61 results about "Beam size" patented technology

An electron beam size measuring device (100) and measuring method. The electron beam size measuring device (100) comprises an electron beam source (110), an anode target (120), a driving device (140), and a detection device (130). The electron beam source (110) is used for emitting an electron beam. The anode target (120) comprises a bombardment surface (121) for receiving the electron beam, and the bombardment surface (121) comprises a first material surface (1211) and a second material surface (1212) arranged side by side. The driving device (140) is connected to the electron beam source (110) and / or the anode target (120) and is used for driving the electron beam source (110) and / or the anode target (120) to make relative movement, so that the electron beam scans the first material surface (1211) and the second material surface (1212). The detection device (130) is used for detecting a signal generated after the bombardment surface (121) is bombarded by the electron beam, and the signal is used for determining the size of the electron beam.

The embodiment of the invention provides a particle source assembly and particle beam equipment, relates to the technical field of charged particle beam processing and detection equipment, and is used for improving the degree of freedom of beam state adjustment of charged particle beams. The particle source assembly comprises a particle source, an adjustable diaphragm and a collimating lens device which are arranged along a first direction. Wherein the particle source is used for generating a charged particle beam which is emitted towards the adjustable diaphragm along a first direction; the adjustable diaphragm is positioned in a transmission path of the charged particle beam, and the size of a diaphragm hole is adjustable, so that the beam size of the charged particle beam is adjusted; the collimating lens device is used for collimating the charged particle beam emitted from the adjustable diaphragm, and the position of the collimating main plane in the first direction is adjustable. The particle source assembly can be applied to particle beam equipment.

A computer-implemented method for optimizing a video encoder. The method includes the step of defining a plurality of CUs of the video encoder that correspond to a plurality of stages. The plurality of stages includes at least a first stage, and a second stage immediately after the first stage. The method further includes the steps of providing a decision space of encoding parameters of the video encoder, and defining, for the second stage, a subspace being a subset of the decision space. The subspace contains b1 optimal decision paths from the first stage to the second stage, wherein b1 is defined as a beam size for the first stage. The b1 optimal decision paths are the b1 decision paths that have lowest accumulated cost among all decision paths from the first stage to the second stage.

The invention relates to an X-beam collimator for a crystal diffraction experiment. A main body of the X-beam collimator is of a stepped structure comprising an upper end thin part and a lower end thick part; the fixing hole is formed in the upper end thin part of the main body and is fixedly connected with an external driving motor to drive the main body to move; the loading hole is formed in the thick part of the lower end of the main body and is a cylindrical blind hole; the light beam control piece is of a cylindrical structure and is made of platinum iridium alloy, a small round hole is formed in the center of the light beam control piece, and the light beam control piece is installed in the loading hole in a matched mode. The light-transmitting hole is formed in the bottom of the loading hole, the axis of the light-transmitting hole is collinear with the light path axis of the coaxial microscope and the diffractometer, and the light-transmitting hole is used for allowing the X beams screened by the small hole to pass through. The fixing holes are fixedly connected with the motor, so that the motor can drive the main body to move; light beam control sheets with different light beam size control capabilities are loaded through the loading holes; the X-ray beam passes through the collimator through the light hole, the structure is simple, the size and the mass are small, and rapid collimation and size control of the X-ray beam can be achieved.

Devices, systems and methods related to all-reflective microscopes are described. The microscopes include an all-reflective off-axis optical system and is characterized with substantially zero chromatic aberration, low group delay dispersion and no central obscuration. One reflective microscope configuration includes a reflective objective subsection with at least three mirrors, where at least one mirror is off-axis and non-spherical. The reflective microscope also includes a reflective relay subsection with at least two minors having freeform surfaces and positioned to receive light from the reflective objective subsection. The reflective relay subsystem is configured to produce a magnification to allow coupling of light between two planes having differing beam sizes. The reflective microscope further includes an imaging subsection with at least one mirror having a freeform surface and positioned to receive light from the reflective relay subsection and to direct light received thereon in reflection in a direction of a sensor.

The invention discloses a vortex beam orbital angular momentum detection device and method based on a well-shaped line structure. The device sequentially comprises a well-shaped line structure and a focusing lens in the light path direction. A vortex light beam enters the well-shaped line structure to be diffracted, the focusing lens converges the vortex light beam to a focal plane, and a characteristic diffraction pattern related to a topological charge value is formed. The well-shaped line structure is composed of two groups of parallel line pairs which are mutually orthogonal, and the line width and the line spacing can be optimally designed according to the working wavelength and the light beam size. The core of the invention lies in that the well-shaped line structure is utilized to replace a traditional small-hole diaphragm, so that interfering secondary diffraction light spots in a far-field diffraction pattern are thoroughly eliminated, diffraction main light spots related to topological charges are clearly presented, and most (more than 64%) incident light energy is concentrated; and the availability and reliability of the method are improved to a great extent. The device is simple in structure and convenient to adjust, the reliable detection range of the orbital angular momentum is remarkably improved to 30 orders or above, and the device is particularly suitable for detection of weak-intensity vortex light beams and has great significance in promoting development of the free space optical communication technology.

The present application relates to the technical field of accelerator beam measurement, and particularly discloses a water gravity type inner target beam measurement device, which comprises a beam measurement assembly, a gravity adjustable cooling assembly, a lever balance assembly and a limiting piece, the beam measurement assembly is connected to one end of the lever balance assembly through the gravity adjustable cooling assembly, and the limiting piece is arranged on the side surface of the lever balance assembly. The device adopts a seesaw type structure, fully utilizes the installation space in the cyclotron shell, utilizes the gravity of the cooling liquid as the power of the seesaw type structure, can omit the arrangement of a complex power driving piece, is small in size, simple in structure, low in cost, good in cooling effect, and stable in the beam size of the inner target measurement piece during measurement.

The embodiment of the invention discloses a method and device for determining material consumption and waste output of a foundation pit supporting beam, and the method comprises the steps: opening or creating a three-dimensional building information model comprising a foundation pit model and a supporting member model in target building model software; obtaining three-dimensional model information, supporting beam related parameters, foundation pit elements and supporting component elements from the three-dimensional building information model, and determining a generation range of a foundation pit supporting beam; determining modeling positioning information of the supporting beams based on the generation range of the foundation pit supporting beams and the setting spacing of the supporting beams; generating a supporting beam model within the generation range of the foundation pit supporting beam based on the modeling positioning information of the supporting beam, the supporting beam size parameters and the supporting beam reinforcement information; and determining the concrete consumption, the steel bar quality and the waste generation amount based on the support beam model and the reinforcement information. According to the embodiment of the invention, the concrete consumption, the steel bar quality and the waste generation amount of the foundation pit supporting beam can be accurately determined.

This invention relates to a welding temperature gradient control method and apparatus based on neutron source residual stress detection, belonging to the field of welding control technology. This technology establishes a correlation between laser power, beam size, scanning rate, metal type, and temperature by constructing a temperature field data acquisition module and a heating and cooling module for the welding process, and by using laser-assisted local heating and forced substrate cooling devices. It develops a temperature gradient control method to achieve online physical simulation of the temperature gradient between the welding zone and the substrate, solving the problem of mismatch between the welding cooling rate and the neutron data acquisition rate, and realizing in-situ online testing of the stress field near welding conditions.

The invention relates to the field of atomic interference measurement, in particular to an atomic Raman interferometer based on a flat-topped beam. Comprising two Raman interference subsystems arranged in parallel, each of the two Raman interference subsystems comprises an ultrahigh vacuum cavity and a light path system, and the light path system comprises a flat-topped beam shaping module located on one side of the high vacuum cavity and a Raman light Doppler sensitive configuration module located on the other side of the high vacuum cavity; in the flat-topped beam shaping module, the holographic algorithm principle is adopted, the actual size of atoms in an interference area is combined to determine the size of a target flat-topped beam, the initial complex amplitude is precisely constrained, and a final diffraction phase is obtained through iterative optimization. After the Raman light passes through the diffraction phase, the Raman light is shaped into a flat-topped light beam with a target size and uniform intensity distribution at the ultrahigh vacuum cavity, so that the coherence efficiency under the same interference time is remarkably improved.

This invention discloses a device and method for real-time thermal focal length measurement of a long-pulse LDA side-pump module. The device includes a detector source, a beam expander system, an LDA side-pump module, a knife edge, an energy meter, and a signal generator. The detector source serves as the detection light source for thermal focal length measurement; the beam expander system serves as a beam expander for the detector source size; the LDA side-pump module serves as a heat source generator to achieve high peak power pump injection under long-pulse pumping; the knife edge is placed on both sides of the beam waist position after the detector source passes through the LDA side-pump module to cut the transverse and longitudinal beams, achieving beam size characterization; the energy meter is placed in the rear region of the measurement device to acquire the energy measurement of the detector source; and the signal generator serves as a timing control part to achieve timing synchronization between the detector source and the LDA side-pump module. This invention uses timing synchronization combined with Gaussian beam transmission transformation to obtain the thermal focal length value of the long-pulse LDA side-pump, which has the advantages of simple structure, ease of operation, and high measurement accuracy.

A vehicle lighting system comprising: a light source for generating illumination, a liquid lens optically aligned with the light source to receive the illumination and generate an output beam, and a controller configured to regulate the electrical power supplied to the liquid lens. The controller applies a first voltage to the liquid lens to generate a first output beam with a first beam size, and applies a second voltage to the liquid lens to generate a second output beam with a second beam size.

Beam monitors, methods of use and fabrication are provided herein. Beam monitors can include a rounded beam cavity with one or more waveguide connected thereto, from which a signal can be used to determine one or more beam characteristics. Such monitors can include a beam intensity monitor that includes a cylindrical beam cavity with a rectangular waveguide extending from a periphery, from which beam intensity can be determined. An advanced beam monitor can include a multi-moded beam cavity having multiple waveguides connected at distinct locations, each corresponding to a differing excitation mode. Such monitor can include an elliptical beam cavity and five waveguides connected thereto, signals from which can be used to determine beam charge, beam position and beam size in both the x-direction and y-directions. Beam monitors can be stand-alone devices or integrated within linear accelerators. Accelerators can include off-axis beam monitor coupling ports and on-axis tuning features.

The utility model provides a steel structure cantilever beam and concrete beam connecting structure which comprises a concrete secondary beam, a concrete boundary beam and a cantilever steel beam, the concrete boundary beam is higher than the concrete secondary beam, and the concrete boundary beam is connected with the cantilever steel beam through a steel rib beam with a variable cross section. The steel rib beam is pre-buried in the concrete secondary beam and the concrete boundary beam, the large-section area of the steel rib beam extends out of the concrete boundary beam, the length of the extending part is not larger than 1 m, and the section of the large-section area of the steel rib beam is the same as the size of the cantilever steel beam. The cantilever steel beam upper flange and the cantilever steel beam lower flange are respectively welded with the steel rib beam upper flange and the steel rib beam lower flange which extend out of the concrete boundary beam, and the cantilever steel beam web is connected with the steel rib beam web which extends out of the concrete boundary beam through a connecting plate and a bolt. According to the utility model, the span space of the overhanging design is expanded, and the comprehensive technical advantages of high construction quality, high speed, safety and reliability are achieved.

The invention discloses an electron beam deposition energy prediction method and system based on a convolution prediction model, and the method comprises the steps: S1, collecting two-dimensional plane deposition energy data of beam spots of various sizes through Monte Carlo simulation, carrying out the abnormal data recognition and abnormal data replacement, and obtaining the final two-dimensional plane deposition energy data; s2, obtaining a binarized graph function corresponding to each beam spot, and performing convolution with the binarized graph function corresponding to each beam spot by using a sedimentary energy density function to obtain a corresponding convolution prediction model; s3, fitting the deposition energy density function based on the final two-dimensional plane deposition energy data to obtain an optimal fitting value of each parameter; and S4, substituting the optimal fitting value of each parameter into the deposition energy convolution prediction model corresponding to the beam spot in any shape so as to realize deposition energy prediction of the beam spot in any shape. The method has the advantages of high prediction precision, small calculation amount and the like.

An optical path device, an optical detection method and a detection device, the optical path device comprising a side incidence optical path assembly and a lens assembly, the side incidence optical path assembly comprising a detection light source and an expander mirror set, the detection light source providing an incident light beam, the expander mirror set being configured to spread and shape the incident light beam in a first direction to form parallel first direction detection light beams and to spread and shape the incident light beam in a second direction to form non-parallel second direction detection light beams; the first direction detection light beams exiting the lens assembly to form a light spot on a surface to be detected of an object to be detected; the second direction detection light beams non-parallelly entering a surface of the lens assembly and having a beam size, the second direction detection light beams exiting the lens assembly to the surface to be detected and forming the light spot. The present application provides a detection optical path avoiding a central aperture of the lens assembly, which can effectively reduce the risk of lens damage and achieve more reliable and efficient wafer defect detection.

The application discloses a kind of keel beam design method and system of segmented hydroelasticity test model, belong to ship test technical field, wherein, the method includes: simulating the mass characteristics in each segment of the preset test segmented ship model using ordered discrete mass points;According to the ship model, the rectangular hollow section size of the continuous variable cross-section keel beam that simultaneously satisfies the similar vertical bending and horizontal bending inertia moment is determined;Using mass points and section size to establish the finite element connection model of keel beam and mass points;By opening several rectangular openings on the upper surface of keel beam to adjust the torsional stiffness of the whole ship model, then according to the modal analysis results of the finite element connection model, adjust the structure form of the upper surface of keel beam and the wall thickness of keel beam, to obtain the final keel beam size. The method standardizes the design of continuous variable cross-section keel beam that simultaneously satisfies the similar conditions of vertical bending, horizontal bending and torsion, so that the three-dimensional stiffness similar segmented hydroelasticity test model can be accurately and efficiently established based on the keel beam.

The utility model relates to the technical field of underwater straining beams, and discloses an underwater straining beam bracket device, which is characterized in that two groups of movable brackets are respectively distributed on two sides of a main body bracket, the movable brackets are transversely connected with the main body bracket in a sliding manner through sliding connecting pieces, a bracket is mounted at the bottom of the main body bracket, and the bracket is connected with the movable brackets through supporting components. Through the arrangement of the sliding connecting piece, the span of the whole device is changed by adjusting the sliding connecting piece and changing the distance between the movable bracket and the main bracket, the span is matched with the size of a beam to be supported on a pier, the beam with a large width is matched with an underwater straining beam bracket device with a large span, the supporting range is enlarged, and the supporting effect is improved. The stable supporting effect is improved, the beam with the small width is matched with the underwater straining beam bracket device with the small span, and space is saved; the underwater straining beam bracket device with the adjustable size can be suitable for various bridges with different spans, and the application range of the device is widened.

The embodiment of the invention discloses a dimming system for light spot adjustment and processing equipment. The dimming system comprises a light source module, a light spot adjusting module and a light spot adjusting module, the adjusting module is used for receiving the light beam and adjusting the light spot size of the light beam; the beam shrinking module is arranged between the light source module and the adjusting module according to the light beam propagation direction, and the beam shrinking module is used for compressing the light beam size of the light beam before the light beam enters the adjusting module. According to the system, on the premise that the maximum light spot size, uniformity and other indexes of an original optical system are kept unchanged, the light beam size of the light beams entering the adjusting module is reduced through the beam shrinking module, so that the change multiplying power of the light spots is increased, and it is guaranteed that the structural layout of the original system is not affected.

An illumination device includes an asymmetric laser light source, a beam adjustment module and an anisotropic diffusion module. The asymmetric laser light source is adapted to output an illumination light beam having different sizes in a first direction and a second direction that are interlaced with each other. The beam adjustment module is adapted to adjust a beam size of the illumination light beam. The anisotropic diffusion module is disposed between the asymmetric laser light source and the beam adjustment module. The anisotropic diffusion module has different optical properties along the first direction and the second direction, and the beam size of the illumination light beam is consistent in the first direction and the second direction.

The invention provides a lighting device. The lighting device comprises an asymmetric laser light source, a light beam adjusting module and an anisotropic homogenizing module. The asymmetric laser light source is used for outputting illumination light beams with different sizes in a first direction and a second direction which are staggered with each other. The light beam adjusting module is used for adjusting the light beam size of the illumination light beam. The non-isotropic homogenizing module is arranged between the asymmetric laser light source and the light beam adjusting module. The non-isotropic homogenization module has different optical characteristics along the first direction and the second direction, so that the beam size of the illumination beam is consistent in the first direction and the second direction.

The embodiment of the invention discloses a laser energy monitoring system and method. The system comprises a laser used for generating a laser beam containing an ultraviolet band and a visible band; the high-reflectivity mirror is used for receiving the laser beam, reflecting part of the ultraviolet band beam to an application end and transmitting the remaining ultraviolet band and visible band to form a remaining laser beam for energy monitoring; the light splitting element is used for carrying out dispersion light splitting on the residual laser beams, removing visible wave band light beams and leaving ultraviolet wave band light beams; the diaphragm is used for filtering stray light by limiting the aperture of an ultraviolet band light beam to ensure that the size and energy of the light beam entering a subsequent light path are stable; the scattering element is used for homogenizing the ultraviolet band light beam passing through the diaphragm through a scattering effect and converting coherent laser into a uniform area light source; and the photoelectric detector is used for receiving the homogenized ultraviolet light signal and converting the homogenized ultraviolet light signal into an electric signal so as to realize real-time monitoring of ultraviolet laser energy.

A laser processing device includes a beam generator configured to generate a laser beam, and a beam shaper configured to split the laser beam generated from the beam generator into a plurality of laser beams through diffraction and form a pattern of the laser beam based on a beam matrix, wherein the beam matrix includes beam patterns having a plurality of beam sizes.

The invention relates to the technical field of sonar signal processing, in particular to a smooth filtering method based on multi-beam narrowband warning line integration, which comprises the following steps of: (1) acquiring multi-beam narrowband data; (2) pre-processing the acquired multi-beam narrowband data, and supplementing a data value of a half-beam size before and after the data; (3) converting the multi-beam narrowband data into projection data through line integral transformation, and filtering the projection data in a projection domain; and (4) carrying out back projection on the filtered projection data to obtain reconstructed narrowband data, and carrying out linear integral smooth filtering on the multi-beam narrowband data to obtain a high-resolution space energy spectrum.

Beam monitors, methods of use and fabrication are provided herein. Beam monitors can include a rounded beam cavity with one or more waveguide connected thereto, from which a signal can be used to determine one or more beam characteristics. Such monitors can include a beam intensity monitor that includes a cylindrical beam cavity with a rectangular waveguide extending from a periphery, from which beam intensity can be determined. An advanced beam monitor can include a multi-moded beam cavity having multiple waveguides connected at distinct locations, each corresponding to a differing excitation mode. Such monitor can include an elliptical beam cavity and five waveguides connected thereto, signals from which can be used to determine beam charge, beam position and beam size in both the x-direction and y-directions. Beam monitors can be stand-alone devices or integrated within linear accelerators. Accelerators can include off-axis beam monitor coupling ports and on-axis tuning features.

The present application relates to the field of small and medium span bridge construction and control technology, especially to a prefabricated beam size matching method and system based on a three-dimensional laser scanner, by acquiring the point cloud data of the prefabricated beam, and preprocessing the point cloud data of the prefabricated beam, the preprocessed point cloud data of the prefabricated beam is matched with the BIM model, and the automatic detection of the structure size is realized; then by acquiring the interface corner points of the prefabricated beam, the adjacent prefabricated beam section corner points are aligned for virtual splicing, the on-site assembly process is simulated, the key construction details are acquired, accurate and reliable data support is provided for subsequent construction, and it is ensured that each beam section can meet the design specification when splicing, so as to reduce the safety hidden danger, improve the controllability and scientificity of the construction process, improve the construction efficiency, shorten the construction period, and increase the service life and structural reliability of the bridge structure. The problems of low prefabricated beam parameter detection efficiency, high operation difficulty and low accuracy in the prior art are solved.

The invention provides a multiband achromatic optical element and a design method thereof, the optical element is designed based on a liquid crystal material composed of a plurality of liquid crystal molecules, and the design method comprises the following steps: selecting the wavelengths lambda inc1, lambda inc2,..., lambda incn of input laser, the beam size of the input laser, and the optical parameter focal length of the optical element; calculating the phase distribution phi (x, y) of the optical element according to the selected wavelengths lambda inc1, lambda inc2,..., lambda incn, the beam size of the laser and the optical parameter focal length; determining orientation angle arrangement of the liquid crystal material according to the phase distribution phi (x, y) of the optical element; and determining the thickness of the liquid crystal material by using an electromagnetic simulation tool according to the selected wavelengths lambda inc1, lambda inc2,..., lambda incn. Aiming at the technical limitation of a traditional optical multi-optical element cascade achromatic scheme, the multi-band achromatic optical element is designed based on a liquid crystal material, so that the imaging quality of an optical system can be improved, the innovative application of the optical technology in more fields can be promoted, and the method has important scientific significance and practical application value.

This invention belongs to the field of MBE (molecular beam epitaxy) equipment, specifically a high-temperature beam source furnace beam control structure and its control method with an internal guide sleeve. The high-temperature beam source furnace beam control structure includes a control fork, a crucible plug support sleeve, a source furnace cavity, a source furnace crucible, a crucible plug, a high-temperature heating zone assembly, and an emission nozzle. The source furnace crucible body is fixed inside the source furnace cavity, and a controlled, movable crucible plug is located at its neck outlet position. Unlike existing structures, this invention uses a fixed source furnace crucible body and controls the movement of the crucible plug by the crucible plug support sleeve located in the high-temperature heating zone assembly to control and adjust the beam size and opening / closing during the operation of the high-temperature beam source furnace. This completely avoids the risk of breakage that occurs when moving large-capacity crucibles (over 500cc) with material in existing structures. While effectively improving the stability and adjustability of the source furnace beam, it also reduces the power requirements of the drive structure.

The present disclosure relates to a particle beam therapy system, an irradiation control device, and an irradiation control method. Provided is a particle beam therapy system capable of more accurately controlling a dose of a particle beam irradiated to a subject. A dose monitor (202) measures a dose of a beam (160). A position monitor (203) measures a beam size of the beam (160). An irradiation control device (108) calculates a measurement characteristic of the dose monitor (202) from the dose of the beam (160) and the beam size, and controls irradiation of the beam (160) to a patient (150) from the measurement characteristic and the dose.