1383 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 present invention discloses a laser metal curved surface automatic focus processing system and method thereof, including: a multimodal data fusion device, a curved surface detection module with a secondary tracking structure, integrated 3D structured light vision and vibration sensing equipment; a dynamic focus correction module, configured with an adaptive energy control unit and a beam shaping component; a nonlinear motion control console, including a six-degree-of-freedom parallel mechanism motion platform, and its servo control system integrates a time-space phase compensation algorithm; a core control unit, the core control unit has an embedded fusion algorithm model, and establishes a nonlinear mapping between material removal efficiency η and multivariable dynamic parameters. The processing quality level of the present invention is improved through the multi-source data fusion of 3D structured light and vibration sensing, the curvature recognition accuracy is improved, and the focus offset is reduced in combination with the axial vibration compensation mechanism, thereby effectively improving the processing quality.

The invention discloses a laser processing device, a silicon carbide crystal ingot cutting method and a laser processing system. The laser processing device comprises a laser used for emitting Gaussian beams with preset laser parameters; the beam shaping element is used for shaping the Gaussian beam into a linear beam; and the scanning mechanism is used for focusing the linear light beam and cutting the silicon carbide crystal ingot by utilizing the focused linear light beam according to a preset cutting path and a preset cutting speed. Compared with the focused Gaussian beam, the focused linear beam has a small spot size in the direction of the optical axis, which means that the action depth of the focused linear beam in the silicon carbide crystal ingot is shallower, so that the length of the growth area of the microcracks generated in the direction of the optical axis in the machining process is reduced, and the machining precision is improved. And therefore, the roughness generated on the surface of the silicon carbide wafer is reduced, and the quality of the silicon carbide wafer is improved.

The invention discloses a rapid polarized light acoustic imaging device which comprises an excitation source, a light beam shaping module, a rapid polarization modulation module, an energy feedback module, a rapid scanning module and an acquisition processing module. And receiving photoacoustic signals corresponding to the exciting light in four different polarization states for calculation, and extracting anisotropy information of the sample. Compared with multiple times of scanning a sample or modulating the polarization state by rotating a half-wave plate, the problems of dislocation of multiple times of polarization acquisition points and false positive calculation are avoided, meanwhile, the time interval generated by continuously modulating the laser pulses is short, and energy fluctuation among the four pulses and errors caused by fluctuation are reduced. According to the invention, the limitation of the precision and speed of polarized light acoustic microscopic imaging is overcome, the microstructure characteristics in the target sample can be rapidly, accurately and highly sensitively detected, and the method has great application prospects in biomedical imaging and high-precision material detection.

The invention discloses a large-size wafer thinning and polishing device and method based on a dynamic line beam, and the device comprises a dynamic beam generation module, a rotary bearing module and a closed-loop control module, and the dynamic beam generation module comprises a laser, a polaroid, a line beam shaping assembly, a reflector, a hollow conical lens and a lifting module. The linear beam shaping assembly is used for shaping a laser beam into a line-shaped linear beam, the hollow conical lens is a hollow conical lens with an open end face and is used for shaping the line-shaped linear beam into an arc-shaped linear beam, and the hollow conical lens is installed on the lifting module to generate a dynamic arc-shaped linear beam; the rotary bearing module is used for fixing and driving a wafer to rotate; and the closed-loop control module is used for controlling the lifting of the lifting module and the movement of the rotary bearing module. The polishing speed can be greatly increased, the polishing uniformity and the polishing quality are also improved, a plurality of wafers can be thinned and polished at the same time, and the polishing device can adapt to wafers of different sizes and shapes.

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 discloses a wavelength-adjustable high-power picosecond all-solid-state laser. The microchip seed source adopts a passive Q-switching principle, can directly generate laser with the pulse width as narrow as 300ps, is high in seed laser efficiency, good in beam quality and large in energy, can synchronously output TTL (transistor-transistor logic) level, and is used for controlling the pulse duration and delay of a 808nm QCW pumping source; the optical isolator protects the front-stage microchip solid laser from being damaged by returned light of the rear-stage amplifier; the single-rod two-way end pump amplifier amplifies laser pulse energy output by the microchip solid laser; the light beam shaper comprises a Galileo laser beam shrinking system and a soft edge diaphragm and is used for shaping light beams; the single-rod one-way end pump amplifier amplifies the pulse energy of the preceding-stage laser; and the frequency multiplier performs frequency conversion on the output laser, and outputs wavelength-adjustable picosecond laser with millifocus magnitude, high power and high beam quality.

This disclosure relates generally to a composite reconfigurable intelligent surface system for real time beam steering and method thereof. Conventional method for real time beam steering includes bulky systems with several antenna elements and amplifiers to shape and control the beam. The present disclosure provides a composite reconfigurable intelligent surface (CRIS) for real time beam steering. The CRIS is formed from a set of constituent reflecting surfaces which in turn are generated from unit cells. These unit cells are responsible for providing individual phase reflection performance utilizing the installed varactor diode in each unit cell. The CRIS can provide a) multi-beam reflection performance, b) polarization sensitive operation, c) 2D beam steering abilities, d) real-time beam control, e) null point reduction for beam shaping requirements and f) dependable pattern stability over a suitable range of frequencies.

The invention discloses a walk-off compensation device for laser frequency tripling, and relates to the technical field of laser, and the device comprises a fundamental frequency light source which is used for generating fundamental frequency laser; the frequency doubling unit is used for converting the fundamental frequency laser into frequency doubling laser; the frequency tripling unit comprises a frequency tripling nonlinear crystal and is used for converting the frequency-doubled laser and the residual fundamental frequency laser into frequency tripled laser; the walk-off pre-compensation unit is arranged between the frequency doubling unit and the frequency tripling unit, the walk-off pre-compensation unit comprises a spherical lens which is eccentrically arranged, the spherical lens is used for enabling the frequency doubling laser and the residual fundamental frequency laser which is not completely converted to generate a preset included angle, and the preset included angle is matched with a walk-off angle generated in the frequency tripling nonlinear crystal; and the light beam shaping unit is used for outputting ultraviolet laser. According to the invention, a complex pre-compensation optical element does not need to be added in front of the frequency tripling unit, walk-off compensation can be realized only through the eccentrically placed spherical lens, and the structure of the optical system is greatly simplified.

The invention relates to the technical field of head-up display, in particular to an HUD optical aberration correction method, system and device and a vehicle. The correction method comprises the following steps: generating a light beam through an LED light source or a laser light source, and adjusting the brightness and color parameters of the LED light source or the laser light source through a control circuit so as to adapt to different display requirements and environmental conditions; and the light beam is preliminarily shaped and collimated by the light beam shaping element until a proper divergence angle and a proper light spot size are met so as to meet the requirements of a coupling element. According to the invention, the light beam emitted by the light machine is subjected to one-dimensional or two-dimensional pupil expansion through the optical waveguide, and then view field expansion and aberration correction are carried out through the free-form surface mirror, so that the problems of large size, limited view field angle, small eye box range and insufficient imaging definition in the prior art are effectively solved.

The utility model provides a multi-single-tube semiconductor laser diode densely-arranged beam shaping and coupling device, comprising a semiconductor array laser used for emitting a first beam array and carrying out fast and slow axis collimation to obtain a second beam array; the light beam reflection separation system is used for performing separation arrangement on the second light beam array; the fast and slow axis conversion system is arranged on a light path where the light beam is emitted by the light beam reflection separation system and used for rotating the fast and slow axis of the second light beam array which is separated and arranged by 90 degrees; the confocal beam shrinking and expanding system is used for simultaneously focusing the fast axis light spots and the slow axis light spots of the separated and arranged second light beam array and then carrying out fast axis beam shrinking and slow axis beam expanding to obtain a third light beam array; the light beam reflecting and combining system is arranged on the light beam emergent light path of the confocal beam shrinking and expanding system and is used for closely arranging the third light beam array; and the focusing system is arranged on a light path where the light beams are emitted by the light beam reflecting and combining system, and is used for focusing the light spots of the closely arranged third light beam array to a target size.

The invention belongs to the technical field of flow field optical measurement, and particularly relates to a high-enthalpy plasma gas temperature measurement method, system and device based on an absorption spectrum. Generating a composite modulation signal through a high-frequency sine wave and a low-frequency sawtooth wave, and enabling incident light to pass through a flow field measurement area in parallel through laser modulation and beam shaping; the detector receives the transmission light and converts the transmission light into an electric signal containing harmonic information, the signal acquisition device is used for performing signal acquisition, the phase-locked demodulation algorithm is used for extracting second harmonic, and the temperature is inversely deduced by combining the double-spectral-line temperature measurement method and the Fourier coefficient amplitude ratio of the second harmonic with the HITRAN database. The system comprises a signal driving module, a laser emission module, a detection acquisition module and a temperature measurement module. The device is composed of a signal generator, an in-phase adder and the like, and a laser is matched with a driving power supply to guarantee stable work. According to the scheme, aiming at the problems of weak signal absorption and insufficient signal-to-noise ratio under complex working conditions, the measurement accuracy and reliability are improved by composite modulation, harmonic extraction and a bispectral line algorithm, and an effective means is provided for research on thermal characteristics of the high-enthalpy plasma.

A laser system (10) for generating a linear laser marking (34) on a projection surface (33), including a laser beam source (11), which generates a laser beam (25) and emits it along a propagation direction (26), a first beam shaping optical unit (12) embodied as a collimation optical unit and having a first optical axis (13), and a conical mirror (14) which is embodied as a right cone having a cone axis (15) and a reflective lateral surface (22) and is arranged in the beam path of the laser beam downstream of the collimation optical unit (12), wherein the cone axis (15) is oriented parallel to the first optical axis (13). The laser system (10) includes a second beam shaping optical unit (16), which is arranged in the beam path of the laser beam upstream of the conical mirror (14) and reshapes the laser beam into a ring beam (28) having an intensity minimum in the center of the beam.

The invention discloses a fluorescent photoacoustic bimodal imaging device and method based on a single pixel. The method comprises the following steps: placing an object at the focal length position of an objective lens of an imaging unit; starting the laser, and adjusting the beam shaping unit to amplify the laser emitted by the laser to a required size; the structured light generation unit generates a binary black and white pattern based on the amplified laser beam to obtain structured light; the structured light irradiates an object, so that the object is excited to generate a fluorescence signal and a photoacoustic signal; and adopting a single-point detection method to collect the fluorescence signal and the photoacoustic signal, and performing image reconstruction through an inverse algorithm corresponding to the algorithm for generating the binary black and white pattern. According to the invention, photoacoustic-fluorescent bimodal imaging is realized based on a single-pixel technology, a single-pixel imaging technology route is used for replacing a traditional array imaging mode as a breakthrough, the problem of photoacoustic and fluorescent image fusion is solved from the imaging principle, and finally a time-space matched multi-modal image is obtained. Meanwhile, the system has the advantages of low cost, high imaging speed, no need of a complex optical system and the like.

The invention relates to the technical field of data processing, and discloses a BNCT digital twinborn model construction method, a BNCT digital twinborn model dynamic optimization method, BNCT digital twinborn model dynamic optimization equipment and a medium, and the construction method comprises the following steps: carrying out data assimilation processing on obtained multi-physical field simulation data to generate equivalent measured data matched with physical characteristics of historical measured data, generating a data assimilation training set based on the historical measured data and the equivalent measured data; wherein the multi-physical field simulation data represents simulation data of the accelerator and the beam shaping device in various physical processes; based on the data assimilation training set, a first sub-model used for representing the physical process of the accelerator and a second sub-model used for representing the neutron beam analysis process are obtained through training; and constructing the BNCT digital twinborn model according to the first sub-model and the second sub-model obtained by training. According to the technical scheme provided by the invention, the calculation precision and the processing complexity of the BNCT digital twin system can be improved, and real-time response is ensured.

The invention relates to the technical field of laser processing, particularly discloses an ultrathin prepreg single-emitting laser hole forming system, and aims to solve the contradiction among precision, thermal damage and efficiency in ultrathin prepreg laser processing. According to the system, through cooperation of an ultrashort pulse laser source, precise light beam shaping and transmission, material processing and positioning, real-time monitoring and feedback and an intelligent control and optimization module, laser and material interaction is finely regulated and controlled. In a single laser event or an equivalent single laser event, high-precision and low-damage microstructure processing of the ultrathin prepreg is realized, the defects of a heat affected zone, carbonization, layering and the like are effectively reduced, and the processing quality and efficiency are improved.

The invention relates to an aerosol single-droplet optical tweezers detection device and method based on an LED light source, belongs to the technical field of optical capture and particle detection, and solves the problems that a light source adopted by an existing optical tweezers technology is high in cost and large in energy consumption, and large spurious signal interference exists in signal detection. The optical coupling system comprises an LED light source module, a collimating lens, a light beam shaping assembly, a focusing lens assembly and a semi-transparent and semi-reflective mirror assembly which are arranged in sequence. The optical tweezers detection system comprises the light beam coupling system, a single liquid drop suspension system, a gas atmosphere control system, a micro-drop pumping system, a signal detection system and a micro-drop detection device.

A neutron capture therapy system includes a neutron generating device and a beam shaping assembly. The neutron capture therapy system further includes a concrete wall accommodating the neutron generating device and the beam shaping assembly and shielding radiations generated by the neutron generating device and the beam shaping assembly, the concrete wall and a reinforcing portion at least partially disposed in the concrete wall are provided to support the beam shaping assembly, and more than 90% of weight of a material of the reinforcing portion is composed of at least one element of C, H, O, N, Si, Al, Mg, Li, B, Mn, Cu, Zn, S, Ca, and Ti. In the neutron capture therapy system, the reinforcing portion disposed in the concrete wall has good anti-activation performance. Therefore, compared with a conventional reinforced concrete structure, the radiation is further attenuated.

The invention relates to a diffractive optical element beam shaping method based on spatial frequency filtering, and the method comprises the steps: obtaining an incident beam, and obtaining corresponding geometric analysis phase distribution based on a preset homogenized beam; the homogenized light beam is adjusted to be a rectangular flat-topped light beam, and phase correction processing is carried out on the obtained geometric analysis phase; the geometric analysis phase after phase correction is processed based on a spatial frequency filtering method, a processed light field regulation and control distribution requirement is obtained, and the processed light field regulation and control distribution requirement has phase and amplitude regulation and control requirements at the same time; and designing a diffractive optical element, so that the diffractive optical element meets the required light field regulation and distribution requirements, and shaping an incident light beam into the rectangular flat-topped light beam by using the diffractive optical element. According to the invention, the light beam homogenization effect with high uniformity, sharp edge and high diffraction efficiency can be realized, and wide application prospects are obtained in the aspects of laser welding, photoetching, biomedicine and the like.

The embodiment of the invention provides a light beam shaping assembly, a display device and a manufacturing method of the light beam shaping assembly, and relates to the technical field of light display, and the light beam shaping assembly is high in control precision of light beams. The beam shaping assembly comprises a first metasurface device and a second metasurface device, and the second metasurface device is arranged on the light emitting side of the first metasurface device; the first metasurface device comprises a first unit cell group and a second unit cell group; the second metasurface device comprises a third unit cell group and a fourth unit cell group; the first unit cell group is used for collimating the first light beam to form a first collimated light beam, and the third unit cell group is used for deflecting the first collimated light beam; the second unit cell group is used for collimating the second light beam to form a second collimated light beam, and the fourth unit cell group is used for deflecting the second collimated light beam.

This disclosure relates generally to a composite reconfigurable intelligent surface system for real time beam steering and method thereof. Conventional method for real time beam steering includes bulky systems with several antenna elements and amplifiers to shape and control the beam. The present disclosure provides a composite reconfigurable intelligent surface (CRIS) for real time beam steering. The CRIS is formed from a set of constituent reflecting surfaces which in turn are generated from unit cells. These unit cells are responsible for providing individual phase reflection performance utilizing the installed varactor diode in each unit cell. The CRIS can provide a) multi-beam reflection performance, b) polarization sensitive operation, c) 2D beam steering abilities, d) real-time beam control, e) null point reduction for beam shaping requirements and f) dependable pattern stability over a suitable range of frequencies.

The invention relates to the technical field of target distance detection and 3D scanning reconstruction, and discloses a coaxial scanning type ultra-long distance detection laser radar system, which comprises a laser light source module, which adopts a 1550nm optical fiber laser to output high-power laser, and ensures sufficient laser energy and human eye safety; according to the invention, by adopting the high-power 1550nm fiber laser, the ultra-long distance detection is realized on the premise of ensuring the safety of human eyes, and the detection range of more than 10km can be reached, so that the limitation that the detection distance of the traditional laser radar is only 500m is broken; according to the invention, by selecting the 1550nm laser device which is safer to human eyes and greatly improving the laser power to kilowatt and even myriawatt levels, stronger echo signals are realized, so that the detection signal-to-noise ratio is remarkably improved; the micro-lens array is adopted to replace a traditional DOE diffractive optical element, efficient beam shaping of a one-dimensional or two-dimensional dot matrix is achieved through flexible regulation and control of the curvature radius and the distance of the micro-lenses, meanwhile, the manufacturing cost is reduced, and the design freedom degree is expanded.

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.

The invention relates to the technical field of optical wireless communication, in particular to an optical wireless communication device and method based on beam shaping, and the device comprises a beam shaping module which comprises at least one beam shaping lens so as to convert a beam outputted by a point light source into a uniformly distributed linear or planar light field; the optical transceiver module comprises a plurality of optical base stations, the optical base stations are arranged in a redundant mode in the extension direction of the communication scene, each optical base station integrates at least one optical transmitter, an optical detector and a plurality of prisms and is used for transmitting and receiving optical signals, and the coverage range of the single optical base station is expanded through the prisms; and the dynamic demodulation module is connected with the optical detector, and dynamically adjusts the demodulation threshold value of the corresponding bit error rate according to the real-time channel state. Therefore, when the technology is applied to wireless optical communication, the communication performance can be improved, the coverage distance can be increased, the coverage uniformity can be improved, the bit error rate can be reduced, the construction cost can be reduced, and the long-term stable communication requirement of a closed scene can be met.

A system that uses a scalable array of individually controllable laser beams that are generated by a fiber array system to process materials into an object. The adaptive control of individual beams may include beam power, focal spot width, centroid position, scanning orientation, amplitude and frequency, piston phase and polarization states of individual beams. Laser beam arrays may be arranged in a two dimensional cluster and configured to provide a pre-defined spatiotemporal laser power density distribution, or may be arranged linearly and configured to provide oscillating focal spots along a wide processing line. These systems may also have a set of material sensors that gather information on a material and environment immediately before, during, and immediately after processing, or a set of thermal management modules that pre-heat and post-heat material to control thermal gradient, or both.

A low-beam headlight includes a light source arrangement for generating a light cone consisting of light that is less divergent in a first transverse direction than in a second transverse direction perpendicular to the first transverse direction. The low-beam headlight includes beamforming optics for generating, on the basis of light, a light / dark distribution comprising a light / dark edge extending obliquely at least in portions with respect to the first transverse direction and the second transverse direction, wherein the beamforming optics comprises a condenser lens array for receiving incident light, and a projection lens array with a multitude of projection lenses for outputting light received by the condenser lens array. Compared to a second projection lens assigned to a second condenser lens of the first column, a first projection lens assigned to a first condenser lens of the first column of the matrix is decentered differently with respect to the assigned condenser lens along the second transverse direction.

The invention belongs to the technical field of laser processing, and provides a powder laying layer thickness and beam shaping coordinated regulation and control system and method for laser additive manufacturing, and the system comprises a light source device which is used for emitting laser beams required by additive manufacturing; then, when the manufacturing and forming device determines the thickness of the powder laying layer needed by laying, the light source device uses a point light source and / or an annular light source to emit laser beams, and the spot diameter of the laser beams or the size of a molten pool formed by the laser beams is dynamically adjusted according to the thickness of the powder laying layer. The method has the beneficial effects that intelligent segmentation and process planning are conducted on all parts of the L-PBF forming component, the large-layer-thickness powder laying-large-size light source forming process and the small-layer-thickness powder laying-small-size light source forming process are adopted, and meanwhile the forming precision and efficiency of the component are considered.

A metalens used for beam shaping, beam-shaping system and the generating method of the metalens are provided by the present application. The metalens is used to shape an incident beam, and a divergence angle at least in one direction of an outgoing beam obtained by shaping is greater than the divergence angle in the same direction of the incident beam.

The invention belongs to the technical field of flatness detection equipment, and specifically relates to a glass flatness detection device and method, wherein the detection device comprises a working platform and a detection box; the detection box comprises a box body, a laser is vertically installed on the upper part of the box body, and a beam shaping system and a CCD camera are installed in the box body; a through hole is opened at the bottom of the detection box, and a standard glass and an inclination adjustment device are installed at the through hole, and the inclination adjustment device can adjust the inclination of the standard glass relative to the horizontal plane; compared with the prior art, the advantages and positive effects of the invention are: when the glass flatness detection device of the invention is used to check the level of the glass, the working platform is made level by adjusting the electric telescopic rod three, so that the influence of the horizontal deviation of the working platform on the detection accuracy can be avoided; when the spacing of the interference fringes needs to be adjusted, the piston rod of the electric telescopic rod one is controlled to extend or shorten; the interference fringes spacing changes, so as to adapt to different degrees of convex or concave defects.

The invention discloses a quantum magnetometer device based on a diamond nitrogen-vacancy color center. The quantum magnetometer device comprises a laser emission unit used for generating a 532nm laser beam based on a laser trigger signal; the beam shaping unit is used for focusing the laser beam to the diamond sample; the diamond sample comprises an NV color center array with specific depth on the surface or in the diamond sample, and electrons in NV color centers are excited based on laser beams to transition and generate fluorescence; the fluorescence collection unit is used for separating exciting light from 650-800nm fluorescence signals and converting the fluorescence signals into multi-channel electric signals; the microwave radiation unit is distributed around a diamond sample space and emits three independently regulated microwave frequencies at the same time; and the control and processing unit is used for receiving and processing the multi-channel electric signals in real time and analyzing magnetic field parameters based on the optical detection magnetic resonance spectral line. Synchronous measurement of a three-dimensional magnetic field is realized, and the limitation of single-axis measurement of a traditional NV magnetometer is broken through.