131 results about "Aperture array" patented technology

The invention relates to an optical fiber hydrogen sensor based on a silver film-nanowire hole array structure and a preparation method thereof in the field of photochemical sensors. The optical fiber hydrogen sensor comprises a multimode optical fiber, and a sensing area is formed on the multimode optical fiber; the sensing area is formed by stripping a coating layer with a preset length from the multimode optical fiber, thinning the optical fiber in the area, plating a silver film on the surface of the thinned optical fiber, and adsorbing a nanowire hole array structure which is sequentially and vertically arranged on the surface of the silver film in a liquid level self-assembly manner; the nanowire hole array is of a metal-medium-metal (MIM) structure, a gold-palladium nanowire array is arranged at the bottom, an intermediate medium layer is made of aluminum oxide, and a silver film with a hole array in any shape is arranged at the top. When light is transmitted to a sensing area from a fiber core of the multimode optical fiber, the light and a metal silver film can excite a surface plasmon resonance (SPR) effect, meanwhile, an MIM structure formed by a gold-palladium nanowire, an aluminum oxide dielectric layer and a porous silver film serves as an optical coupling antenna through a local surface plasmon resonance (LSPR) effect at the edge of a top hole, and the optical coupling antenna is used for transmitting the light to the sensing area. Light energy is efficiently converged and excited in an extremely bound gap plasmon (Gap Plasmon) in an aluminum oxide dielectric layer, so that far-unconventional electromagnetic field enhancement is generated in a sensing core area, and the sensitivity of the sensor is greatly improved.

The invention relates to the technical field of underwater acoustic signal processing in a sonar system, in particular to a large-aperture array robust adaptive waveform recovery method based on focusing covariance sparse reconstruction, and the method comprises the steps: carrying out the time-frequency transformation of all array element receiving time domain data, and obtaining array element domain-frequency domain data; constructing sampling covariance matrixes corresponding to different frequency points according to the array element domain-frequency domain data; constructing a multi-frequency-point focusing covariance matrix according to the sampling covariance matrix and the array manifold vector corresponding to each frequency point; constructing a sparse dictionary matrix adaptive to the focusing covariance matrix according to the linear relation between the focusing covariances of the frequency points, and obtaining a sparse expression of the focusing covariance matrix; according to the sparse representation form of the focusing covariance matrix, utilizing a sparse criterion to carry out iterative reconstruction on the focusing covariance matrix; and robust adaptive waveform recovery is carried out by using the focusing covariance matrix after sparse iteration reconstruction. According to the method, the short-time adaptive waveform recovery performance of the large-aperture array is remarkably improved.

The invention provides a deep-sea large-aperture array deconvolution near-field high-precision direction finding method based on sound velocity correction. According to the method, an equivalent sound velocity mapping table generated by a BELLHOP ray model is established, a sound ray bending effect is innovatively converted into a real-time table look-up correction mechanism, sound velocity correction time delay is injected in beam forming and deconvolution calculation, the problem of PSF distortion of a traditional linear model in a deep sea near field is thoroughly solved, high-precision direction finding and distance measuring are achieved, and the accuracy of direction finding and distance measuring is improved. And a subversive direction finding solution with physical accuracy, algorithm stability and engineering real-time performance is provided for the deep-sea large-aperture array.

A telecentric charged particle beam, which can be an electron beam, is directed through an array of apertures to divide the telecentric charged particle beam to a plurality of telecentric illumination beamlets. The telecentric illumination beamlets through an imaging lens, a field lens at an intermediate image plane, and a transfer lens. The telecentric illumination beamlets are scanned as the telecentric illumination beamlets are directed through an upper scan deflector and a lower scan deflector and directed onto a workpiece on a stage.

The embodiment of the invention discloses an orientation estimation method, device and system for leakage noise of a water supply network. The method comprises the following steps: acquiring an acoustic signal acquired by a positioning array, wherein the array element spacing of the positioning array is smaller than half-wavelength; the method comprises the following steps of: extracting a main frequency band of each channel signal in an acoustic signal by utilizing power spectral density based on the channel signal acquired by each array element in the acoustic signal; the method includes determining an adaptive dominant frequency band of an acoustic signal based on dominant frequency bands of all channel signals in the acoustic signal. Furthermore, the method includes estimating the orientation of the leakage noise by using a beamforming algorithm based on the acoustic signal and its adaptive dominant frequency band. In this way, according to the embodiment of the invention, the small-aperture array can be used for replacing a leakage listening rod to collect the sound signals of the pipe network, the frequency component with the high signal-to-noise ratio in the self-adaptive main frequency band is screened out from the sound signals, and then high-resolution orientation estimation is achieved through the beam forming algorithm.

The invention relates to a mobile dipole sound source positioning device and method of a minimum aperture array, the device comprises a vector sound transmission array and a processor, the vector sound transmission array comprises at least three array elements, the distance between the array elements is 1 / 6 lambda, lambda is the wavelength, the vector sound transmission array is used for measuring sound pressure signals, the processor is used for processing the sound pressure signals, and the processor is used for processing the sound pressure signals. And a positioning result of the dipole source is solved through a nonlinear optimization algorithm. The method comprises the following steps: measuring a sound pressure signal within a preset time by using a vector sound transmission array, and converting a measured time domain sound pressure signal into a frequency domain sound pressure signal; calculating a vibration velocity signal according to the frequency domain sound pressure signal, and establishing a dipole sound source propagation model; and performing nonlinear optimization solution on the dipole sound source propagation model to obtain a positioning result of the dipole source. Compared with the prior art, high-precision and real-time positioning of the moving dipole source can be realized.

A phase-difference-based high-resolution azimuth estimation algorithm for a small-aperture array with multiple targets comprises the following steps: 1) according to various array structures, the coordinate vectors of the array elements are subtracted and then combined accordingly to obtain new vectors along each coordinate axis; 2) the phase of each array element is obtained by performing a fast Fourier transform on the array element sampling data, the phase difference between the array elements is obtained by subtracting the phase of each array element, and the phase differences are combined according to the combination of the array element coordinate vector differences to extract the component k of the incident direction along each coordinate axis. x , k y and k z 3) After obtaining the various components of the incident direction, the unambiguous incident angle across the entire spatial range is calculated using inverse trigonometric functions. This invention utilizes a combination of array element sampling data to achieve more accurate target direction estimation, enhances resistance to noise and other interference, and broadens the applicable frequency band, enabling flexible application to various arrays, as well as direction estimation using multi-line spectrum signals and broadband signals.

A rapid-deployment satellite communications (satcom) terminal apparatus includes a base capable of rotation relative to a platform (e.g., a mobile platform or trailer to which the apparatus may be mounted or from which it may be detached), and a passive planar array panel comprising an array of antenna elements or apertures, the passive planar array panel pivotably and slidably attached to the base. The passive planar array panel includes a feed arm and feed antenna, the arm articulable relative to the panel and the antenna articulable relative to the arm. The feed antenna transmits and / or receives EM energy focused by the antenna elements in a beam direction adjustable by an array controller to a desired azimuth and elevation via electromechanical adjustment of, respectively, the rotational orientation of the base and the slant angle of the passive planar array panel relative to the platform.

A multi-aperture array for manipulating a plurality of charged first single-particle beams, comprising: a base body with a plurality of apertures, wherein, during operation of the multi-aperture array, one of the charged first single-particle beams passes through each aperture; at least a plurality of first electrodes, wherein one of the first electrodes is arranged at each of the apertures to individually influence the first single-particle beam passing through the aperture, and wherein each of the first electrodes is connected to a control unit; wherein the base body has a first depth TG in a z-direction along which the first apertures extend through the base body; wherein the first electrodes each have a depth TE in the z-direction that is less than the depth TG, i.e., TE < TG;wherein the first electrodes are each embedded in the base body such that they are exposed in an area adjacent to and forming the aperture, and are otherwise embedded directly in the base body and thus without an electrical insulating layer; and wherein the material of the base body is glass or consists of glass.

The present application relates to the image processing method of optical remote sensing imaging detection, specifically relates to a multi-modal image fusion method and imaging system, in order to solve the existing technical image capture of target scene depends on time-sharing type imaging system or multi-device acquisition, resulting in different modal image registration difficulty, low registration accuracy, image edge details are inconsistent, the deficiency of poor fusion effect, the multi-modal image fusion method of the present application includes the original image and characteristic spectrum of target scene, multi-modal image preprocessing and multi-modal image fusion steps, based on the spectral radiation curve of target scene, spectral image and polarization image realizes multi-modal image fusion.Simultaneously, provide a kind of multi-modal image imaging system, including sub-aperture array compound eye unit, for obtaining the original image of target scene, realize the spectral image and polarization image of target scene are acquired simultaneously.

A lens element of a charged particle system comprises an electrode having a central opening. The lens element is configured for functionally cooperating with an aperture array that is located directly adjacent said electrode, wherein the aperture array is configured for blocking 5 part of a charged particle beam passing through the central opening of said electrode. The electrode is configured to operate at a first electric potential and the aperture array is configured to operate at a second electric potential different from the first electric potential. The electrode and the aperture array together form an aberration correcting lens.

Systems and methods are described, and one system includes a three-dimensional (3D) geometric tracker connected to a multiband (MB) inverse synthetic aperture array radar (ISAR), and a classification / alarm logic. The MB ISAR includes spatially distributed radar transmitters (TXs) and receivers (RXs), a TX / RX allocation logic, and a tomographic (TM) image logic. The TX / RX allocation logic is configured to receive 3D tracking data from the 3D geometric tracker, indicating subject 3D position and 3D orientation and, in response, dynamically allocate TXs and RXs to maintain MB illumination of and maintain MB reception of multiple scatter angles from subjects. The TM image processor is configured to construct TM images from the scatter angles, using 3D tracking data, for input to the classification and alarm logic. Optionally, the TX / RX resource allocation logic is configured to receive situation feedback data, for feedback adjusting of allocation of TXs and RXs.

The invention relates to the field of infrared thermal imaging, in particular to a miniaturized medium-wave infrared curved surface bionic compound eye optical system which comprises a curved surface multi-aperture array, an optical relay image rotation unit and an infrared detection unit. The curved surface multi-aperture array is of a compound eye structure formed by a plurality of sub-eyes with the same parameters. And the number of the lenses contained in each sub-eye is not more than 3. The optical relay image rotation unit converts a focal curved surface image of the curved surface multi-aperture array into a focal plane image, and the focal plane image is collected to the infrared detection unit. The number of lenses contained in the optical relay image rotation unit is not more than 6, and the optical relay image rotation unit has an object curved surface with the same curvature radius as the curved surface multi-aperture array and is matched with a diaphragm of the infrared detection unit. The system has the advantages of multiple compound eye apertures, light weight, miniaturization, large relative aperture, large target surface size, large field of view, high spatial resolution, cold diaphragm matching and the like, can perform operations such as quick capture, positioning and distance measurement on a moving target, and is particularly suitable for application scenes such as high-altitude over-the-ground wide-area detection, quick moving target positioning and tracking and the like.

A gun lens receives an electron beam or other particle beam, which is then divided into beamlets by an aperture array. Each of the beamlets is telecentric. A global imaging lens receives the beamlets from the aperture array. A micro deflector array on a plane of the global imaging lens includes deflectors configured to be individually controlled.

To stabilize a temperature of a molding aperture array substrate.SOLUTION: A multi charged particle beam lithography method includes the steps of: discharging a multi charged particle beam and using a plurality of blankers provided in a blanking aperture array substrate to switch ON / OFF of a predetermined beam in the multi charged particle beam; and transferring control data for controlling ON / OFF of each beam of the multi charged particle beam to a control circuit of the blanking aperture array substrate while moving a stage which is installed in a lithography chamber, and drawing a pattern by irradiating a lithography target substrate, which is mounted on the stage, with the multi charged particle beam based on the control data. The control circuit is operated during a beam non-irradiation time in which the lithography target substrate is not irradiated with the multi charged particle beam.SELECTED DRAWING: Figure 1

The embodiment of the invention provides an MEMS chip, an MEMS system and electronic equipment. The MEMS chip comprises a back polar plate, and the back polar plate is provided with a fixed supporting area which is used for being fixedly connected with a supporting structure; the acoustic action region is arranged opposite to the vibrating diaphragm to form an acoustic capacitance structure; wherein the acoustic action area is provided with acoustic through holes, and at least part of the acoustic through holes form a gradually-changed aperture array area; in the gradually-changed aperture array area, the characteristic apertures of the acoustic through holes are continuously and progressively decreased towards the edge direction along the radial direction of the gradually-changed aperture array area; the characteristic aperture is defined as the diameter of a minimum circumcircle determined by taking the geometrical shape of the acoustic through hole as a reference.

A beamlet is generated from an electron beam using an array of apertures downstream of a single global collimating lens. The beamlets are directed through an image lens array downstream of the aperture array in the path of the beamlets, the beamlets being individually focused onto an intermediate image plane using the image lens array. The beamlet is then directed at a workpiece on a stage using a transfer lens array downstream of the image lens array. The paths of the beamlets do not include intersections.

Optical transmission element (1), with - a first planar microlens arrangement (2) and - a second planar microlens arrangement (3) arranged parallel to the first microlens arrangement (2), - wherein a planar aperture arrangement (4) with a plurality of aperture elements (5) each having at least one aperture (6) is arranged between the two microlens arrangements (2, 3) and parallel thereto, - wherein each aperture element (5) is assigned to a microlens (7, 8) of the first and second microlens arrays (2, 3) and is arranged in their focal plane (F), and - wherein the microlens arrays (2, 3) and the aperture array (4) are arranged such that light incident on the first microlens array (2) is, depending on its angle of incidence (W), either transmitted through the aperture array (4) and the second microlens array (3) or absorbed or reflected at the aperture array (4), characterized in that - the diaphragm elements (5) are each arranged within the focal plane (F) of the microlens arrays (2, 3) and at the same time offset from the optical axis (A) of the microlens arrays (2, 3), and that - the optical transmission element (1) is formed as a film into which the diaphragm arrangement (4) is completely embedded, and on one side of which the first microlens arrangement (2) and on the other side of which the second microlens arrangement (3) are arranged.

The present embodiment provides a multi-charged particle beam drawing apparatus that suppresses a beam position shift on a sample surface. The charged particle beam drawing apparatus of the present embodiment is a multi-charged particle beam drawing apparatus including: a blanking aperture array substrate provided with a plurality of blankers that perform blanking deflection of a plurality of charged particle beams that constitute a plurality of beams; and a first shielding member disposed on a downstream side of the blanking aperture array substrate in a traveling direction of the plurality of beams, having a cylindrical portion through which the plurality of beams pass inside, and being composed of a high magnetic permeability material.

Provided are a multi-charged particle beam drawing method, a multi-charged particle beam drawing apparatus, and a computer-readable recording medium, which can improve the drawing accuracy of a multi-beam. The multi-charged particle beam drawing method of the present embodiment includes: a data path for inputting control data for controlling the on or off of each beam of a multi-beam to a unit array on a blanking aperture array substrate, dividing, according to each input-output circuit of a plurality of input-output circuits and at least any one of a plurality of wiring groups concentrated based on the inter-wiring distance of a plurality of wirings to the plurality of input-output circuits, into a plurality of first blocks, for each of the plurality of first blocks after the division, calculating a first shift amount of each of the plurality of first blocks of the multi-beam due to at least any one of an electric field and a magnetic field, and a process of correcting the irradiation position or the irradiation amount of the multi-beam based on the first shift amount and irradiating each beam of the multi-beam.

The application discloses a large-aperture array antenna subarray structure adjustment method facing electrical performance, and comprises the following steps: S1, determining maximum gain loss; S2, establishing sensitivity distribution matrix; S3, calculating position tolerance distribution weight; S4, giving initial installation tolerance standard; S5, calculating position tolerance distribution matrix; S6, generating position error random sample; S7, calculating antenna electrical performance; S8, judging whether the position error random sample meets the requirement; S9, calculating new position tolerance standard; and S10, calculating maximum allowed structure adjustment amount. The application can realize the target of taking antenna electrical performance as the target, quantitatively giving the subarray structure adjustment amount of different regions of a large-aperture array antenna, strictly requiring the structure precision of the subarray in the region with high electrical performance sensitivity, appropriately reducing the structure precision requirement in the region with low electrical performance sensitivity, reducing the processing and manufacturing difficulty of the large-aperture array surface, improving the adjustment efficiency of the large-aperture array antenna, and guaranteeing the high performance of the array antenna.

The present invention relates to an applicator for applying a plant treatment agent to a plant via a container, the applicator having: an applicator shell defining an applicator cavity, an applicator cavity inlet end and an applicator cavity outlet end spaced apart from the applicator cavity inlet end by the applicator cavity, and wherein the applicator cavity outlet end defines a linear aperture array, and wherein apertures of the linear aperture array are disposed along an array axis.

This invention provides a metal mask for silicon-based liquid crystal light valve chips, relating to the field of semiconductor optoelectronic device manufacturing technology. It includes a metal substrate and a pixel aperture array, alignment mark area, stress buffer, and reinforced border disposed on the metal substrate, adaptable to mass production evaporation and photolithography processes for LCoS light valve chips. The metal substrate consists of four layers stacked sequentially from bottom to top: a substrate layer, a molybdenum transition layer, a Mo-Ta-N functional pattern layer, and an Al2O3-SiO2 composite passivation layer. The molybdenum transition layer is deposited on the substrate surface using magnetron sputtering, with a surface roughness Ra < 0.15 nm. The Mo-Ta-N functional pattern layer is deposited on the surface of the molybdenum transition layer using reactive magnetron sputtering. The near-vertical, low-roughness aperture sidewalls of this invention result in shadow-free evaporation, uniform electrodes, and clear edges, improving the light utilization and contrast of the LCoS chip. It also increases the utilization rate of the evaporation material and reduces material loss during mass production.

Maintain reading quality. [Solution] The reading head (6) has a substrate (14) on which a plurality of image pickup elements (33) are mounted in the X direction, a lens unit (20) that receives light from the object (4) to be inspected and passes it toward the image pickup elements (33) to converge it, and a holder (12) that supports the substrate (14) and the lens unit (20). The lens unit (20) has a first lens array (22) in which a plurality of first lenses (22L) are arranged in the X direction and on which light is incident, a second lens array (30) in which a plurality of second lenses (30L) are arranged in the X direction so that their optical axes coincide with those of the first lenses (22L) and that converges the light incident from the first lens array (22), and an aperture array (25) in which a plurality of apertures (25A) are arranged in the X direction between the first lens array (22) and the second lens array (30L) so that their optical axes coincide with those of the first lenses (22L) and the second lenses (30L).

The invention relates to a multi-beam pattern definition device for use in a particle-beam processing or inspection apparatus, said device being adapted to be irradiated with a beam of electrically charged particles and allow passage of the beam through a plurality of apertures thus forming a corresponding number of beamlets, said device comprising an aperture array device in which at least two sets of apertures are realized, an opening array device located downstream of the aperture array device having a plurality of openings configured for the passage of beamlets, said opening array device comprises impact regions, wherein charged impinge upon said impact regions.

This application discloses an optical sensing structure and an optical detector, belonging to the field of integrated optical sensing technology. It aims to achieve on-chip integrated construction and efficient electro-optical control of high-order singular surfaces to improve the signal response intensity and weak signal detection limit of optical sensing. The optical sensing structure includes an optical waveguide, multiple micro-ring resonators, a circular aperture array, and multiple sets of metal electrodes. The optical waveguide and multiple micro-ring resonators are formed by etching optically functional thin films with electro-optic effects. The multiple micro-ring resonators are arranged sequentially along the extension direction of the optical waveguide and are evanescently coupled to it. The circular aperture array is disposed at the end of the optical waveguide to reflect the transmitted optical signal, forming a closed optical loop. Multiple sets of metal electrodes are respectively arranged in pairs on both sides of the optical waveguide and segmented along the waveguide, corresponding to the optical waveguide regions between two adjacent micro-ring resonators and between the micro-ring resonators and the circular aperture array away from the input end of the optical waveguide.

This disclosure relates to an environmental control system used in an aircraft, including at least one component positioned along the length of the aircraft and a decompression plate assembly comprising an array of apertures. The aperture array is based on the position of the decompression plate assembly relative to the at least one component along the length of the aircraft.

Systems and methods described herein relate to a near-eye display using a pinhole aperture array. In some examples, a near-eye display system includes a ray-limiting structure to provide a pinhole aperture array with a plurality of apertures. The plurality of apertures can each have a shape defined by radially extending elements. Examples also describe extended reality (XR) devices including such a near-eye display system and methods utilizing the near-eye display system.

A modular, multi-height hitch attachment system for skid steer loaders is disclosed. The system includes a lightweight, high-strength frame configured to engage the quick-attach mounting plate of a skid steer without tools, utilizing the machine's integrated locking pin mechanism. The frame comprises a vertically oriented aperture array that permits selective height adjustment of trailer hitches or modular worksite tools. In single-unit use, the system supports accessories such as vises, workbenches, and welding platforms. In dual-unit configuration, two systems operate in tandem to support wide-span or load-bearing implements such as forks or hay spears. The device reduces attachment weight by over 70%, fits within a standard truck toolbox, and offers enhanced visibility and operational versatility. Modular accessories are quickly interchangeable in the field, enabling rapid task transitions and expanding the functional capability of skid steer equipment across construction, agricultural, and industrial applications.

Technologies directed to overlaid shared aperture array with improved total efficiency are described. One RF structure includes a first antenna with a first set of antenna elements disposed on a first plane of a support structure and a second antenna with a second set of antenna elements disposed on a second plane of the support structure. A set of parasitic antenna elements are disposed on the first plane. Two adjacent antenna elements, including one from the first plurality of antenna elements and another one from the plurality of parasitic antenna elements, are separated by the second distance.