35 results about "Pulse beam" patented technology

This application provides an inertial measurement method and system based on atomic interferometry. The method includes: controlling a first atomic beam and a second atomic beam to exit into an interference region, and sequentially interacting with three pulse beams in the interference region to detect the corresponding momentum transfer probability signals. The exit directions of the first and second atomic beams intersect and are symmetrical about the quantization axis. The effective pulse vector directions of the three pulse beams are adjusted so that the adjusted effective pulse vector directions are opposite to those of the original three pulse beams. The first and second atomic beams are then controlled to exit into the interference region, and sequentially interact with the adjusted three pulse beams in the interference region to detect the corresponding momentum transfer probability signals. Based on the four momentum transfer probability signals, the inertial measurement result is determined. Thus, by reversing the effective pulse vector direction, the interference area is reversed, effectively suppressing noise and drift terms unrelated to the effective pulse vector direction.

The aerosol generating product comprises a shell, the heating body, a fluid aerosol generating substrate and a pulse bundle guide piece, the pulse bundle guide piece comprises a main body part, a hollow cavity is formed in the main body part, the heating body is arranged in the hollow cavity, and the fluid aerosol generating substrate is arranged in the hollow cavity. The axis of the heating body is consistent with the axial direction of the hollow cavity, and the heating body is perpendicular to the bottom of the shell. A liquid path channel is formed between the fluid aerosol generating substrate and the pulse bundle guide piece; the pulse bundle guide piece comprises plant veins, and the pulse bundle guide piece takes air as a medium or is in direct contact with the heating body for heat exchange to generate aerosol; the invention further discloses an aerosol generating device comprising the heating body. According to the aerosol generating product containing the heating body, the vein bundle guide piece is made from veins of plants to conduct the fluid aerosol generating matrix, the aerosol generating product is healthy, baking fragrance can be provided when the vein bundle guide piece is heated, and the user experience feeling is close to that of cigarettes.

This invention belongs to the technical field of fluorescence lifetime measurement, and discloses a fluorescence lifetime measurement method and system based on time-gated fluorescence imaging. The method includes: acquiring multiple frames of fluorescence images of a sample, wherein the frame rate is greater than the pulse frequency of the pulse beam, and the frame rate and pulse frequency are not integer multiples of each other; the phase difference between two fluorescence images is a delay difference between the sampling delay of the two fluorescence images and their respective reference times; the reference time of each fluorescence image is the on-time of the pulse beam corresponding to its acquisition; calculating the average gray level of the fluorescence images; arranging the average gray levels within multiple pulse beam periods according to the sampling delay to obtain a time-gated sequence of average gray level variation with sampling delay; and obtaining the fluorescence lifetime of the sample by data fitting based on the time-gated sequence. Based on this method, the complexity and cost of detection can be reduced, and the limitations on application scenarios can be lessened.

Systems and methods for initializing an extreme ultraviolet (EUV) source are discussed. The EUV radiation source may include a droplet generator configured to generate a stream of droplets of a target material, a laser source communicatively coupled to a controller. The laser source is configured to generate a first pulsed beam of light, which upon interaction with a droplet, initiates a modification of a shape of the droplet, forming a modified droplet, and generate a second pulsed beam of light configured to substantially evaporate the modified droplet, thereby generating pulses of EUV light. The EUV radiation source comprises a first actuator communicatively coupled to the controller and configured to adjust a width of the second pulsed beam to minimize a variation of energy of the pulses of EUV light.

The invention discloses a carving machining method and system based on vector pulse laser, and belongs to the technical field of laser carving, the carving machining method based on the vector pulse laser comprises the steps that linear polarization femtosecond pulse laser is split into femtosecond pre-pulse laser and picosecond main pulse laser; adjusting the pulse time delay between the femtosecond pre-pulse laser and the picosecond main pulse laser; combining the femtosecond pre-pulse laser and the picosecond main pulse laser after delay regulation and control; the femtosecond pre-pulse laser is converted into an angularly polarized femtosecond pre-pulse light beam, the picosecond main pulse laser is converted into a radially polarized picosecond main pulse light beam, and a double-pulse light beam combination of the angularly polarized femtosecond pre-pulse light beam and the radially polarized picosecond main pulse light beam is formed; and the to-be-machined workpiece is ablated and engraved through the double-pulse light beam combination. And by means of the synergistic effect of double pulses and precise time delay, the width and fusion damage of a heat affected zone are remarkably reduced, and high-precision and low-damage carving machining is achieved.

This invention discloses a device for real-time analysis of multidimensional information of spatiotemporally mode-locked pulses using an all-fiber structure, belonging to the field of ultrafast optics technology. It includes an all-fiber spatiotemporally mode-locked laser platform, a raw pulse beam profile measurement module, an optical circulator, a sub-pulse beam profile measurement module, and a dispersive Fourier transform and real-time spectral information detection module. Based on the generalized multimode nonlinear Schrödinger equation, this invention constructs a theoretical model of the spatiotemporally mode-locked laser, explores the multidimensional parameter coupling mechanism during spatiotemporal mode-locking, clarifies the mapping relationship between modes and frequencies, and provides a theoretical basis and method for high-precision mode differentiation and multidimensional real-time information extraction. This invention aims to rationally design the parameters of each fiber grating according to the spectral width and temporal interval of the spatiotemporally mode-locked pulse, reflecting more sub-pulses while ensuring that the pulse temporal domains do not overlap, achieving high-precision spatial mode resolution, and maximizing pulse broadening to obtain high-resolution real-time spectral information.

The invention relates to an optical scanner for detecting objects in a monitoring area, comprising a two-dimensional scanner, a light transmitter for emitting a pulsed beam of light into the monitoring area, a detector for detecting light pulses reflected from an object in the monitoring area, and a continuously rotatable rotating mirror for pivoting the direction of transmission of the beam of light over a polar angle, a continuously rotatable rotor on which at least the light transmitter, the detector, and the rotating mirror are arranged for pivoting the direction of transmission of the beam of light over an azimuthal angle, a stator relative to which the rotor is rotatable about an axis of rotation, and a control and evaluation unit.The optical scanner is characterized by the fact that an optical separation device is arranged between the light transmitter and the detector to suppress optical crosstalk from the light transmitter to the detector, and by a device for contactless transmission of data and energy between the rotor and the stator.

An illumination source includes a droplet generator, a laser, a detector, and a controller. The droplet generator produces a stream of droplets of target material directed to an interaction region. The laser irradiates the droplets at the interaction region using a beam of pulses. The irradiated droplets generate output illumination of the illumination source. The detector measures an aspect of an interaction between a pulse from the beam and a droplet from the stream. Controller includes circuitry and determines a pulse timing adjustment that is nonlinearly dependent on the measured aspect. The controller also controls a subsequent laser pulse of the beam based on the pulse timing adjustment.

The invention discloses a high-current pulse ion beam extraction device for an ECR ion source, and the device comprises an ion source magnet which is used for providing a magnetic field, and the middle part of the ion source magnet is provided with a through hole in the axial direction; the plasma arc cavity is inserted into the through hole of the ion source magnet, and the injection end of the plasma arc cavity is provided with a gas inlet and a microwave feed inlet; the plasma electrode is arranged at the leading-out end of the plasma arc cavity, the plasma electrode inwards extends into the plasma arc cavity to form a section of cylindrical structure, and a beam leading-out hole is formed in an inner cavity of the cylindrical structure; and the pulse coil is wound outside the cylindrical structure of the plasma electrode, and the pulse coil is configured to form a magnetic field with the direction opposite to that of an extraction magnetic field of the ion source magnet so as to weaken the peak intensity of the extraction magnetic field. According to the invention, the intensity of the pulse beam led out by the ECR ion source can be obviously improved, so that the performance of the heavy ion accelerator is further improved, and powerful support is provided for the development of the heavy ion accelerator.

A system for and method of controlling the characteristics a pulsed beam of EUV radiation, for example by controlling one or both of the spatial extent of a plasma generated at the primary focus of the collector optics to produce the EUV radiation or the size and / or shape of an aperture at the intermediate focus of the collector optics.

Provided is a method including radiating first guide light, which guides a radiation position of a first pulsed beam, onto a suspicious tissue, receiving a first user input for instructing an output of the first pulsed beam while the first guide light is radiated, applying the first pulsed beam to the suspicious tissue to induce plasma ablation in a first target region corresponding to the radiation point of the first guide light, in response to the first user input, wherein the applying of the first pulsed beam is performed after obtaining first image data obtained by capturing an image of the first guide light and a tissue in a periphery the first guide light while the first guide light is radiated to the suspicious tissue, and obtaining target spectrum data on the plasma ablation, obtaining first disease information, and displaying the first image data and the first disease information.

The application provides a method for generating a multi-pulse terahertz beam with adjustable time interval of single pulse, which comprises the following steps: generating a pulse signal from a same terahertz wave source, then generating two or more pulse signals with consistent performance parameters through beam distribution, generating time interval through different time delay paths, and achieving the detection purpose by hitting the same detection area of the same research object. The method is based on the high-speed and high-precision modulation technology of the terahertz pulse of the pulse beam quasi-optical slow wave generator, and can realize the adjustment of the time interval of the pulse beam.

This application discloses a fiber laser, relating to the field of laser technology. The fiber laser includes a light source emitting module, an amplification module, and a frequency doubling module. The amplification module is located at the output end of the light source emitting module, and the frequency doubling module is located at the output end of the amplification module. The light beam emitted by the light source emitting module is a first composite beam, which has a continuous mode and / or a pulsed mode. The first composite beam includes a continuous beam and / or a pulsed beam. The first composite beam is amplified by the amplification module and then frequency-doubled by the frequency doubling module to output a second composite beam. The fiber laser of this application can output a second composite beam, which has the characteristics of dual wavelengths and dual operating modes, enriching the application scope of fiber lasers.

The application discloses a kind of spaceborne cloud radar beam conical spiral scanning forward-looking and rearview observation fast registration method, belong to meteorological radar signal processing and spaceborne observation registration technical field.The method includes: according to satellite orbit parameter and scanning geometry, the ground intersection of each pulse beam footprint is calculated, and footprint point set is constructed;According to the interval of scanning circle, the potential overlapping observation is traversed, and the candidate point pair is generated in combination with spatial distance gate;Matching cost function is constructed with footprint distance as main item and fusion observation consistency constraint, and effective registration point pair is obtained under one-to-one correspondence constraint;Registration point pair obtained by different scanning circle interval and different distance gate is accumulated and deduplicated, and global registration point set is formed.The present application makes full use of multiple overlapping observations of spiral trajectory, significantly increases the same sample, improves the reliability and precision of registration under the condition of high-speed spaceborne platform, and can provide high-quality input for subsequent three-dimensional observation data fusion, data quality control and data assimilation.

This invention discloses a manufacturing process for HDI boards used in automotive cameras. The process includes: perturbing the interface between the metallized hole walls and the insulating medium in the HDI board with a short-pulse beam to obtain stress resonance perturbation wave field data; recording phase perturbation through a high-pass filter layer to obtain time-series data on stress wave propagation and residence states; extracting spectral energy distribution parameters through two-dimensional Fourier transform to obtain an unsteady-state perturbation fingerprint; applying periodically gated pulse current to the micro-hole region to obtain charge hysteresis response data; applying scanning acoustic excitation and acquiring acoustic wave reflection data to obtain acoustic pressure transition parameters; and performing time synchronization and energy density comparison on the stress spectrum, hysteresis response spectrum, and acoustic pressure transition spectrum to output a stress fluctuation risk assessment result. This invention can detect and predict the dynamic stress fluctuation process of the submicron-level metallized hole wall film of the HDI board under complex loads, establish a quantitative relationship between stress fluctuation modes and potential failure risks, and improve the reliability of automotive camera HDI boards.

The application discloses a method for realizing pulse splitting and continuous adjustment of pulse interval through a three-wedge birefringent crystal structure and relates to the optical technical field. The method is used to solve the problems of the existing pulse splitting and delay technology, such as complex system, low control precision, poor flexibility, narrow application range and the like. The technical points of the application include that a laser pulse beam is incident on a first wedge-shaped crystal, the beam is split into two beams with perpendicular polarization directions, and the two beams generate an optical path difference; a second wedge-shaped crystal is adjusted to move in one dimension along the central axis direction of the crystal, thereby adjusting the time delay; after the two beams enter the second wedge-shaped crystal in sequence, the two beams become two parallel light paths; the optical axis direction of a third wedge-shaped crystal is perpendicular to the optical axis directions of the first wedge-shaped crystal and the second wedge-shaped crystal; after the two beams pass through the third wedge-shaped crystal, the optical path difference of the two beams and the first optical path difference are offset from each other, thereby realizing the collinear transmission of the two pulses.

The subject matter of this specification can be implemented in, among other things, a system that includes a first light source to produce a pulsed beam and a second light source to produce a continuous beam, a modulator to impart a modulation to the second beam, and an optical interface subsystem to transmit the pulsed beam and the continuous beam to an outside environment and to detect a plurality of signals reflected from the outside environment. The system further includes one or more circuits configured to identify associations of various reflected pulsed signals, used to detect distance to various objects in the environment, with correct reflected continuous signals, used to detect velocities of the objects. The one or more circuits identify the associations based on the modulation of the detected continuous signals.

This invention relates to a method and apparatus for photoacoustic bone metabolism feature analysis based on optical field modulation. The method includes: exciting a periodic pulsed beam with a laser; modulating the original laser beam into a spatially modulated beam using a spatial light modulator; irradiating the bone to be tested in a through-beam mode; constructing a controllable, gradually varying acoustic velocity gradient between the bone tissue and the ultrasound probe using a hydrogel with progressive acoustic impedance; acquiring photoacoustic signals generated by multiple wavelength pulsed beams incident on the bone to be tested in a photoacoustic through-beam mode during one detection cycle; fitting the photoacoustic signals corresponding to different wavelengths according to a set photoacoustic transmission equation to calculate the optical absorption spectrum curve of the bone to be tested. Compared with existing technologies, this invention has the advantages of being non-invasive, radiation-free, highly efficient, having high photoacoustic signal excitation efficiency, and a high signal-to-noise ratio.

The invention discloses a plasma diagnosis and pulsed ion beam generation device for an ECR ion source, and the device comprises an ion source magnet which is used for providing a magnetic field for constraining electrons, and the middle part of the ion source magnet is provided with a through hole in the axial direction; the plasma arc cavity is inserted in the through hole of the ion source magnet, the injection end of the plasma arc cavity is provided with a gas inlet and a microwave feed inlet, and the leading-out end of the plasma arc cavity is provided with a beam leading-out hole; the insulating outer cylinder is arranged between the ion source magnet and the plasma arc cavity; the pulse coil is wound outside the plasma arc cavity and can translate along the axial direction, and the pulse coil is configured to form a magnetic field opposite to the magnetic field direction of the ion source magnet so as to weaken the peak intensity of the led-out magnetic field; and the insulating inner cylinder is arranged in the annular gap between the plasma arc cavity and the insulating outer cylinder and can translate along the axial direction, and the inner end of the insulating inner cylinder is connected with the pulse coil. According to the invention, the plasma diagnosis capability of the ECR ion source can be improved, and the intensity of the pulse beam led out by the ECR ion source can also be improved.

The invention discloses an atmosphere multi-parameter synchronous inversion method and system, and belongs to the technical field of atmosphere laser remote sensing. Probe light and reference light are obtained through laser pulse beam splitting; the probe light is vertically emitted into the atmosphere after being subjected to beam expansion and then is scattered by the atmosphere to obtain echo light; namely, all parameters are from the same measurement and the same spectrum, the data space-time consistency is perfect, the measurement mode is efficient, and the measurement result is accurate. And calculating a temperature parameter and a pressure parameter in the atmosphere by using the normalized scattered spectrum so as to obtain an aerosol parameter and a wind speed parameter, so that true synchronous inversion of four key parameters, namely temperature, pressure, wind speed and aerosol is realized for the first time. Besides, in applications such as meteorological prediction, synchronous measurement of atmospheric temperature, pressure, wind speed and aerosol is realized, the cost can be saved, the efficiency can be improved, and the method has important practical significance.

The embodiment of the invention discloses a radio frequency ion source system and a control method thereof, electronic equipment and a storage medium, and relates to the technical field of ion sources, the radio frequency ion source system comprises a power supply and control module, a radio frequency discharge unit, an ion extraction unit and a neutralization electron source; wherein the power supply and control module generates a radio frequency signal and a pulse voltage, outputs the radio frequency signal to the radio frequency discharge unit, and outputs the pulse voltage to the ion extraction unit; working gas in the radio frequency discharge unit generates plasma under the excitation of a radio frequency signal, and the plasma is output to the ion extraction unit; the plasma in the ion extraction unit passes through the ion extraction unit under the driving of the pulse voltage and generates a pulse ion beam; and the neutralization electron source generates an electron flow at the rising edge of the pulse voltage, and synchronously outputs the electron flow and the pulse ion beam to obtain a pulse beam current. According to the embodiment of the invention, the pulse beam with concentrated energy spectrum distribution and low energy broadening is realized.

The invention discloses a light splitting system and a time resolution system for ultrafast continuous measurement. The light splitting system comprises a plurality of groups of four-crystal monochromators, a beam stopper and a posture adjusting mechanism, each posture adjusting mechanism is provided with one four-crystal monochromator and is used for adjusting the posture and the position of the four-crystal monochromator; wherein different groups of four-crystal monochromators are used for splitting a path of sub-light beams with different energy from light emitted by the light source and adjusting the optical path of the sub-light beams, and the adjusted sub-light beams are combined on the same optical axis; the beam baffle is used for blocking unmodulated light beams in light emitted by the light source from being transmitted along the optical axis. According to the invention, the X-ray pulse beam cluster emitted by the synchrotron radiation undulator is modulated into a series of picosecond-level interval X-ray photon pulses, so that the instantaneous process can be measured, and the rapid and continuous measurement capabilities of diffraction, scattering, imaging and the like can be improved from the current international millisecond-microsecond level to microsecond, nanosecond and picosecond levels; and a series of important scientific problems such as molecular dynamics and explosion mechanism are solved.

A substrate inspection apparatus includes a light source unit, a pulsed beam matching unit, a substrate support unit, an incidence angle adjusting unit, and a detecting unit. The light source unit emits first and second laser beams. The pulsed beam matching unit matches the first and second laser beams to superimpose a pulse of the first laser beam on a pulse of the second laser beam in time and space. The incidence angle adjusting unit adjusts angles of incidence of the matched first laser beam and second laser beams to irradiate the first laser beam and the second laser beam on the substrate, and mixes the first and second laser beams to generate an evanescent wave on the substrate. The evanescent wave generates scattered light due to a defect of the substrate. The detecting unit detects the scattered light generated due to the defect of the substrate.

The invention discloses a metamaterial resonant cavity and an accelerator beam flow intensity measuring device and method, and relates to the field of particle acceleration equipment, the metamaterial resonant cavity comprises an insulator and an electrode body formed by a substrate and a metamaterial unit array arranged on the substrate; the electrode body is disposed in the cavity, and the insulator is disposed between the electrode body and the cavity. The metamaterial resonant cavity provided by the invention can greatly improve the signal-to-noise ratio of a signal, is applied to beam current intensity measurement, and aims to overcome the contradiction between the sensitivity and the time resolution of a traditional non-interception type measurement method so as to thoroughly solve the problems of the acceleration and the time resolution of an accelerator. And particularly, the problem of real-time accurate monitoring in a low-flow-intensity and short-pulse beam device is solved.

The application discloses a quantum secure direct communication method based on a symmetric passive light source, wherein information receivers use four phase random coherent pulses to generate weak coherent pulse beams with random intensity and quantum state through beam splitters and polarization beam splitters interference, beam combination and attenuation, and send the beams to information senders. The information senders send the photon pulses back to the information receivers after encoding. The information receivers decode the information sent by the information senders according to the initial pulse information sent by the information receivers. The method does not need to actively modulate the intensity and quantum state of the light source, can simultaneously realize passive decoy states and passive encoding, can simplify experimental operation, can resist side channel attacks of a light source modulator by a third-party eavesdropper, and can enhance the security of quantum secure direct communication.

The invention relates to an X-ray source (100) by interaction between a focused laser pulse beam (40) and a target material. According to the invention, the X-ray source (100) comprises a resurfacing device (20), a first laser source (30) capable of emitting said laser pulse beam along a first optical axis, the target material (10) being movable with at least two degrees of freedom, the surface of the target material being adapted to receive the focused laser pulse beam and to generate X-rays, the focused laser pulse beam locally inducing an ablation crater (45) in an area of ​​the surface of the target material, the resurfacing device being configured to resurface the area of ​​the surface of the target material ablated by the laser pulse beam. Figure for the abstract: Fig. 1

The invention relates to the technical field of dental medical imaging equipment, in particular to a dental X-ray imaging system based on a cold cathode. The system comprises a data acquisition module, a control processing module and an image display module. Tooth density data and jaw structure data of an oral cavity of a patient are acquired in real time through the data acquisition module, the control processing module establishes a parameter prediction model of the cold cathode X-ray source based on deep learning, the cold cathode X-ray source is utilized to emit pulse beams, teeth of the patient are imaged, and the accuracy of tooth detection is improved. The image display module calculates the deviation between an image quality index and a standard quality index, generates a parameter correction amount, adjusts the pulse parameters of the cold cathode X-ray source through a PID control algorithm, accurately adapts to oral conditions of different patients, improves the imaging accuracy and definition, reduces the radiation dose of the patients, and provides a safety guarantee for the patients.

The data generation method of the present invention includes the following steps: acquiring test processing condition information, the test processing condition information including the number of pulses to be irradiated at each of the multiple irradiation positions of the test workpiece in order to process the test workpiece into a target shape; measuring the shape of the test workpiece after processing based on the test processing condition information, i.e., the test workpiece shape; and calculating the target number of pulses to be irradiated at the multiple irradiation positions of the workpiece based on the test processing condition information, the test workpiece shape, and the predicted information of the shape of the part processed by irradiating a pulse beam of a unit number of pulses.

This invention relates to a beam chopping system for particle accelerators and its usage method, comprising a DC high-voltage chopper, a host computer, and an eccentric electrode plate. The DC high-voltage chopper generates PWM pulse signals in a corresponding operating mode, converting an external DC voltage input into a target high-voltage pulse signal with a time structure consistent with the given PWM pulse signal and an amplitude consistent with the DC high-voltage power supply output. The host computer issues time parameters, example files, and operating mode control commands for the given PWM signal required for the DC high-voltage chopper to generate the high-voltage pulse, controls the operation of the DC high-voltage chopper, and acquires and analyzes the target high-voltage pulse signal of the DC high-voltage chopper. The eccentric electrode plate applies the target high-voltage pulse signal output by the DC high-voltage chopper, converting the incoming DC beam or pulse beam into a pulse beam that meets the physical beam supply requirements. This invention can be widely used in the field of particle accelerators.

This application proposes a method and system for detecting particulate matter concentration based on light scattering, relating to the field of environmental monitoring technology. The method includes: separating a laser pulse beam used for detecting particulate matter concentration into a first incident light and a second incident light; performing photoelectric detection on the first incident light to generate a first current signal synchronized with the laser pulse beam; collecting particulate matter scattered light generated by the second incident light irradiating particulate matter; performing photoelectric detection on the particulate matter scattered light to obtain a second current signal triggered by the particulate matter scattered light; using the first current signal as a reference signal, performing phase-sensitive detection on the second current signal, and extracting the effective scattered signal synchronized with the laser pulse beam from the second current signal based on the phase-sensitive detection result; and determining the particulate matter concentration based on the effective scattered signal. This solution improves the accuracy of particulate matter concentration detection.