106 results about "Beam shaping" patented technology

A broadband omni-directional bicone antenna. The antenna can comprise conductive surfaces of conical voids provided within a solid dielectric structure. The outside surface of the solid structure can support a radio frequency (RF) lens geometry operable for beam forming. The beam forming can modify the elevation pattern of the electromagnetic radiation from the bicone antenna. The solid dielectric structure may be machined or molded from a single piece of material. The conical voids provided within the solid structure can be metallized to provide conductive bicone radiators. The outer surface beam shaping lenses can be zoned or continuous and can provide elevation patterns with increased gain, cosecant squared falloff, or various other patterns. The beam shaping lens may be formed from any low-loss dielectric. Alternatively, the lens may be formed from a less dense material such as dielectric foam that can support radial conductive beam forming vanes.

The invention relates to a laser deep penetration welding method for producing a metallurgical joint of at least two oxide-coated metallic workpieces (1, 2) by means of a laser beam unit (11) which is controlled for laser beam shaping of a laser beam (10) such that a temperature gradient (gradT) is generated in the liquid melt of the weld seam (4') to form a broad-lens-shaped weld seam (4'), which results in a broad-lens-shaped weld seam (4') with a contour angle (α) relative to the joining zone (3). F ) of less than 80 degrees, in particular of less than or equal to 75 degrees and a width-to-depth ratio between 1:0.8 and 1:1.2.

The application discloses an independently replaceable space beam combining semiconductor laser array, which is used for solving the problems of high maintenance cost, high power loss and low space beam combining efficiency of a traditional semiconductor laser bar. The application comprises a carrier, N semiconductor lasers and N sets of beam shaping components which are arranged side by side and independently installed on the carrier. Each semiconductor laser comprises a positive electrode sheet, a semiconductor laser bar, a negative electrode sheet and an insulating pressing sheet which are connected in sequence from bottom to top. The positive electrode sheet is connected in series with the negative electrode sheet in the adjacent semiconductor laser. The light emitting end of each semiconductor laser bar is directed to the corresponding beam shaping component. The connecting end of each positive electrode sheet and negative electrode sheet is located at the back light end of the corresponding semiconductor laser bar. Each set of beam shaping components comprises a fast-axis collimator, a slow-axis collimator and a light path turning piece which are arranged in sequence along the light path. All the light path turning pieces are arranged in parallel, so that the space beam combining of the outgoing light of the semiconductor laser bar in the fast-axis direction is realized.

The application discloses a kind of mounting mobile container bottom cross beam shaping device and its working method, belong to container maintenance technical field, including frame, the lower part of both ends of frame is equipped with travelling mechanism respectively, the upper part of both ends of frame is equipped with mounting travelling component respectively, the side of two mounting travelling components that face each other is equipped with opening and closing drive unit respectively, the side of two mounting travelling components that relatively far away is equipped with telescopic drive unit respectively;Mounting travelling component includes clamping wheel drive assembly and deviation correction encoder, clamping wheel drive assembly is set at container bottom longitudinal beam, deviation correction encoder is set in the front of clamping wheel drive assembly along the direction of device travel;The middle frame of two mounting travelling components is slidably installed with vertical correction unit and horizontal correction unit, and vertical correction unit and horizontal correction unit can move along the length direction of frame.The application realizes that shaping can be moved along container bottom longitudinal direction under mounting state, improves operation continuity and shaping efficiency.

The present application relates to the technical field of secure communication, and in particular to a satellite-to-ground communication security beam shaping method based on active RIS and related equipment, a communication model containing a plurality of users, eavesdroppers, ground base stations, SATs and active RIS is first constructed to accurately simulate complex communication scenarios. Based on the model, an optimization function is constructed to minimize the ground base station transmission power as the target, while meeting the primary and secondary user quality of service requirements and limiting the eavesdropper's eavesdropping ability as the constraint condition. In order to reduce the complexity of solving, the optimization function is decomposed into two sub-problems, and an alternating optimization algorithm is adopted to optimize the ground base station passive beam shaping vector when the active RIS beam shaping matrix is fixed, and to optimize the active RIS beam shaping matrix when the passive beam shaping vector is fixed. Through iteration until convergence, the optimal passive beam shaping vector and active RIS beam shaping matrix are finally obtained, and the efficient and secure operation of the communication system is realized.

This invention relates to the field of laser processing technology, and discloses a method and system for femtosecond laser three-dimensional surface processing based on adaptive optics. The method includes: spatial topology reconstruction of the original point cloud data of the workpiece to be processed to obtain a three-dimensional digital surface; row spacing planning and optimization of the three-dimensional digital surface to obtain a spatial processing trajectory, and point wavefront mapping of the spatial processing trajectory to obtain pre-compensated phase distribution data; optical field distortion analysis of the surface reflected light signal of the workpiece to be processed to obtain the actual wavefront phase; encoding the pre-compensated phase distribution data into an initial wavefront control command for a beam shaping device, and iteratively optimizing the initial wavefront control command to obtain a wavefront supplement signal; and updating the spatial processing trajectory by combining the real-time contour data of the workpiece to be processed. This invention can improve the efficiency of femtosecond laser three-dimensional surface processing based on adaptive optics.

The application discloses a kind of for CFRP big depth-diameter ratio array hole multi-pulse width laser composite processing system and method.The system includes: multi-pulse width laser generation module, for outputting two initial laser beams;Beam shaping module, for the optical axis of two initial laser beams is adjusted to coaxial, the initial laser beam is shaped, adjusts the polarization state of initial laser beam, initial laser beam is modulated into two sub laser beams, adjusts the energy distribution of two sub laser beams, two sub laser beams are converted into two mirror image symmetrical distribution in the focusing laser beam array of two sides of the CFRP matrix to be processed.The application can be applicable to the high-efficiency high-precision processing of CFRP big depth-diameter ratio array hole, and nanosecond laser is used to improve processing efficiency, and femtosecond laser is used to effectively inhibit carbon fiber delamination and thermal damage of resin matrix.

Provided are a beam shaping device (10), a neutron capture therapy system (20), and a moderator auxiliary mounting system (30), relating to the technical field of medical equipment. The beam shaping device (10) comprises a moderator assembly (100) and a fixing mechanism (300). An accommodating cavity (200) is formed in the beam shaping device (10), and the moderator assembly (100) is disposed in the accommodating cavity (200). The moderator assembly (100) is configured for adjusting the energy of a neutron beam, and the fixing mechanism (300) is configured for fixing the moderator assembly (100) in the accommodating cavity (200). The mounting stability of the moderator assembly (100) in the accommodating cavity (200) is ensured, and the structural stability of the beam shaping device (10) is improved, such that the beam shaping device (10) can be applied in a vertical irradiation chamber (642).

The invention relates to a collimator, in particular for a radiotherapy device, comprising a liquid crystal beam shaping device. The invention further relates to a controller for a collimator of a radiotherapy device and a radiotherapy system comprising the controller and a radiotherapy device. The invention further relates to a method of controlling a collimator of a radiotherapy device.

The present application relates to the technical field of lamps, and provides an explosion-proof hand lamp, which comprises a lamp head assembly and a lamp body assembly; the lamp head assembly comprises a lamp head shell, a lamp plate, a light distribution lens and a light uniformizing cover; lamp grooves are formed in two large faces of the lamp head shell; the lamp plate is arranged in the lamp grooves; the light distribution lens is connected with one large face; and the light uniformizing cover is connected with the other large face, so as to cover the openings of the lamp grooves on two sides. According to the present application, the light distribution lens and the light uniformizing cover are arranged on the two large faces of the same lamp head shell respectively, and the lamp plate has light emitting conditions corresponding to the lamp grooves on two sides at the same time, so that two sets of different light emitting mechanisms are integrated on the same explosion-proof hand lamp: one side can obtain a light beam shaping with more directionality, and the other side can obtain more uniform and soft diffuse illumination; in combination with the hinged adjustable pointing of the lamp head and the lamp body, the operator can switch between different illumination forms and illumination directions according to the needs of the activity environment, so that the problem that the traditional explosion-proof hand lamp has only single light distribution and is difficult to adjust the illumination demand with the change of the environment is solved in structure.

Tunable optical metasurfaces can include an optically reflective surface to reflect optical radiation, such as infrared laser light. An array of optical resonant antennas can extend from or otherwise be positioned on the reflective surface, for example, at sub-wavelength spacing, e.g., less than half a wavelength. Voltage-controlled liquid crystals can be positioned in the optical field region of each optical resonant antenna. A controller can apply a voltage differential bias pattern to the liquid crystals of the optical resonant antennas, which can be arranged in a tiled, staggered, or randomly arranged subset of optical resonant antennas to obtain one-dimensional beam control, two-dimensional beam control, and / or spatial beam shaping.

The present application relates to the field of disposable hygiene products, in particular to a laser preheating system for preheating the waistband material of disposable hygiene products before welding, comprising: a light source module for emitting laser; a beam shaping module for adjusting the laser emitted by the light source module into a light spot with a preset energy distribution and geometric shape, and projecting it onto the surface of the waistband material to be preheated; a temperature feedback control module comprising a temperature sensor and a controller, the controller is configured to dynamically adjust the output power of the light source module according to the difference between the real-time temperature of the material surface collected by the temperature sensor and the preset target temperature, so as to maintain the preheating temperature of the material within a preset value range. It solves the technical problem that the waistband material of disposable hygiene products is in a normal temperature state when entering the welding station, resulting in poor welding performance. A laser preheating method is also proposed.

A radiotherapy apparatus is described. The radiotherapy apparatus comprises a radiation source, a beam shaping apparatus, a beam receiving apparatus, and a controller configured to control the beam shaping apparatus. The radiation source is configured to deliver radiation in each of a coplanar configuration and at least one non-coplanar configuration. The beam shaping apparatus is configured to direct the radiation produced by the radiation source towards the beam receiving apparatus in each of the coplanar configuration and the at least one non-coplanar configuration. The controller is configured to control the beam shaping apparatus to apply a limit on a field of radiation produced by the radiation source based on whether the radiation source is configured in the coplanar configuration or the at least one non-coplanar configuration.

An optical system includes a display, a lens assembly, and a multilayer beam shaping film disposed between the lens assembly and the display. The optical system is configured to display a virtual image for viewing at an exit pupil of the optical system. The beam shaping film includes an array of optically transparent lenses arranged two-dimensionally on an opaque layer. The opaque layer defines a plurality of through openings aligned with the lenses. For an image light cone emitted from each position on an image formed by the display, the beam shaping film transmits and shapes the emitted cone such that the transmitted and shaped cone exits the lens assembly as collimated image light having a first integrated energy E1, and passes through and substantially fills the exit pupil, the passed collimated image light having a second integrated energy E2, such that E2 / E1 ≥ 0.2.

The present invention relates to a monolithic telescope (22) for compensating off-axis aberrations in a thin disk laser gain module comprising a parabolic mirror (15) and a gain medium. The monolithic telescope (22) features two spaced-apart, cylindrical, concave surfaces in the direction of the pump source, and convex in the direction of the parabolic mirror (15), each surface having distinct radii (R1 and R2, where R1 > R2). This configuration enables the telescope to shape and direct a pump beam toward the parabolic mirror (15), compensating for aberrations introduced by the mirror and ensuring a circular, evenly distributed pump spot on the thin disk gain medium. The invention also includes a method of using the monolithic telescope (22) in a thin disk laser setup to achieve multiple amplifications of the pump beam, enhancing the efficiency of the laser output.

The application discloses a kind of laser detection systems, methods, media and computer program products, it is related to semiconductor detection technical field.The laser detection system includes: through focusing collimation module, the reflection laser beam generated after wafer is irradiated by incident laser beam is collected, and reflection laser beam is focused and collimated, obtain first laser beam, first laser beam diameter is consistent with the emission laser beam output by equipment light source according to the preset shrinkage ratio by shrinkage module, form second laser beam;By mirror group adjustment propagation path, make second laser beam and emission laser beam meet in the preset transmission region of beam combiner, utilize beam combiner to carry out beam combination and generate third laser beam, by beam shaping module, complete third laser beam shaping according to detection demand, output for laser detection incident laser beam.That is, by the fusion of reflection laser beam and emission laser beam, the influence of stray light and laser speckle on laser detection is reduced, and the stability of laser detection is improved.

This invention relates to a zero-space electrostatic beam focusing device, comprising a front focusing structure and a rear focusing structure. The front focusing structure is disposed at the front end of the accelerating tube, and the rear focusing structure is disposed behind the front focusing structure. The front focusing structure includes a lens flange, a high-voltage terminal, a first electrode, a second electrode, and a first dish electrode, thereby forming a symmetrical electrostatic field distribution at the front end of the accelerating tube, constituting an equivalent three-film electrostatic lens structure, realizing the pre-focusing function before the beam enters the accelerating tube. The rear focusing structure includes at least one focusing unit, which includes a second dish electrode, a third dish electrode, and a fourth dish electrode, thereby forming an equivalent three-film electrostatic lens structure inside the accelerating tube, realizing the beam shaping function transmitted inside the tube. Without increasing the longitudinal dimension of the accelerator system and without introducing additional independent focusing devices, the beam focusing function is integrated into the accelerating structure in an embedded manner, thereby saving system space and reducing system power consumption.

This invention relates to the field of laser processing inspection technology, and discloses an online optical device and method for monitoring laser output power. The monitoring optical device includes a laser power detector, a forward shaping device, and a perforated mirror. The forward shaping device shapes a large-diameter Gaussian beam into a beam centered on a small-diameter Gaussian beam with an outer ring of light. A detection aperture is formed at the center of the perforated mirror along the axial direction of the forward shaping device. The small-diameter Gaussian beam passes through the detection aperture to the laser power detector, and the outer ring light is reflected by the perforated mirror into the processing optical path. This application also discloses a monitoring method based on the above-mentioned monitoring optical device. The monitoring optical device and method of this application fundamentally eliminate the influence of changes in the polarization state and incident angle of the light source on the transmitted output laser power, maintain stable laser output power monitoring, have high detection accuracy, and improve the reliability of the online monitoring system.

The present invention provides an integrated antenna device and a phase calibration method that can be assembled as a large antenna array and that can obtain the phase error between each patch antenna unit in the integrated antenna device through a simple calculation. [Solution] The integrated antenna device 100 includes an antenna array formed by a plurality of patch antenna units and a beam shaping integrated circuit. The patch antenna units, which are installed on the first surface of the substrate, are arranged symmetrically around the center of the antenna array, and each patch antenna unit includes a first feed point and a second feed point. The beam shaping integrated circuit, which is installed on the second surface of the substrate, is connected to the first and second feed points of the patch antenna units. The first and second feed points of the patch antenna units are located outward relative to the array center of the antenna array of the patch antenna units, and the beam shaping integrated circuit overlaps with the central region of the antenna array.

A luminaire includes a light source configured to generate an emitted light beam and an interchangeable lens subsystem positioned after the light source and before an imaging plane in an optical path of the luminaire. The interchangeable lens subsystem includes a first lens having a first focal length and a second lens having a second focal length. The second focal length is different than the first focal length. In a first configuration of the interchangeable lens subsystem, the first lens is positioned in the emitted light beam, and in a second configuration of the interchangeable lens subsystem, the second lens is positioned in the emitted light beam.

The application discloses a series feeding directional pattern shaped patch antenna, which is a compact, low-cost, high-gain and arbitrary beam shape realizable series feeding antenna, and achieves the purpose of miniaturization of the shaped antenna. The antenna comprises a dielectric substrate, a feeding line, a plurality of radiation patches and a metal grounding plate. The dielectric substrate comprises oppositely arranged top and bottom surfaces; the feeding line and the radiation patches are attached to the top surface of the dielectric substrate; and the metal grounding plate is attached to the bottom surface of the dielectric substrate. The plurality of radiation patches are distributed along the feeding line, and a slot structure one is formed on the radiation patches; and a slot structure two is formed at a set position of the feeding line. The application realizes the accurate control of the amplitude and phase of the unit through the special design of the series feeding antenna and the radiation unit, so as to achieve the purpose of realizing arbitrary beam shaping of the microstrip traveling wave series feeding antenna.

The application discloses a curved surface array implicit aperture expansion imaging method based on sparse enhanced iterative adaptive processing, belongs to the technical field of array signal processing and beam imaging, and particularly relates to a high-resolution imaging algorithm for a non-planar (curved surface) conformal array. The core realizes accurate beam focusing, sidelobe suppression and robust beam pointing through virtual element expansion and iterative adaptive (IAA) beam shaping technology, and can be widely adapted to various systems such as radars, sonars and radio positioning systems.

The application discloses a high-power semiconductor laser fiber coupling system based on total reflection and belongs to the technical field of lasers. The system comprises two groups of semiconductor laser array modules, a fast-slow axis collimating mirror array, a dichroic mirror for wavelength beam combining, a reflecting mirror for light path folding, a beam shrinking device and a focusing mirror for coupling light beams into an optical fiber; an isosceles right prism group based on total reflection is used to fill the dark area in the fast axis direction. The wavelengths of the array modules in each group of semiconductor laser array modules are the same, the semiconductor laser fiber coupling system can achieve the purpose of beam shaping and obtain high-power output, and compared with the traditional method, the structure is simple and compact.

The invention provides a beam shaping device and a neutron capture therapy system, and relates to the technical field of medical equipment.The beam shaping device comprises a retarding body assembly and a fixing mechanism, a containing cavity is formed in the beam shaping device, and the retarding body assembly is arranged in the containing cavity; the retarding body assembly is used for performing energy adjustment on the neutron beam; the fixing mechanism is used for fixing the retarder assembly in the containing cavity. According to the beam shaping device, the retarder assembly can be fixed in the containing cavity through the fixing mechanism, and even if the beam shaping device is vertically installed, the fixing mechanism can provide a stable supporting effect for the retarder assembly, so that the retarder assembly is prevented from falling off from the containing cavity, the installation stability of the retarder assembly in the containing cavity is guaranteed, and the service life of the retarder assembly is prolonged. Therefore, the structural stability of the beam shaping device is improved, and the beam shaping device can be applied to a vertical irradiation chamber.

A mask writing system may include a laser source to generate a laser beam, a multibeam modulator to receive an input laser beam and generate a plurality of modulated laser beams from the input laser beam, a scanner to direct the plurality of modulated laser beams to a mask holder, and a laser beam shaping module, disposed between the laser source and the multibeam modulator. As such, the laser beam shaping module may include a multi-lens system, disposed along a primary beam path. The multi-lens system may include a first lens to receive the laser beam and output a first converging laser beam; a second lens, arranged to receive the first converging laser beam and output a second converging laser beam; and a third lens, arranged to receive the second portion of the laser beam as a diverging beam, and to output a collimated beam to the multibeam modulator.

This invention relates to a supportless μSLM fabrication method for a two-stage radial vortex generator based on characteristic rotation and critical angle shaping, and to the two-stage radial vortex generator itself. The method includes the following steps: preparing a μ-SLM device equipped with a fiber laser and a precision beam shaping system, and spherical metal powder; setting the printing parameters of the μ-SLM device and adjusting the overhang angle of the printing substrate to a calibrated critical angle; printing the component in a rare gas protective atmosphere, and monitoring the spheroidization and collapse trends of the spherical metal powder in real time; cooling the component after printing; separating the cooled component from the printing substrate, and measuring the surface roughness of the pressure and suction surfaces of the component to determine if the component meets the requirements. Compared with existing technologies, this invention has advantages such as supportless printing and high-fidelity conversion of the original aerodynamic configuration into the final product.

A high-quality beam-shaping metasurface device for high-power laser processing belongs to the fields of optics and electromagnetic wave absorption. This invention includes a substrate and an asymmetric Fabry-Perot cavity; artificial micro / nano units include H-shaped, I-shaped, double-rod, double-elliptical, or V-shaped structures. The asymmetric Fabry-Perot cavity is a three-layer composite structure of "metasurface structure layer - dielectric spacer layer - metal," achieving the device's preset low light absorption function through resonant modulation; the metasurface structure layer consists of multiple subwavelength artificial micro / nano units arranged periodically or aperiodically for controlling the transmitted wavefront. This invention achieves customized beam shaping based on topology-optimized artificial micro / nano structure units, and enhances the low absorption capability of the metasurface device based on asymmetric Fabry-Perot cavity structure optimization. This invention maintains high optical efficiency and robustness under high power density conditions, achieving high-precision control of beam energy distribution, phase, and wavefront, enabling customized laser processing.

The present application belongs to the technical field of laser ranging, and relates to a ranging system and method based on an asynchronous array single-photon detector. The system comprises a synchronous control module, an active illumination light source, a beam shaping unit, a core control module, a detection imaging system and an upper computer. The present application also proposes a ranging method based on an asynchronous array single-photon detector, which is suitable for the system. The present application can realize ranging and imaging functions by using only a single asynchronous array single-photon detector. Through the working mode of asynchronous array detection and statistical imaging, the dead time effect of the traditional single detector is dispersed to each independent pixel in the area array, thereby effectively reducing the adverse effects of the dead time on the ranging accuracy and data acquisition efficiency. In the meanwhile, the data acquisition efficiency is improved, and the ranging accuracy is further improved, which is suitable for high-speed, high-resolution ranging and three-dimensional imaging applications.

This portable laser surface treatment device for outputting a laser beam toward the surface of an object to treat said surface includes, e.g., a housing, a beam shaper that is accommodated within the housing and is supported by the housing so as to be capable of rotating or moving in a reciprocal manner, an optical component that is fixed to the housing, and an operation mechanism for rotating or reciprocally moving the beam shaper. The laser beam that is introduced into the housing and passes through the optical component and the beam shaper is outputted, and a spot of the outputted laser beam is capable of rotating or reciprocally moving on the surface. The beam shaper may be a diffractive optical element.

The application discloses a kind of nonlinear characteristic measuring device and test method suitable for thick sample, by light power density equivalence method, the light power density required for exciting thin sample nonlinear characteristics by small power laser beam is equivalent with the light power density required for exciting thick sample nonlinear characteristics by high power laser beam, to realize the purpose of thick sample nonlinear characteristics, such as nonlinear absorption coefficient and nonlinear refractive index measurement.The application adopts long focal length lens focusing, which not only meets the establishment condition of Z scanning and I scanning theory, but also can realize the complement of complete nonlinear characteristic curve.The application is composed of six parts, including laser output unit, energy attenuation unit, beam shaping unit, sample displacement unit, energy detection unit and computing processing unit, which can realize the nonlinear characteristic measurement of optical material with larger thickness range in wide waveband (such as 315nm-11μm), greatly enriching and facilitating the research in the field of material nonlinear.