71 results about "Streak camera" patented technology

The invention provides an online auxiliary aiming device for an X-ray streak camera. The online auxiliary aiming device comprises a reading camera, an optical coupling lens, a lens connecting piece, an inclination angle adjusting platform, a vacuum window flange, a reflector and a scintillator assembly. The optical coupling lens is respectively connected with the reading camera and the lens connecting piece; the lens connecting piece is arranged on the inclination angle adjusting platform; the inclination angle adjusting platform is arranged on the vacuum window flange, and the view field of the camera is read by adjusting the angle; the vacuum window flange is used for isolating atmosphere from a vacuum environment; the reflecting mirror is arranged in a vacuum environment in the vacuum window flange; the scintillator assembly is arranged at a preset cathode slit of the streak camera. Reference can be provided for adjustment, aiming precision is improved, aiming time is shortened, and experiment efficiency is improved.

The invention discloses a compression ultrafast imaging device based on time domain discrete illumination. The device is composed of a time domain discrete illumination compression ultrafast imaging system, a time sequence control system and an image reconstruction system. Time domain discrete illumination is provided for a to-be-measured scene through a pulse sequence generator, dozens of time slices of the to-be-measured scene are uniformly intercepted, spatial random coding is carried out, then the time slices are transmitted into a streak camera for space-time deflection and superposition imaging, and finally the to-be-measured scene is restored by adopting an image reconstruction algorithm (TV-CD) combining a total variation noise reduction model and a cascade noise reducer. The invention relates to a time domain discrete illumination compression ultrafast imaging technology (DI-CUP) for short. According to the invention, not only can single multi-image ultrafast imaging be realized, but also the data compression ratio can be reduced, the spatial resolution can be improved, and the observation time window is flexible and adjustable. The above advantages provide an accurate and effective measurement tool for non-repeatable ultrafast processes such as light pulse propagation and plasma evolution, and are of great significance to the development of related research and technology of natural science.

The invention provides a space-time resolution X-ray diagnosis system, relates to the technical field of X-ray diagnosis systems, aims to realize convenient cathode replacement, no circulating water leakage risk and imaging monitoring function, and relates to a pinhole / slit imaging system assembly and an air chamber type X-ray streak camera. The pinhole / slit imaging system assembly is mounted on a front panel of the air chamber type X-ray streak camera; the air chamber type X-ray streak camera comprises an air chamber and a camera assembly arranged in the air chamber. The camera assembly comprises an X-ray scanning image converter tube installed at the front end of the air chamber. A circulating water refrigerating system in the camera assembly is completely arranged in the air chamber; the pinhole / slit imaging system assembly is used for aiming at the position of a target spot and imaging X-rays emitted by the target spot to a cathode slit of the air chamber type X-ray streak camera, and the X-ray scanning image converter tube is used for achieving time scale light back illumination coupling. The method has the advantages of improving the use convenience and prolonging the service life of the device.

The utility model relates to a periscope system for focusing and aiming an x-ray streak camera outside a target chamber. In a laser fusion experiment, an x-ray streak camera is crucial to observation of self-illumination of x-rays, however, diagnosis arrangements in a target chamber are various, and aiming in the target chamber is very inconvenient. In order to solve the problem, a periscope system which is formed by combining three reflectors and a semi-reflecting and semi-transmitting mirror and debugged to auto-collimation is embedded into a flight tube, images of a target ball, a pinhole and a camera slit are led to an outside point, and then focusing observation equipment is used for aiming. By means of the periscope system, aiming of the x-ray streak camera can be more convenient and simpler, the x-ray streak camera does not need to enter the target chamber, no space for containing a long-focal-length telescope in the target chamber and interference and influence on other diagnostic equipment in the aiming process do not need to be considered, experiments can be conducted smoothly, and normal work of other diagnostic equipment is guaranteed.

The invention discloses a three-channel ultrafast compression imaging system with high spatial-temporal resolution and an image reconstruction method, the three-channel ultrafast compression imaging system comprises a dual-channel recording assembly, a diffraction optical element and a streak camera without a lens are additionally arranged, and parameters of the diffraction optical element and the lens are set; the two light paths are imaged at different positions of the streak camera sensor, and the photosensitive areas of the pixel points are distributed in a staggered manner relative to the image, so that the sampling rate is multiplied, then an integral channel recording assembly is additionally arranged, and an integral image is recorded by using the CMOS camera. The sampling rate is improved by three times by integrating the dual-channel recording assembly and the integral channel recording assembly, and the problems that the traditional single-channel ultrafast compression imaging system technology loses space information and the dynamic range of the streak camera is insufficient are solved; according to the image reconstruction method, a two-dimensional image with extremely high quality can be reconstructed, so that the problem of distortion in description of shock wave features is avoided, and the analysis accuracy of the velocity field is improved.

The invention belongs to the field of optical elements, and relates to an X-ray streak camera diagnostic system aiming device and method, and the device comprises a long-focus microscope, a simulation target, a simulation cathode device, a supporting platform, a first adjusting platform, and a second adjusting platform. The aiming method comprises the following steps: mounting a pinhole camera on a mounting flange of a simulated cathode device; a pinhole head of the pinhole camera is adjusted, so that the view field center of the long-focus microscope, the pinhole head of the pinhole camera and the simulated cathode slit center of the simulated cathode device are collimated; target position coordinates of the simulation target in the image acquired by the CCD camera are determined; disassembling and assembling the pinhole camera to an X-ray streak camera diagnosis system, and adjusting the position coordinates of the target in the CCD field of view to the target position coordinates; rapid aiming of the X-ray streak camera on a large laser device under the vacuum off-line condition is achieved.

The invention belongs to a splicing device, and provides an X-ray streak camera slit splicing device and a using method thereof in order to solve the technical problems that according to an existing X-ray streak camera cathode slit manufacturing method, the slit width is limited, the machining cost of a slit with a special size is high, and the survival rate of the machined slit is low. Comprising a displacement adjusting assembly, a slit blade displacement sliding table and a supporting frame body, the displacement adjusting assembly comprises an adjusting gear and a displacement measuring piece installed on the adjusting gear and used for displaying the adjusting amount of the adjusting gear, and the slit blade displacement sliding table comprises a first displacement piece and a second displacement piece which are used for fixing two slit blades respectively; the relative movement between the first displacement piece and the second displacement piece is adjusted through the adjusting gear in a gear and rack transmission mode, and the first displacement piece and the second displacement piece are in sliding fit with the supporting frame body. The adjustment time is shortened, and the efficiency and quality of X-ray streak camera slit splicing are greatly improved.

The present invention discloses a transmission-type three-channel compressed ultrafast imaging device to solve the problem that the existing compressed ultrafast imaging system cannot flexibly change the dual-coding sampling rate, resulting in low quality of reconstructed images and failure to meet the needs. Specifically, it includes a 4f system, a first light conversion component, a second light conversion component, a first coding plate, a second coding plate, a streak camera CCD camera and a processing unit; the 4f system is located on the target light; the first light conversion component converts the target light into a first light beam and a second light beam; the second light conversion component is arranged on the optical path of the second light beam; the streak camera is arranged on the optical paths of the first light beam and the third light beam; the first coding plate is arranged between the first light conversion component and the streak camera, and is located on the optical path of the first light beam; the second coding plate is arranged between the second light conversion component and the streak camera, and is located on the optical path of the third light beam; the first coding plate is not related to the second coding plate; the processing unit is connected to the output ends of the streak camera and the CCD camera respectively.

The present invention provides a high-spectral fluorescence lifetime imaging system and method based on a streak camera, which solves the problems of slow acquisition speed, low spectral resolution, or data acquisition time in the order of minutes or even hours, and limited number of spectral resolution channels in the existing spectral fluorescence lifetime imaging technology. The system includes a pulse light source module, a pulse light coupling module, a pulse light encoding module, a coding pattern coupling module, a beam splitter, a microscope and a signal processing unit and a synchronization control module arranged on two output light paths of the beam splitter; the pulse light generated by the pulse light source module is imaged on the sample surface through the pulse light coupling module, the pulse light encoding module, the coding pattern coupling module, the beam splitter, and the microscope, and the fluorescence signal generated by the sample after excitation enters the signal processing unit through the microscope and the beam splitter; the signal processing unit includes a signal focusing module, a spectral light splitting module, a streak camera and a data processing module arranged in sequence on the output light path of the beam splitter.

The present application relates to the technical field of laser imaging, and in particular to a high-precision dynamic coupling method and device for a variable-tapered curved crystal and an X-ray streak camera, the method comprising: under the same optical path, respectively irradiating a variable-tapered curved crystal with a visible light source and X-rays, so that the variable-tapered curved crystal forms a visible light source focal line and an X-ray focal line on an imaging plate; acquiring position information of the visible light source focal line and the X-ray focal line by means of an image acquisition device, and extracting a focal line relative deviation; coupling the variable-tapered curved crystal and the X-ray streak camera by means of a three-dimensional adjustment mechanism, and continuously irradiating the variable-tapered curved crystal with the visible light source; and adjusting the position of the variable-tapered curved crystal by means of the three-dimensional adjustment mechanism according to the image acquisition device and the focal line relative deviation, so that the X-ray focal line coincides with a cathode slit of the X-ray streak camera. The purpose is to achieve high-precision coupling of the variable-tapered curved crystal and the X-ray streak camera.

The present application relates to a kind of dynamic performance calibration systems for streak camera fast scanning gear, mainly used to solve the technical problems that the operation is complex when multiple pulse trains are generated by the existing light splitting and beam combining mode, and the consistency of optical path difference between each light path is difficult to guarantee, and the conventional electrical signal trigger mode exists sway, influence the time resolution capability calibration of streak camera.The present application can simultaneously generate multiple optical pulse trains, and the time interval consistency between multiple optical pulse trains is high.The optical pulse output by the laser is divided into the first light beam transmitted by the beam splitter and the second light beam reflected, the second light beam is input to the fast-response photodiode, and then converted into an electrical pulse to trigger the streak camera to work.The first light beam is input to the streak camera through the F-P standard device, and the streak camera reads the streak image output by the streak camera and analyzes it.The present application also provides a kind of dynamic performance calibration method for streak camera fast scanning gear.

The present application relates to a method, apparatus, computer device, storage medium, and computer program product for detecting vehicle body paint defects. The method comprises: obtaining an initial vehicle body image captured by a streak camera under sinusoidal stripe light; performing defect enhancement on the initial vehicle body image using an optical flow method to obtain a defect-enhanced vehicle body image; performing defect detection on the defect-enhanced vehicle body image to obtain the vehicle body paint defect location in the camera coordinate system; and mapping the vehicle body paint defect location in the camera coordinate system to the vehicle body's three-dimensional coordinate system to obtain the target vehicle body paint defect location. Throughout this process, vehicle body paint defect detection is performed based on the initial vehicle body image captured by the streak camera under sinusoidal stripe light, and the initial vehicle body image is enhanced using the optical flow method, thereby achieving efficient and accurate vehicle body paint defect detection.

The invention relates to an anti-jitter streak camera ToF dynamic three-dimensional shape reconstruction system and method based on distance reference time mark light, and aims to solve the technical problem that the existing streak camera ToF dynamic three-dimensional shape measurement system is easy to have depth measurement error, and the system comprises a pulse light source module, an illumination and imaging module, a streak camera and an industrial control module; the pulse light source module generates pulse light and transmits the pulse light to the illumination and imaging module; the illumination and imaging module processes the pulsed light to form illumination line light and distance reference time mark light, and transmits the illumination line light to a to-be-measured target; the to-be-measured target generates an echo light signal and transmits the echo light signal to the illumination and imaging module; the illumination and imaging module is used for imaging the distance reference time mark light and the echo light signal to the streak camera; the streak camera collects a streak image and transmits the streak image to the industrial control module; and the industrial control module obtains a target measurement depth according to the fringe image, corrects the target measurement depth, and reconstructs a dynamic three-dimensional shape image of the target to be measured according to the corrected target measurement depth.

The present invention provides an ultrafast time-compressed image acquisition method based on on-chip storage, which is used to address the technical problem that the ultrafast compression imaging technology of a streak camera for a target scene is limited by the working principle of the streak tube, resulting in a time resolution of the order of picoseconds to sub-nanoseconds and a low spatial resolution. The method of the present invention comprises: selecting pixel areas with pixel resolutions of M×N and M×L as imaging photosensitive areas and imaging storage areas, respectively; making a pseudo-random mask plate to cover the imaging photosensitive area, and covering the imaging storage area with an opaque mask plate; imaging the target scene on the imaging surface of the imaging photosensitive area; exposing the target scene and performing an initial image, and transferring the image of the imaging photosensitive area as a whole by one row along the charge storage transfer direction; after the transfer is completed, exposing the imaging photosensitive area and continuing to acquire the image, and executing i=i+1 after the exposure is completed; if i≤L, outputting the next row of images, and so on until i>L, thereby obtaining a time-compressed image of the target scene.

This invention belongs to the field of optical components and relates to an aiming device and aiming method for an X-ray streak camera diagnostic system. The device includes a long-focusing microscope, a simulated target, a simulated cathode device, a support platform, a first adjustment stage, and a second adjustment stage. The aiming method includes: mounting a pinhole camera on the mounting flange of the simulated cathode device; adjusting the pinhole head of the pinhole camera to align the center of the long-focusing microscope's field of view, the pinhole head of the pinhole camera, and the center of the simulated cathode slit of the simulated cathode device; determining the target position coordinates in the image acquired by the CCD camera; detaching and installing the pinhole camera into the X-ray streak camera diagnostic system, and adjusting the target's position coordinates in the CCD field of view to the target position coordinates; achieving rapid aiming of the X-ray streak camera on a large laser device under vacuum offline conditions.

The invention relates to a high-sensitivity streak camera ultrafast scanning image enhancement and noise reduction method, and belongs to the technical field of ultrafast imaging and signal processing. The method mainly comprises the following steps of: performing spatial modulation on three-dimensional image data coded by a spatial coding element through a periodic grating; carrying out compression imaging on the modulated three-dimensional image data by the streak camera to form a two-dimensional observation image; an ADMM-TV algorithm is adopted to carry out image decoding, and a three-dimensional image containing a periodic modulation structure is recovered; after the three-dimensional image is reconstructed, effective fringe information in the modulated image is further extracted, high-frequency modulation residues are removed, and denoising of the interference fringe image is achieved. Physical separation of signals and noise is achieved through periodic grating modulation, high-frequency interference such as space charge noise can be restrained, the signal-to-noise ratio and contrast ratio of images are improved, and accuracy and stability of diagnosis of an ultrafast imaging system of a VISAR speed interferometer are improved.

A method for taking a measurement from a reflective object (2) or a transparent object (2) by means of a deflectometer (1) includinga display (10) displaying dynamic fringes; a camera (20) configured to acquire images of the fringes reflected by the reflective object (2) and / or images of the fringes transmitted through the transparent object (2); and a computer (30) configured to run a program in order to perform the measurement based on the images acquired by the camera (20). The method includessuccessively acquiring the images of the fringes reflected and / or transmitted by the object (2) in at least two configurations of an optical system defined by the display (10), the object (2), and the camera (20); based on the acquired images, running the program and calculating possible solutions for the shape of the object (2) and for the position of the object (2) within the optical system defined by the display (10), the object (2), and the camera (20), in each of the configurations; and obtaining a final solution for the shape and position of the object (2) by identifying a single solution common to the previously calculated possible solutions.

The present invention provides a streak camera with a self-detection function and a self-detection method thereof, which relates to the technical field of streak camera detection methods, and aims to quickly judge the performance of a camera through a convenient detection system, wherein a camera lens and a self-detection module are arranged at the front end of a camera chassis; a synchronous trigger signal output connector is used to output a trigger signal for a long pulse light source module; an optical imaging lens is installed at the front end of the camera chassis, a slit is arranged at the front center of the optical imaging lens, a detachable resolution board is closely attached to the front end of the slit, a long pulse light source module is arranged above the middle section of the optical imaging lens, an input optical module is installed at the front end of the optical imaging lens, an optical fiber connector is arranged at the front center of the input optical module, and a collimation module is arranged at the rear end of the optical fiber connector; the output interface of the long pulse light source module is connected to the optical fiber connector through an optical fiber. The present invention has the advantages of convenient camera performance detection and simple structure.

The present invention relates to a time-of-flight ranging system and method, and particularly to a surface-scanning time-of-flight three-dimensional imaging system and method based on a streak camera. It solves the technical problems of low resolution in TOF distance measurement based on traditional single-photon detection devices and slow speed in line-scanning three-dimensional imaging based on streak cameras. The system of the present invention includes an illumination unit, a signal acquisition unit, a data processing unit, and a synchronization control unit; the illumination unit is used to illuminate the imaging area of the target to be measured to generate an echo signal; the signal acquisition unit includes a coupled imaging device, an optical fiber conversion device, an optical fiber transmission module, and a streak camera; the echo signal is coupled and imaged by the coupled imaging device, and the area array optical fiber is converted into a line array optical fiber by the optical fiber conversion device, and then sent to the streak camera through the optical fiber transmission module to output a streak image; the streak image is processed by the data processing unit to obtain a three-dimensional image. At the same time, the present invention also provides a surface-scanning time-of-flight three-dimensional imaging method based on a streak camera.

The invention provides a scanning pulse circuit of a slow-scanning streak camera, relates to the technical field of camera pulse circuits, aims to be better suitable for the slow-scanning streak camera and have better adjustability, and comprises a power supply module, a trigger buffer module, a positive pulse branch and a negative pulse branch, the input end of the first driving circuit and the input end of the second driving circuit are connected to the output end of the trigger buffer module, and the input end of the trigger buffer module is connected with a trigger signal; the positive pulse generation circuit outputs positive pulses, the negative pulse generation circuit outputs negative pulses, the trigger buffer module is used for outputting on-off control signals, and the power supply module is used for supplying power to the trigger buffer module, the positive pulse branch circuit and the negative pulse branch circuit. According to the invention, the waveform adjusting range is wider, the voltage amplitude of the linear working area is larger, and the slope adjusting range is wider.

The application belongs to the technical field of glass and specifically relates to a glass material with high corrosion resistance and stability, the cation composition of which is as follows in terms of mole percentage: 61-70% of Si 4+ , 3-12.5% of B 3+ , 1-5.5% of Al 3+ , 5-13% of K + , 5-13% of Na + , 0.2-3% of Ca 2+ , 0.1-2% of Li + , 0.1-1% of Mg 2+ , and 0.1-1% of Ti 4+ . The application is designed in a multi-component and multi-functional synergistic manner, so that the prepared glass meets the harsh requirements on thermal, optical, chemical and processing properties, is suitable for high-end optical devices such as micro-channel plates, and has a wide application prospect in the fields of photoelectric detection and imaging, mass spectrometers, high-energy physics, streak cameras, high-end medical imaging and the like.

The application discloses a kind of real-time multi-view three-dimensional imaging system and imaging method, solve the problem that the cost of obtaining different view three-dimensional information is too high, and system is not enough integrated.Specifically including the first beam splitter, second beam splitter, third beam splitter and fourth beam splitter of rectangular structure distribution, first encoding plate is arranged between second beam splitter and fourth beam splitter, second encoding plate is arranged between third beam splitter and fourth beam splitter, in addition still including light source, first imaging lens, second imaging lens, stripe camera and processing unit;The application adopts three beam splitters and a fourth beam splitter to make that stripe camera can obtain the 3D information of different view in single time, and the first encoding plate and second encoding plate of transmission type are used to encode the 3D information of different view respectively, simplify system structure, beneficial to system integration, while also simplify the energy loss of DMD encoding device, reduce signal detection cost.

The invention discloses a streak camera image flat field correction system and method based on a pulse time-varying light source under a working scanning speed, and solves the problems of inaccurate response uniformity and high realization difficulty of an image flat field corrected by an existing method. The device specifically comprises a signal source, a pulse time-varying light source, a monitoring photoelectric detector, an oscilloscope and a series of attenuation slices with different transmittances, an A output channel of the signal source is connected with the pulse time-varying light source, a B output channel of the signal source is connected with the streak camera, and a C output channel of the signal source is connected with a first input end of the oscilloscope; the emergent end of the pulse time-varying light source corresponds to the incident end of the streak camera; the detection end of the monitoring photoelectric detector corresponds to the pulse light emitted by the pulse time-varying light source, and the output end of the monitoring photoelectric detector is connected with the second input end of the oscilloscope; a series of attenuation slices with different transmittances are used for being arranged at the emergent end of the pulse time-varying light source in a switching mode so as to attenuate the intensity of emergent pulse light of the pulse time-varying light source to different degrees.

This invention discloses a single-shot shock wave velocity measurement system and method with timing calibration capability. The single-shot shock wave velocity measurement system includes a target chamber, a probe laser generation module, a timing calibration target, an interferometer, a streak camera, a focusing lens, a timing laser introduction module, and multiple main laser generation modules. During the timing calibration of the single-shot shock wave velocity measurement system, a customized timing calibration target reflects the main laser signal and the probe laser signal along the same optical path. A focusing lens is used to improve the signal-to-noise ratio. Simultaneously, a dedicated timing laser transmission component introduces the timing laser signal into the slit of the streak camera. This allows for the simultaneous acquisition of the main laser signal, the probe laser signal, and the timing laser signal in a single-shot measurement, achieving in-situ precise timing calibration for a velocity measuring instrument corresponding to any reflective surface.

The present invention discloses a three-channel compression imaging system and an image reconstruction method. The three-channel compression imaging system includes a dual-channel recording component. By adding a diffraction optical element and a streak camera without a lens, the parameters of the diffraction optical element and the lens are set so that two light paths are imaged at different positions of the streak camera sensor, and the photosensitive areas of the pixel points are staggered relative to the image, thereby doubling the sampling rate. Then, an integral channel recording component is added, and the integral image is recorded using a CMOS camera. The combination of the dual-channel recording component and the integral channel recording component achieves a three-fold increase in the sampling rate, overcoming the problem of spatial information loss and insufficient dynamic range of the streak camera in traditional single-channel ultrafast compression imaging system technology. The image reconstruction method can reconstruct extremely high-quality two-dimensional images to avoid distortion in the depiction of shock wave characteristics and improve the accuracy of velocity field analysis.

The invention relates to a low time dispersion reflection type optical system and an ultrafast imaging streak camera, which are mainly used for solving the problems that an optical path difference about picosecond is introduced in a visible light spectrum range under the condition that a transmission type optical input lens is provided with a wide spectrum light source, so that the imaging quality and time resolution are influenced; and the technical problem that the streak camera in the existing synchrotron radiation light source device is difficult to measure the length of the electron beam bunch under the condition of low current intensity is solved. In the low-time-dispersion reflective optical system, a primary mirror, a third mirror and a secondary mirror form an off-axis three-mirror structure, a front mirror is arranged at the incident end of the off-axis three-mirror structure, a rear mirror is arranged at the emergent end of the off-axis three-mirror structure, and reflectors are adopted, so that time dispersion is effectively reduced; and only 2fs optical path difference is introduced for a light source in a visible light band spectral range, so that the optical lens has the characteristic of small time dispersion, and has remarkable advantages compared with the time dispersion of a traditional transmission-type optical lens in a visible light band picosecond order.

The present invention provides a multi-line imaging velocity interferometer and a shock wave velocity measurement method based on the interferometer, which solves the problem that the existing laser fusion spherical fuel compression symmetry diagnosis cannot accurately infer the space-time process of fuel compression. The interferometer includes a laser source, a probe coupling mirror, a probe beam splitter, a front-end lens, a signal beam splitter, and two heterodyne interference optical path units; the laser emitted by the laser source is focused on the surface to be measured through the probe coupling mirror, the probe beam splitter, and the front-end lens, and the signal reflected by the surface to be measured enters the signal beam splitter through the front-end lens and the probe beam splitter, is divided into two beams and enters the two heterodyne interference optical path units respectively; each heterodyne interference optical path unit includes an interferometer pre-mirror, a multi-line beam splitter group, a first heterodyne interference component, a streak camera, and N-1 second heterodyne interference components; the signal light is divided into N branches by the multi-line beam splitter group; the N branches are respectively imaged on the streak camera through the first heterodyne interference component and the N-1 second heterodyne interference components.

The invention relates to a synchrotron radiation X-ray pulse time width measuring device, which comprises a main clock, a time synchronization control device, an X-ray streak camera and an upper computer, and is characterized in that the main clock is used for providing a time reference for a synchrotron radiation light source, the time synchronization control device is connected with the main clock, and the X-ray streak camera is connected with the time synchronization control device; the upper computer is respectively connected with the time synchronization control equipment and the X-ray streak camera; the upper computer is used for enabling the time synchronization control equipment to transmit a trigger signal to the X-ray streak camera according to the time reference of the main clock, and a preset time delay exists between the trigger signal and the time reference of the main clock; the X-ray streak camera is used for receiving the X-ray pulse generated by the synchrotron radiation light source and collecting and outputting an X-ray pulse image under the triggering of the triggering signal; the X-ray pulse image is transmitted to an upper computer, so that the upper computer obtains the time width of the X-ray pulse according to the X-ray pulse image.

The present invention provides a method for continuously acquiring time-compressed images based on a line-scan image sensor, which is used to address the technical problem that ultrafast compressed imaging technology for a streak camera of a target scene is limited by the working principle of a streak tube, resulting in a time resolution of picoseconds to sub-nanoseconds and low spatial resolution. The method comprises: selecting a line-scan image sensor with a pixel resolution of M×N; fabricating a pseudo-random mask and covering it on the sensor's photosensitive area; selecting a time-compressed image resolution of M×L to be acquired; imaging the target scene on the sensor's photosensitive area; exposing the target scene and acquiring an image at the start time, with exposure ending at i=0; performing scan output, receiving and recording image data, and completing a line of image output; continuing to acquire an image after the photosensitive area is exposed, with exposure ending at i=i+1; if i≤L, outputting the next line of image until i>L, thereby obtaining a time-compressed image of the target scene.

The application discloses a kind of width quadratic gradient light cathode design methods applied to stripe transmission grating spectrometer, comprising the following steps: step S1: with the center of light cathode base as origin (0,0) establishes rectangular coordinate system, light cathode slit length direction is defined as x-axis direction, and light cathode slit width direction is defined as y-axis direction;Step S2: light cathode slit edge coordinates comply with quadratic function and, step S3: establish zero-level center x-axis coordinate of silk.This application has the beneficial effects that: by using width quadratic gradient light cathode design, the signal intensity distribution of X-ray streak camera light cathode can be controlled, the signal intensity difference between high-energy region and low-energy region in transmission grating dispersion spectrum is reduced, and the problem of high dynamic range requirement for X-ray streak camera is solved.