454 results about "Beam shape" 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.

An aluminum mullion and method for creation by an extrusion and castellation process for use in a construction section. The aluminum mullion may comprise a first end, a second end having a guide track; a height, and a mullion body positioned between the first end and the second end. The aluminum mullion may be extruded by pushing semi-molten aluminum through a steel die under high pressure to create a monolithic beam shape and then at least one portion of the mullion body is removed by the castellation process. Multiple portions of the mullion body may be removed along the height of the mullion as needed for construction requirements.

The invention relates to the technical field of quantum sensing and ocean detection, and discloses an ocean magnetic field sensor based on an NV color center and an ocean magnetic field measuring method.The sensor comprises a cylindrical pressure-resistant cabin, an optical platform arranged in the pressure-resistant cabin and a main control panel; a laser, a beam shaping unit, a dichroscope, a beam shaping lens group, an objective lens, a diamond NV color center chip, a plano-convex lens I, a band-pass filter and a photoelectric detector are mounted on the optical platform; two microstrip loop antennas are mounted on the outer side of the diamond NV color center chip; an FPGA + ARM dual-core processor, a digital lock-in amplifier and two microwave signal generators are installed on the main control board, and the microwave signal generators are connected with the microstrip loop antenna and achieve electromagnetic coupling with the diamond NV color center chip. The invention has the advantages of high sensitivity, good long-term stability and strong anti-interference capability, and provides a new generation of quantum sensing solution for applications such as ocean geomagnetic monitoring and underwater target identification.

The invention provides a directional network adaptive radiation control method and system, and relates to the technical field of wireless network control, and the method comprises the steps: obtaining real-time high-frequency motion data, relative distance data and environment interference intensity data of a wireless network; motion state continuous quantization is carried out according to the real-time high-frequency motion data, and motion characteristic quantities are constructed and obtained; performing multi-step track prediction processing according to the motion characteristic quantity, and outputting a track prediction sequence; performing prediction reliability evaluation according to the trajectory prediction sequence, and generating a trajectory uncertainty index; generating a radiation control signal according to the motion characteristic quantity and the trajectory uncertainty index to obtain the radiation control signal; and performing beam forming and power adaptive processing according to the radiation control signal and the real-time relative distance data to obtain a final beam form and power parameter combination. According to the method, the communication quality and the anti-interference capability of the directional network in a complex environment are remarkably improved.

The invention relates to the technical field of radiation therapy, in particular to a boron neutron capture therapy beam shaping device and a boron neutron capture therapy system. The beam shaping device for boron neutron capture therapy is used for beam shaping of a DT neutron tube generator. The interior of the beam shaping device is provided with a particle beam channel, and the particle beam channel is used for generating an initial neutron source through an incident proton beam. The beam shaping device comprises a value-added layer, a moderator, a filter layer, a reflecting layer, a collimator and a shielding layer, wherein the value-added layer, the moderator, the filter layer and the collimator are sequentially arranged from a target material to an outlet. And the axes of the particle beam channel, the value-added layer, the moderator and the collimator coincide. According to the beam shaping device, 14Mev high-energy neutrons from the DT neutron tube generator are shaped into hot / slow neutron beams meeting the BNCT treatment requirements, and impurities of fast neutrons and gamma rays are reduced to the maximum extent, so that the dosage precision and biological selectivity of treatment are effectively improved.

A battery assembly for an electric vehicle includes two spaced-apart longitudinal profiles extending in a length direction L, interconnected to a front and a rear transverse beam. At least three beam shaped battery modules are interconnected along their longitudinal sides via a plate-shaped interconnecting member, and extend in the length direction, to be attached to an inner surface of the front transverse beam via a bracket. Each battery module is provided with cooling channels extending in the length direction L and having an inlet situated between a transverse end face of the module and the inner surface of the front transverse beam. A water inlet duct extends from an external side the front transverse beam in a central area situated between the brackets, for connecting to a coolant inlet of the central battery module.

The invention relates to the technical field of wireless communication, and provides a vehicle-mounted satellite phased-array antenna and a beam forming method thereof, and the phased-array antenna comprises a plurality of antenna units and T / R assemblies which are correspondingly connected. The feed network is used for distributing signals from the beam forming network to each T / R component; and the beam forming network is used for calculating and distributing a phase to each T / R component, and adopting an adaptive beam forming algorithm to control the direction of a beam by adjusting the phase, so that the beam points to a required satellite or other targets. The phased-array antenna can form a plurality of transmitting wave beams and receiving wave beams with different directions through wave beam conversion in a repetition period, has rapid scanning agility capability, can change an antenna pattern function or an antenna wave beam shape through adjusting signal amplitude and phase in each unit channel in the phased-array array, and improves the antenna performance. The reliability is improved by omitting a mechanical driving system, and even if some nodes are damaged, the use of the whole function is not affected.

The invention relates to the technical field of laser precision machining, and discloses a laser precision machining device and method for dynamically adjusting beam shaping based on light field imaging, and the device comprises a laser emission unit, an X-axis movable laser reflector, an X-axis and Y-axis movable laser reflector, a dynamic shaping module and a focusing galvanometer system. The laser emitting unit, the X-axis movable laser reflecting mirror, the X-axis and Y-axis movable laser reflecting mirror, the dynamic shaping module and the focusing galvanometer system are all fixed to a support at the top of the supporting table. According to the invention, based on a specially designed laser, laser beam phase space distribution is adjusted by using a variable optical path to realize beam shaping, a laser beam can be changed into a rectangular flat-topped light spot, and the size of the rectangular light spot is adjusted through the size of the optical path. And the focal length of the laser beam and the size of the flat-topped light spot can be dynamically adjusted, and uniform machining on microelectronic device packaging, wafer surfaces and optical element surfaces is achieved.

The invention provides a construction method for installing a large-span special-shaped beam curved template system, and belongs to the technical field of building construction. According to the construction method, accurate three-dimensional modeling is conducted on the shape of a special-shaped beam through a special-shaped curved surface parametric modeling algorithm, and material prefabrication is guided; eight oscillation excitation devices and twelve vibration monitoring devices are optimally arranged by using experimental design and a graph theory analysis method to form a dynamic monitoring network, vibration response data are analyzed in real time by using a wavelet transform monitoring algorithm, and the energy ratio of each frequency band is calculated as a quality evaluation index. A game optimization model is established, and according to different ranges of energy ratios, the support spacing is automatically adjusted, a back ridge fixing mode is combined or a supporting system is reinstalled, so that a comprehensive quality assurance system of accurate geometric modeling-dynamic state monitoring-intelligent parameter adjustment is constructed. The technical problem that the installation quality of a large-span special-shaped beam curved template system is difficult to guarantee is solved.

The invention relates to a method for measuring the coherence length of a Shell model correlation structure light beam, which belongs to the field of laser space coherence measurement, and comprises the following steps: S1, calculating the coherence lengths # imgabs0 # and # imgabs1 # in x and y directions by using the analytic relationship between the coherence length of the Shell model correlation structure light beam and the spatial coherence modulus; s2, a double-aperture mask is arranged on a light beam shaping transmission path of the laser processing system, the aperture positions are symmetrical, the distance d is adjustable, and after light beams are focused, intensity signals # imgabs2 are collected at a focal plane detector; and S3, extracting an intensity signal # imgabs3 # to obtain a double-aperture interferogram, performing Fourier transform on the interferogram, establishing a corresponding relation between a low-frequency component in a frequency spectrum and a characteristic frequency of an aperture spacing d, and calculating to obtain a spatial coherence modulus # imgabs4 #. According to the invention, based on partially coherent light dual-aperture interference and Fourier spectrum analysis, a direct analytical relationship between the spatial coherence degree and the coherence length is established, and a new way is provided for beam quality control in laser processing.

The invention discloses a single-photon streak tube laser radar based on a delay difference. The single-photon streak tube laser radar comprises a delay pulse generator, a laser, a delay difference generation module, a beam shaping system and a receiving system. Wherein the delay difference generation module comprises an optical delay path and a time delay path, and can dynamically adjust the delay difference to adapt to near-field high-precision and far-field wide-range detection requirements; the light beam shaping system shapes the laser into a one-dimensional fan-shaped light beam, so that the divergence direction of the one-dimensional fan-shaped light beam is aligned with the time deflection dimension of the streak tube detector, and the energy utilization rate and the streak image quality are improved; the receiving system rejects noise and solves a target distance by using a cross-correlation noise reduction and weighted fusion algorithm through multi-stripe redundancy processing, so that the single-photon detection efficiency and the anti-interference capability are remarkably improved. According to the invention, the detection capability of the system on a long-distance weak reflection target, the reliability in a complex environment and the three-dimensional imaging precision are effectively improved.

The utility model belongs to the field of laser application, and relates to beam shaping of a laser, in particular to a small-divergence-angle laser based on a beam shaping technology. The problems that in the prior art for laser diode collimation, astigmatism of the diode cannot be calibrated through single-lens collimation, and cost is increased due to the fact that fast axis collimation and slow axis collimation need to customize a fast axis collimating lens with a proper focal length are solved. The utility model discloses a small-divergence-angle laser based on a beam shaping technology. A first collimating lens, a fast-axis beam shrinking device and a beam expander are sequentially arranged on an emergent light path of a first laser diode; the light emitting point of the first laser diode is located at the focal point of the first collimating lens, the fast axis beam shrinking device comprises a first cylindrical lens and a second cylindrical lens, and the focal points of the first cylindrical lens and the second cylindrical lens coincide. According to the utility model, the divergence angle of the laser diode is reduced to 0.1 mrad, so that the diameter of a light spot at 500m is less than 100mm, and the actual light spot observed in an experiment is 80mm.

The invention relates to a measuring arrangement for the interferometric determination of the surface shape of a test object, wherein a test wave generated from electromagnetic radiation and reflected at the test object can be superimposed with a reference wave not reflected at the test object, with a reference element (110, 210, 310, 410) having a reference surface (112, 212, 312, 412) which, in the optical beam path, splits off the reference wave from the test wave before it strikes the test object (120, 220, 320, 420) by reflection, and at least one beam shaping surface (111, 211, 311, 411, 413, 414) located in the optical beam path in front of the reference surface, wherein this beam shaping surface is designed as an aspherical distortion correction surface such that a distortion occurring in a predetermined reference plane of the measuring arrangement is reduced. The invention further relates to a method for manufacturing an optical element for such a measuring arrangement.

The invention belongs to the technical field of laser, and particularly discloses a beam shaping system and method based on prism pair orthogonality and cascade, and the system comprises a single-mode fiber, an aspherical lens, a first prism pair, a first parallel plate, a second prism pair and a second parallel plate which are sequentially arranged along the direction of an optical axis. A Gaussian beam emitted by a single-mode optical fiber is collimated by an aspherical lens to form a parallel beam, the beam is expanded or compressed in the X direction by a first prism pair, the beam is expanded in the Y direction by a second prism pair, and two inclined parallel plates are respectively used for compensating the beam offset in the X / Y direction; according to the invention, the circular Gaussian beam emitted by the single-mode fiber can be shaped, a large strip-shaped collimation light spot with an adjustable length-width ratio from 4: 1 to 20: 1 and a long axis size of 30mm can be realized, and the central positions of the input and output beams in the cross section are ensured to be unchanged.

The invention provides a method for processing a micropore by combining vortex beam shaping femtosecond laser with nanosecond laser, which comprises the following steps of: firstly, taking charge of melting and sublimation of a material by utilizing the high-power characteristic of the nanosecond laser, and then taking charge of finish machining of the hole wall of the processed micropore by utilizing the characteristics of small heat affected zone and high peak energy of the femtosecond laser. Therefore, the problems that the heat affected zone of the hole wall of the micropore machined by nanosecond laser is large, and the machining quality of the hole wall is poor due to material melting and recasting are solved. Therefore, the advantages of high efficiency of nanosecond laser micropore processing, small thermal damage area of femtosecond laser material processing and high micropore pattern quality of the processed micropore are combined, coarse and fine synchronous processing is finally realized, and the processing quality of the micropore wall is improved.

The invention discloses a miniaturized high-efficiency frequency-stabilized 355nm ultraviolet pulse laser, and belongs to the technical field of lasers. Comprising a seed laser module, a laser frequency stabilization module, a laser amplification module, a beam shaping module and a frequency tripling module. After frequency stabilization control is carried out on seed laser, a large-energy pumping source is generated through laser amplification, flat-topped light beams are formed after the light beams pass through a light beam shaping module, and high-efficiency 355 nm ultraviolet pulse laser output is achieved in combination with a nonlinear crystal frequency conversion technology. The device has the advantages of miniaturization, high conversion efficiency, high frequency stability, strong anti-interference capability and the like, can be used for an atmospheric component detection laser radar light source, and can meet the application requirements of airborne, satellite-borne and other complex environments.

The invention relates to an LD area array beam shaping and homogenizing system based on a microlens array and a use method thereof. The system comprises an LD area array light source, a fast axis pre-correction unit, a two-dimensional shaping and homogenizing unit, a relay lens group and an output coupling unit which are sequentially arranged along a light path, the fast axis pre-correction unit is a single-row micro-cylindrical lens array composed of a plurality of micro-cylindrical lenses; the two-dimensional shaping and homogenizing unit comprises a first microlens array and a second microlens array which are sequentially arranged along the optical axis, and the first microlens array and the second microlens array are both positive spherical microlens arrays arranged in an N * N matrix. According to the LD area array light beam shaping and homogenizing system, light beam segmentation and superposition are achieved, eventually homogenization of output light spots is achieved, and the light spot uniformity reaches 90% or above.

Disclosed are techniques for wireless communication. In an aspect, a positioning entity receives a beam report from a network entity, the beam report including beam shape assistance information for one or more downlink transmit beams of a base station, the one or more downlink transmit beams corresponding to positioning reference signal resources to be measured by a user equipment (UE), the beam shape assistance information indicating at least one basis function representing a beam shape of each of the one or more downlink transmit beams or a quantization of a reduced portion of each of the one or more downlink transmit beams, and determines a location of the UE based at least on signal strength measurements of the positioning reference signal resources and the beam shape assistance information.

The invention discloses an underwater high-repetition-frequency pulse laser line scanning imaging system and method, and relates to the technical field of underwater laser imaging, a laser emission module is used for emitting high-repetition-frequency pulse laser and comprises a high-repetition-frequency pulse laser device with the working wavelength of 532 nm and a beam shaping module; wherein the light beam shaping module is composed of a double-axis cone mirror and a cylindrical mirror; the laser imaging module is used for carrying out large-depth-of-field imaging on target reflection echoes in a set time window, comprises a high-speed gating camera, an imaging lens and a narrow-band optical filter, and is constructed based on the Sammer imaging principle; and the synchronous control module is used for performing power supply communication and gating time sequence control to realize time sequence synchronization of the laser and the camera in the system. According to the invention, laser line scanning and range gating imaging technologies are combined, so that the method is suitable for long-distance and large-range environment detection, high-precision three-dimensional reconstruction of a short-distance target can be realized, and the definition, the signal-to-noise ratio and the applicability of underwater imaging are effectively improved.

The invention relates to the technical field of laser drilling, in particular to a multiband laser time-sharing machining system for a large-length-diameter-ratio deep hole in a superhard and brittle material, which comprises a shell, and a picosecond laser, a femtosecond laser, two field lenses, a dichroic mirror, a beam shaping device and a laser head which are arranged in the shell, and a heat dissipation device is arranged at the bottom end of the beam shaping device in the shell. A multi-stage chip removal device is installed at the end of the laser head, and the picosecond laser and the femtosecond laser are combined through a dichroic mirror and share the same light beam shaping device. The femtosecond laser device and the picosecond laser device are integrated, lasers of different wave bands are emitted in a time-sharing mode, and efficient and high-precision machining of the large-length-diameter-ratio deep hole of the super-hard and brittle material is achieved. Meanwhile, the multi-stage chip removal device cleans fines generated by machining in time in an air blowing and negative pressure suction mode, and the machining quality is guaranteed.

The invention discloses an antenna based on phase-only non-uniform time modulation, which comprises a shaped reflector antenna and a phase-only non-uniform time modulation array feed source, the shaped reflector antenna is used for forming cosecant square beams on a pitching surface, and the phase-only non-uniform time modulation array feed source is formed by a plurality of antenna unit arrays. Each antenna unit is cascaded with a time modulation module, and the phase-only non-uniform time modulation array feed source controls each antenna unit through a phase modulation waveform. According to the invention, a phase-only non-uniform time modulation array antenna is used as a feed source to irradiate and form a reflector antenna, and a cosecant square beam is formed on a pitching surface by using the beam forming capability of the reflector antenna, so that the cosecant square beam is formed on the pitching surface at extremely low cost; a phase-only non-uniform time modulation array feed source is utilized to realize low-sidelobe, high-precision and wide-angle scanning of a fundamental wave beam on an azimuth plane, so that two-dimensional high-gain wide-airspace beam coverage is realized.

An optical pattern projection device includes a light emitter or array of light emitters and one or more planar optics layers configured to project and separate a light beam from the light emitter to generate a projected light pattern, the projected light pattern comprising a plurality of sub-patterns, each sub-pattern corresponds to one of the light emitters. The planar optic layer may include a single optical metasurface with superimposed beam shaping and / or projected phase profiles and beam splitting phase profiles. Alternatively, the planar optic layer may include two optical metasurfaces each containing a light shaping and / or projected phase profile, which together produce a linear relationship between the emitter position and the corresponding beam projection angle, and one or both of the metasurfaces further containing a superimposed beam separation phase profile. The light shaping and / or projected phase profile may have similar functionality as the microlens array. A structured light camera combining optical pattern projection and detection is also provided.

The invention relates to the technical field of lasers, and provides a double-gain-medium Q-switched laser and a constant-power pulse width adjusting method.The laser comprises a first pumping source, a second pumping source, an optical fiber beam combiner, a beam shaping system and a laser resonant cavity, the laser resonant cavity comprises a reflecting mirror, a first gain medium, a second gain medium, a polarization selector, a quarter-wave plate, a Q switch and an output mirror which are arranged in sequence; the first gain medium is used for absorbing first pumping light, the second gain medium is used for absorbing second pumping light, and the pumping power of the first pumping source and the pumping power of the second pumping source can be independently controlled. By changing the pumping power of the two pumping sources, real-time adjustment of the pulse width of the laser under the constant output power is achieved, the structure is compact, and control is easy and convenient.

A programmable 3D light beam shaping device based on the beamlet printing technology comprises a laser source, the laser source emits initial laser, the polarization state of the initial laser is adjusted through a rotatable half-wave plate, and then the initial laser is separated into an s component light beam and a p component light beam through a first polarization splitting prism, the p-component light beam enters a Dammann grating after being expanded, and a diffracted light beam containing a plurality of diffraction orders is generated; the diffracted light beam sequentially passes through a second polarization splitting prism, a quarter-wave plate and a first focusing element and is introduced into focal shift by a multi-stage phase plate array, and the spatial light modulator is used for adjusting the angle and position offset of subgroups of the light beam of the sub-beam array to generate a working light beam; the working light beam returns to the second polarization splitting prism through the original light path and enters the working area through the second focusing element, and a three-dimensional light field is generated; according to the device, the three-dimensional irradiance distribution in a machining area can be accurately controlled, so that multi-layer and depth-adjustable energy deposition is realized, and the machining quality, efficiency and consistency are remarkably improved.

A high-energy ion implantation system has an ion source and mass analyzer to form and analyze an ion beam along a beam path. A first RF LINAC accelerates the ion beam to a first accelerator exit, and a second RF LINAC accelerates the ion beam to a second accelerator exit along the beam path. A first magnet between the first and second RF LINACs alters the beam path along a first plane. A third RF LINAC accelerates the ion beam, and a second magnet between the second and third RF LINACs alters the beam path along a second plane. A beam shaping apparatus defines a shape of the ion beam, and a third magnet between the third RF LINAC beam shaping apparatus alters the beam path along a third plane, where the first, second, and third planes are not coplanar.

A laser beam shaping optical component 10 comprising an array of beam shaping optical elements, each element having an off-centre apex on a surface thereof. The element surfaces may be profiled upon t

The application discloses a variable-beam control method of a variable capacitance diode-based element grating leaky-wave antenna, and comprises the following steps: S1, researching and analyzing an ultra-grating beam conversion mechanism; researching the mechanism of a planar ultra-grating under anisotropic, uniform and continuous periodic boundary conditions; S2, according to the ultra-grating, researching a transmission mode and optimization design of a Floquet-Bloch theorem; researching an FB mode, and eliminating the bad FB mode by designing a tool for ultra-grating parameters; S3, analyzing and designing the ultra-grating leaky-wave antenna; researching the analytical field and current of the synthesized ultra-grating in the framework of the leaky-wave antenna, so as to customize the performance of phase, beam shape and polarization; S4, designing and analyzing an electrically-tuned beam control ultra-grating leaky-wave antenna; the application adopts the variable-beam control method of the variable capacitance diode-based element grating leaky-wave antenna, adopts a simple structure of a tunable material to tune an efficient structure platform, and lays a road for a new generation of efficient special gratings.

The application discloses a three-piece Bessel beam shaping system with a diffraction ring, and belongs to the technical field of laser processing, comprising: a beam shaping mirror, a first collimating mirror and a focusing mirror; the incident surface and the exit surface of the beam shaping mirror are annular planes and annular aspheric surfaces respectively, and are used for shaping a collimated Gaussian beam into a point annular beam with energy gradually decreasing from inside to outside; the incident surface and the exit surface of the first collimating mirror are annular aspheric surfaces and annular planes respectively, and are used for collimating the point annular beam; the incident surface of the focusing mirror is a combination of an axicon surface and a spherical surface, and the exit surface is a plane; the focusing mirror is used for focusing the collimated point annular beam into a Bessel beam with a diffraction ring. The application can significantly improve the focal depth of the Bessel beam in laser processing, and can also effectively remove processing materials such as ink. In addition, the focal depth of the Bessel beam in the application is adjustable, and the adjustment mode is more, the flexibility is higher, and is suitable for different laser processing scenes.