaranteed.

This invention provides an ophthalmic optical device that eliminates the need to place a separate lens attachment between the objective lens and the eye under examination by changing the working distance between the objective lens and the eye under examination when observing the posterior segment and when observing the anterior segment. [Solution] In the ophthalmic optical device, when photographing the posterior segment of the eye under examination, a position conjugate to the vertical scanning unit is formed in the anterior segment of the eye under examination, and the scanning beam from the vertical scanning unit is focused on the posterior segment of the eye under examination. When photographing the anterior segment of the eye under examination, the working distance, which is the distance between the eye under examination and the objective lens, is greater than the working distance when photographing the posterior segment, and the scanning beam from the vertical scanning unit is focused on the anterior segment of the eye under examination. The scanning direction of the scanning beam by the vertical scanning unit is the same when photographing the posterior segment and when photographing the anterior segment.

To provide an antenna device that allows for easy selection of the optimal interface layer. [Solution] The interface layer selection method includes an antenna provided on a windowpane and capable of scanning beam angles, an interface layer provided on the windowpane, and a control unit, and is a method for selecting the interface layer of a wireless communication device provided on a window having the windowpane, wherein the control unit scans the beam angle of the antenna to obtain a first angular distribution of the received power of radio waves arriving from a base station with respect to the beam angle, estimates the incident angle of the radio waves based on the first angular distribution, and selects an interface layer according to the estimated result of the incident angle.

The application discloses a target radar cross section estimation method and system, and relates to the technical field of radio and radar detection; the method comprises the following steps: forming a main scanning beam, a left accompanying beam and a right accompanying beam in a residence period, collecting echo samples to obtain an echo sample set, recording a beam serial number and a pointing angle to obtain a multi-beam pointing table, and obtaining a multi-beam power group from the echo intensity of three beams; obtaining a direction map deviation segment from the multi-beam power group and the multi-beam pointing table; aligning the direction map deviation segment with the echo sample set, and obtaining a channel consistency correction table according to a background echo segment; obtaining a de-drift echo power sequence and a maneuvering decoupling weight according to the channel consistency correction table and a tracking error sequence; the application can effectively solve the problems of the mixing of sidelobe energy caused by the beam pointing error in the prior art and the asymmetric drift of the radar cross section estimation caused by the change of the beam shape with the pointing.

A laser scanning system includes an emitting device, a transmitting device, a first rotating mirror device, an optical path shaping device, a second rotating mirror device, and a receiving device. The optical path shaping device can directly reflect a first beam propagating on the same horizontal plane into multiple third beam surfaces propagating in different horizontal planes. The key to this application is that, through the combined action of the first rotating mirror device and the optical path shaping device, the single probe beam emitted by the emitting device is converted into multiple third scanning beams propagating in different horizontal planes, completely replacing the function of the galvanometer device in the prior art. Therefore, the laser scanning system can achieve surface scanning without a galvanometer motor, eliminating the limitations imposed by the galvanometer motor on the stability and lifespan of the entire laser scanning system. This significantly improves the stability and lifespan of the laser scanning system of this invention. It also reduces the regularity of the galvanometer's accelerated oscillation damage, resulting in a more uniform point cloud map.

The present disclosure relates to the technical field of meteorological detection, and particularly relates to a method and device for monitoring deviation of scanning beam of phased array weather radar. The method comprises: receiving radar scanning data and identifying whether it is valid precipitation echo; if yes, adjusting the azimuth angle of the radar to a first position according to the radar scanning data; at the first position, adjusting the elevation angle of the antenna to at least two preset angles, and adjusting the deflection angle of the antenna at each preset angle, so that the area scanned by the deflection angle of the antenna at one preset angle and the area scanned by the normal direction of the antenna at another preset angle overlap; receiving observation data after adjusting the elevation angle of the antenna and the deflection angle of the antenna; and determining whether to calibrate the radar according to the observation data and a preset threshold. The above technical solution solves the problem that there is no effective method to determine when to calibrate the phased array weather radar in the prior art.

A system and method for applying a laser pattern using machine vision positioning and alignment of a wafer is provided. A laser annealing machine configured to apply laser annealing to a workpiece may be configured to provide visual positioning and alignment of the workpiece for applying laser annealing. Providing visual positioning and alignment of a workpiece includes acquiring visual data representing the workpiece via at least one visual sensing device, identifying one or more features in the workpiece or identifying one or more regions in the workpiece based on the acquired visual data to ensure that the workpiece is centered and aligned when a scanning beam is applied to the workpiece. The identifying includes adjusting an operation of the at least one processing component.

The application discloses a kind of electric control fixed frequency beamforming scanning leaky-wave antenna hybrid encoding method, applied to electronic and communication technology field, wherein including: S1, in the case of beamforming scanning, first to determine the relationship and size between beam angle and field intensity along straight path, then according to the secant relationship criterion, the electric field intensity of different positions or angles can be obtained;S2, according to the electric field intensity distribution, the diode encoding state of beam in a certain direction is determined by using hybrid encoding method, so as to design the beamforming scanning beam along the line to meet the requirements of shaping, and the shaping scanning is realized.The present application is the shaping scanning technology proposed for the demand of smooth coverage of electric wave in limited space, can make the radiation field intensity meet the secant square relationship at each position when antenna beam scanning, so as to make the electric field on the horizontal line basically constant.

Aspects of the present disclosure describe systems and methods for eye-tracking by steering a scan beam in a two-dimensional pattern over a scan region on the eye and detecting light reflected from a plurality of reflection points in the scan region at an angle-sensitive detector. The three-dimensional location of each reflection point is determined by triangulating the instantaneous propagation directions of the scan beam and the reflected signal from that reflection point. Gaze direction for the eye is determined from the locations of the reflection points in three-dimensional space.

The application discloses a kind of based on local fine scanning and power complement millimeter wave array two-dimensional DOA estimation method and system, method includes: using first beam set to carry out coarse scanning to full angle domain, determine the region of interest where target is located;In azimuth dimension, only local high-resolution fine scanning is carried out to the region of interest, keep full angle domain scanning in elevation dimension, obtain local fine scanning power observation;Power complement is carried out to azimuth angle region that is not scanned, and complete power observation vector is constructed;Least square method is used to reconstruct array element domain covariance matrix;Eigenvalue decomposition is carried out to reconstructed covariance matrix, extract noise subspace, and the two-dimensional arrival angle of signal source is estimated.The application is under single radio frequency chain analog beamforming architecture, through azimuth local scanning and power complement, scanning beam quantity is greatly reduced, while maintaining close to global fine scanning super-resolution DOA estimation precision, applicable to mobile scene low overhead, high-precision direction of arrival estimation.

Embodiments of the present application provide a laser scanning method and device, laser communication equipment and laser communication system, comprising: determining a pointing center point where a target object is located according to ephemeris information of the target object; controlling rotation angles of a plurality of array elements in a transceiving array to make light beams emitted by the plurality of array elements incoherently superimposed to form a scanning spot, wherein the light beams emitted by the plurality of array elements are obtained by deflection of incident light of the transceiving array; and using the scanning spot to scan within a preset range around the pointing center point, and in a case where a first position of the target object is scanned, controlling the rotation angles of the plurality of array elements in the transceiving array to make the light beams emitted by the plurality of array elements coherently superimposed to form a scanning beam; and using the scanning beam to scan the first position to capture the target object. Through first coarse positioning using the incoherently superimposed scanning spot and then fine positioning using the coherently superimposed scanning beam, efficient, fast and accurate capture of a fast-moving target is achieved.

The invention provides a target detection method, device and equipment and a readable storage medium. The method is applied to a sensing sending node, and comprises the following steps: obtaining at least one piece of scanning beam list information, the beam scanning beam list information being used for indicating a plurality of scanning beam resources and / or a scanning time sequence of the plurality of scanning beam resources, and the plurality of scanning beam resources being used for determining position information of a target object; and sending the scanning beam according to the scanning beam list information. Through the scheme, the duration of the beam scanning period can be reduced.

The application discloses a design method of a two-unit leaky-wave antenna array structure based on a half-mode dielectric ridge parallel plate waveguide, and the method comprises the following steps: according to basic mode analysis, a half-mode dielectric ridge parallel plate waveguide is constructed on the basis of a dielectric ridge parallel plate waveguide; based on the transmission characteristics of the half-mode dielectric ridge parallel plate waveguide and the leaky-wave antenna theory, a half-mode dielectric ridge parallel plate waveguide leaky-wave antenna is designed to realize a small-size broadband high-efficiency leaky-wave antenna; based on the half-mode dielectric ridge parallel plate leaky-wave antenna and the array antenna theory, a two-unit half-mode dielectric ridge parallel plate waveguide leaky-wave antenna array structure is designed, and the structure two-port array antenna is fed by a probe in parallel to realize a narrow lobe and a high-gain scanning beam. The application can obtain a narrow beam and a high-gain scanning beam while keeping the advantages of wideband, high efficiency, small size, compact structure, low profile, easy processing and low cost, and further compresses the size of a microwave millimeter wave integrated circuit.

A method of measuring and optimizing dose rate variation in an ion implantation system, the method including generating a scanned beam according to a beam recipe provided to the ion implantation system, moving a profiler head across the scanned beam, the profiler head including a current sensing array including at least one current sensing device adapted to measure a dose rate of the scanned beam for generating a scanned beam profile of the scanned beam, identifying peak current values across the scanned beam profile and deriving a first dose rate profile therefrom, comparing at least one metric associated with the first dose rate profile to at least one corresponding dose rate variation target to determine whether the first dose rate profile is sufficiently uniform, and if the first dose rate profile is not sufficiently uniform, adjusting settings of the beam shaping components so that the scanned beam has a second dose rate profile that is more uniform than the first dose rate profile.

The invention discloses a method for forming a nickel-based superalloy through electron beam additive manufacturing, belongs to the technical field of electron beam additive manufacturing, and aims to solve the problem that cracks are easy to occur during existing electron beam additive manufacturing of the nickel-based superalloy. The method comprises the following steps: designing a three-dimensional model of a part by utilizing software; the part three-dimensional model is imported into a software platform to repair the model, the repaired model is placed on a printing platform, after model repairing and placing are completed, the model is exported as an STL format file, and the STL format file is imported into printing equipment; preheating the substrate; forming a core area and a contour area of the part by electron beams respectively, printing to obtain an initial part, and then performing hot isostatic pressing treatment to obtain a final part; in the step 4, the scanning beam of the outline area of the electron beam forming part is smaller than that of the core area of the electron beam forming part, and the scanning rate of the outline area of the electron beam forming part is larger than that of the core area of the electron beam forming part. The formed nickel-based superalloy is free of cracks.

A method of measuring and optimizing dose rate variation in an ion implantation system, the method including generating a scanned beam according to a beam recipe provided to the ion implantation system, moving a profiler head across the scanned beam, the profiler head including a current sensing array including at least one current sensing device adapted to measure a dose rate of the scanned beam for generating a scanned beam profile of the scanned beam, identifying peak current values across the scanned beam profile and deriving a first dose rate profile therefrom, comparing at least one metric associated with the first dose rate profile to at least one corresponding dose rate variation target to determine whether the first dose rate profile is sufficiently uniform, and if the first dose rate profile is not sufficiently uniform, adjusting settings of the beam shaping components so that the scanned beam has a second dose rate profile that is more uniform than the first dose rate profile.

This embodiment provides a defect detection method, system, and storage medium for dispensing processes. The system includes a main camera, a slave camera, and an optical device. The main camera and slave camera are used to capture images of the target micelles from different shooting angles. The method includes: during the initial defect detection, emitting a scanning beam towards the target dispensing via the optical device, the intensity of the scanning beam being less than the intensity of the detection beam used for formal defect detection; acquiring scanning images of the target dispensing under the illumination of the scanning beam using both the main camera and the slave camera; determining the illumination parameters of the detection beam during defect detection based on the scanning images; emitting a detection beam towards the target dispensing via the optical device based on the illumination parameters; acquiring detection images of the target dispensing under the illumination of the detection beam using both the main camera and the slave camera; and determining the dispensing quality of the target dispensing based on the detection images. This embodiment achieves efficient and accurate detection of dispensing defects.

The invention discloses a pipeline detection device and method based on laser scanning. The device comprises a sealed cabin, an optical scanning unit arranged on the sealed cabin and a centering mechanism arranged on the outer side of the sealed cabin. The sealed cabin body at least comprises a cylindrical main body made of a transparent material; the optical scanning unit sequentially comprises a laser transmitter, a rotary scanning mirror group, a wide-angle light collector and an image sensor along a light path; the laser transmitter is used for generating a collimated laser beam; the rotary scanning mirror group is used for deflecting the collimated laser beam into a scanning light beam rotating around an axis so as to form an annular scanning light spot on the inner wall of the pipeline; the wide-angle light collector is used for receiving scattered light of the annular scanning light spots on the inner wall of the pipeline; the image sensor is used for collecting a scattered light image guided by the wide-angle light collector; the centering mechanism comprises a plurality of flexible centering arms which are elastically supported in the radial direction. The method can adapt to complex working conditions, can realize full-circumferential three-dimensional shape measurement, and is high in detection precision and high in efficiency.

This invention relates to the technical field of flatness inspection, and in particular to a flatness inspection device for integrated circuit substrate processing. The device includes an inspection table, a scanning beam, an inspection laser head, a guide base, and a reciprocating lead screw. A ball bearing seat is threaded onto the external thread of the reciprocating lead screw. A tooling support assembly is provided on the outside of the ball bearing seat. The tooling support assembly includes a support rotating seat, a clamping seat, and horizontal stop plates. A half-turn rotating assembly is provided on each side of the two horizontal stop plates that are far apart. This invention achieves flatness inspection of both sides of the integrated circuit substrate in a single clamping operation through the linkage of a flip trigger stop, a flip drive lead screw, and a flip drive nut seat. This completely eliminates the manual flipping operation, significantly improving overall inspection efficiency and effectively avoiding problems such as substrate scratches and positioning misalignment that may occur during manual flipping, ensuring the consistency and accuracy of the double-sided inspection results.

Systems and methods are provided for utilizing machine vision positioning and alignment of wafers for application of lasing patterns. A laser annealing machine that is configured to apply laser annealing to workpieces, may be configured to provide visual positioning and alignment of workpieces for the application of laser annealing. Providing visual positioning and alignment of workpieces includes obtaining, via at least one visual sensing device, visual data representative of a workpiece, identifying, based on the obtained visual data, one or more features or regions in the workpiece, to ensure that the workpiece is centered and aligned when applying the scanning beam to the workpiece. The identifying includes adjusting operation of at least one processing component.

A wireless power transmitter for powering a remote receiver using a laser beam, the laser beam generator having current inputs and outputs electrically insulated from their surroundings, and each including a separate controlled gated switch. The transmitter has a beam adjustment element for switching the beam between a collimated beam for power transfer, and a more divergent beam for scanning, which is performed by a beam deflector. A detection system detect the presence of a receiver, and is used to ensure accurate beam impingement on the power receiving element. A controller senses when the beam is centered on the power receiving element, switches from the divergent scanning beam to the collimated beam, and instructs the beam generator to raise the power of the laser beam to a level for powering the receiver. The gate controller operates at a higher voltage than the other system control circuits.

This utility model discloses a QR code scanner with an adjustable structure, including a wireless scanner for scanning QR codes. The wireless scanner is mounted on an automatically sensing bracket adapted to it. A ring-shaped supplementary light is provided on the wireless scanner along the extension direction of its scanning beam. An adjustment component is located below the automatically sensing bracket for adjusting the tilt angle of the ring-shaped supplementary light and the automatic sensing bracket. This utility model not only adjusts the scanning angle of the wireless scanner according to the position of the QR code, but also enables the wireless scanner and the ring-shaped supplementary light to operate synchronously. This ensures that the ring-shaped supplementary light is always positioned along the extension direction of the scanning beam, preventing problems such as supplementary light shift, localized dimness or overbrightness due to angle changes, thus maintaining a consistently good supplementary lighting effect and ensuring scanning clarity and stability.

The application provides a QoS guarantee low-overhead multi-point cooperative beam tracking method based on alternating training and feedback, solves the problem that the beam training of a non-cell MIMO system has high overhead, and the tracking performance and resource utilization rate are difficult to balance. The method comprises two modules of AP training sequence decision and alternating training beam tracking. Path loss information is first collected and input into the AP training sequence decision module, and the optimal AP training sequence is obtained through offline training. Then the sequence is input into the alternating training beam tracking module, and through the iteration process of newly added scanning beams, bottleneck user identification and beam allocation, the optimal beam scheme is output by on-demand training. The application adopts a dynamic alternating training strategy, and double time scales are used to realize adaptive adjustment of the training length and optimal decision of the AP training sequence, thereby reducing the training overhead, guaranteeing the system QoS, having robustness and scalability, and being suitable for user mobile beam tracking in a high-frequency communication scene.

A tunable laser based light source for Li-Fi communication comprising a laser (1), a first optical element (3) and a second optical element (4). The first optical element (3) is configured to reflect and / or refract a scanning beam (2) emitted from the laser (1). The second optical element (4) is configured to widen the scanning beam (2) reflected / refracted by the first optical element (3). The scanning beam (2) is configured to scan a scan area extending with a first scan length in a widening direction (S1) and with a second scan length in a scanning direction (S2). The second optical element (4) is configured to widen the scanning beam (2) in the widening direction (S1) to a width greater than the first scan length, and the laser (1) and the first optical element (3) are configured to cooperate to enable the scanning beam (2) to sweep along the scanning direction (S2).

The invention discloses a beam scanning method and system for a liquid crystal phased-array antenna. The beam scanning method comprises the following steps: testing the liquid crystal phased-array antenna to obtain a test scanning beam; obtaining candidate simulation scanning beams according to the differential phase shift formula and a preset antenna simulation model; and determining a target simulation scanning beam according to the test scanning beam and the candidate simulation scanning beam. According to the invention, the accuracy of the simulated scanning beam can be improved, so that the development period of a product is shortened, and the rapid engineering realization of the liquid crystal phased-array antenna is facilitated.

The application provides a laser coherent synthesis array scanning method, device and system, which comprises the following steps: determining a far-field scanning angle according to a current scanning position; obtaining a maximum optical path difference that can be borne by a single subarray element in a laser coherent synthesis array under a blazed grating phase control model according to the far-field scanning angle and laser coherent synthesis array parameters; obtaining a required tilt phase to be applied to each subarray element according to the maximum optical path difference that can be borne by the single subarray element; and applying the tilt phase to each subarray element to complete the current scanning. The application can generate an optical path difference in the process of unit beam transmission by introducing a tilt phase control, thereby realizing beam deflection in the far field. The method can realize beam deflection at any angle in the field of view, and the energy of the scanning beam can be further improved and the scanning effect can be optimized by increasing the number of subarray elements.