21 results about "Streak camera" patented technology

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 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 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 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.

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.

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 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.

The application belongs to a kind of fringe camera readout system, aiming at the technical problems that the direction adjustment of current fringe camera readout system is difficult to quickly locate the area with the best imaging quality, and lacks the adjustment margin of other directions except axial adjustment, provides a four-degree-of-freedom coupled fringe camera readout system and use method, including image readout unit, axial movement base body, rotating base body and rotating ring, first connecting structure, second connecting structure and third connecting structure are adjustable connecting structure, the first connecting structure is used to adjust the position of image readout unit in X direction relative to first adjusting seat, the second connecting structure is used to adjust the position of first adjusting seat in Z direction relative to second adjusting seat, and the third connecting structure is used to adjust the position of axial movement base body in Y direction relative to rotating base body.The application can realize four-degree-of-freedom adjustment, greatly improve the test efficiency, reduce the test time and processing cost.

The application discloses a streak image converter tube specific wave band quantum efficiency improving method and a streak image converter tube, and belongs to the technical field of fusion diagnosis and high-energy physics ultrafast diagnosis. In view of the problem that the quantum efficiency of the existing S20 photocathode is low in the blue-green wave band and restricts the detection sensitivity of the streak camera, a medium-metal composite metasurface structure with a subwavelength periodic arrangement is prepared on a cathode incident window, the guided mode resonance effect is used to couple the incident light to a photoelectric emission layer efficiently, and the light absorption and photoelectric conversion efficiency in the target wave band are enhanced. The metasurface structure is composed of a hexagonal grid-shaped distribution circular hole array formed by etching in a silicon dioxide window and an aluminum oxide medium column filled in the hole, and the structure parameters are determined by strict electromagnetic simulation optimization. The quantum efficiency of the cathode adopting the metasurface structure is improved from 14.34% to 19.09% in the 480 nm wave band, the integral sensitivity is improved from 170 mu A / lm to 289 mu A / lm, and the sensitivity of the streak image converter tube in the specific diagnostic window is improved.

This invention discloses a microscopic transient angle-resolved reflection / transmission spectroscopy measurement system based on a streak camera, belonging to the field of microscopic angle-resolved spectroscopy measurement. The invention includes a reflection excitation optical path, a transmission excitation optical path, a collection optical path, and a microscopic illumination module. The reflection / transmission excitation optical path converts a pulsed laser source into a broadband pulsed white light source and focuses it onto the sample surface. The collection optical path achieves time resolution through a streak camera, angle resolution through a pinhole on the k-space plane, and wavelength or energy resolution through a grating. The microscopic illumination module illuminates the sample to determine its position. This invention can acquire transient angle-resolved spectra at different times, analyze the ultrafast dynamics of angle-resolved spectra, and simultaneously acquire information in three dimensions: time, angle, and wavelength. By analyzing the light signal from these three dimensions, it can comprehensively analyze the sample's response to the excitation light and thus determine the coupling state between light and matter in the sample.

The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses a kind of based on stripe camera's ultrafast compression holographic imaging system and method, it is related to holographic imaging technical field.The application discloses

This application relates to the field of image processing technology, specifically providing a method and related equipment for improving the detection sensitivity of a streak camera. The method includes: acquiring multiple frames of background and signal-containing images from the streak camera under the same imaging conditions; determining a standardized sequence for each pixel; for each pixel, extracting statistical features from the standardized sequence to construct a pixel-level statistical feature tensor; concatenating the pixel-level statistical feature tensor and noise conditional features to form a pixel-level joint feature vector; constructing a U-Net network incorporating residual learning; and enhancing and reconstructing the pixel-level joint feature vector based on the trained U-Net network to obtain the enhanced result. This application, after pixel-by-pixel statistical modeling and normalization of background noise, uses the pixel-level statistical feature tensor and pixel noise standard deviation as network conditional inputs, allowing the enhancement intensity to adaptively adjust with the noise level, achieving strong noise suppression and weak signal enhancement while preserving structural details.

Systems and methods are provided for ultrafast light field tomography (LIFT), a transient imaging strategy that offers a temporal sequence of over 1000 and enables highly efficient light field acquisition, allowing snapshot acquisition of the complete two, three or four-dimensional space and time. The apparatus transforms targets in object space into parallel lines in the image plane with a cylindrical lens. Beam projections are optionally directed through a Dove prism and an array of cylindrical lenslets to an imaging device such as a SPAD camera, streak camera and CCD camera. By using an array of cylindrical lenslets oriented at distinct angles, enough projections are obtained simultaneously to recover the image with a single snapshot. The time-resolved system and methods were adapted to LIDAR, hyperspectral, non-line-of-sight, and three-dimensional transient imaging.

This invention relates to the field of fluorescence lifetime imaging, and discloses a wide-field fluorescence lifetime imaging system and method based on a streak camera. The system includes an excitation source, a wide-field excitation module, a synchronous detection module, and a synchronous matching module. The wide-field excitation module is positioned along the transmission path of a pulsed laser. The synchronous detection module includes a collection and beam splitting component, a reference camera, and a streak camera component. The input end of the collection and beam splitting component receives the fluorescence beam emitted by the sample, and the output end of the component splits the fluorescence beam into a first detection optical path and a second detection optical path. The reference camera is positioned in the first detection optical path, and the streak camera component is positioned in the second detection optical path. The synchronous matching module is electrically connected to the excitation source, the reference camera, and the streak camera component, respectively. This invention avoids the complex optical encoding scheme and resulting fluorescence photon loss problems of traditional DMD systems, and eliminates the need for complex reconstruction algorithms, thus improving imaging efficiency.

The present application relates to a kind of dynamic performance calibration system for the slow scanning gear of streak camera, mainly for solving the technical problems that the method of existing extension light path is more complex, usually needs to extend more than 60 meters, experimental platform occupies too large area, it is difficult to realize, and it will lead to high light intensity attenuation.The light pulse output by the laser enters the output imaging of streak camera in the dynamic performance calibration system for the slow scanning gear of streak camera, and the electric pulse signal output by the laser enters the digital delay under the slow scanning gear, the digital delay adjusts the electric pulse signal, so that the trigger signal after adjustment is kept in synchronization with the light pulse, and the image output by streak camera is read by camera and analyzed.The present application also provides a kind of dynamic performance calibration method for the slow scanning gear of streak camera.

The invention discloses a single-shot shock wave speed measurement system and method with time sequence calibration capability, and the system comprises a target chamber, a probe laser generation module, a time sequence calibration target, an interferometer, a streak camera, a focusing lens, a time mark laser introduction module, and a plurality of main laser generation modules. In the time sequence calibration process of the single-shot shock wave speed measurement system, a customized time sequence calibration target is used for reflecting a main laser signal and a probe laser signal in the same light path, a focusing lens is used for improving the signal-to-noise ratio, and meanwhile, a special time mark laser transmission assembly is used for introducing a time mark laser signal into a slit of a streak camera; therefore, a main laser signal, a probe laser signal and a time mark laser signal can be simultaneously obtained in single-shot measurement, and in-situ precise calibration of a time sequence of a speed measuring instrument corresponding to any reflecting surface is realized.

The invention discloses a high-time-resolution wide-energy-region X-ray spectrum quantitative measurement system and method. The high-time-resolution wide-energy-region X-ray spectrum quantitative measurement system and method have the beneficial effects that quantitative diagnosis of wide-energy-region (0.2 keV-5. 0keV) and high-time-resolution (lt, 40ps) X spectrum is realized by combining a height pair transmission type grating (TG), an X-ray streak camera (XSC) and a flat response radiation flow detector (FXRD), and the time resolution of the system is superior to that of an existing soft X-ray energy spectrometer (-200ps). Compared with an existing time-resolved transmission grating spectrometer, the system realizes quantitative measurement of the wide-energy-region X-ray spectrum intensity evolution process.

The invention discloses a streak camera image distortion test system and method under a dynamic condition, and solves the technical problems that sampling points of an existing image distortion test method are not rich enough, and the influence of streak camera image distortion cannot be accurately evaluated. The test system comprises a pulse signal source, a first pulse light source, a second pulse light source, a spatial modulation unit and an objective lens, the pulse signal source is used for enabling the to-be-detected streak camera to synchronously work with the first pulse light source or the second pulse light source; the first pulse light source emits laser pulses at equal time intervals to a slit of the streak camera to be measured; the second pulse light source emits a planar light pulse, the planar light pulse passes through the spatial modulation unit to generate a pattern of which the light intensity in the spatial direction is periodically changed, and the pattern is imaged to a slit of the streak camera to be measured after passing through the objective lens; the pulse signal source, the first pulse light source and the light beam modulator form a time direction distortion test system; the pulse signal source, the second pulse light source, the spatial modulation unit and the objective lens form a spatial direction distortion test system.

The invention relates to a streak camera signal processing method, in particular to a streak camera signal restoration method, and solves the technical problem that high-time-resolution streak camera restoration signals are difficult to obtain at single-pixel sampling intervals in the prior art. The method comprises the following steps: 1) determining a scanning response function r (k) of the streak camera; 2) obtaining a scanning response matrix R of the streak camera; 3) obtaining a simulation column matrix X; 4) obtaining a streak camera scanning prediction signal Y according to the scanning response matrix R and the column matrix X; the method comprises the following steps of (1) obtaining an actual scanning signal Y'of the streak camera, (6) calculating a correlation coefficient: if the correlation coefficient is greater than 90%, executing the step (7), otherwise, returning to the step (1) to obtain a scanning response function r (k) of the streak camera again, and (7) obtaining a new output image by using the streak camera, obtaining a row matrix Y ''according to the new output image, and restoring an input signal Xr of the streak camera by combining Y = (RX) T.

The invention discloses a high-spatial-resolution magnetic bottle type photoelectron spectroscopy measurement system and method and an attosecond streak camera, and solves the problem that an existing magnetic bottle type photoelectron spectrometer is poor in spatial resolution capability. The solenoid is used for providing a uniform low-intensity magnetic field, the photoelectron detector is located in the solenoid, and the strong magnet is located outside the solenoid and used for providing a local high-intensity magnetic field. The solenoid, the strong magnet and the photoelectron detector are all located in a vacuum environment; a plurality of photoelectron inlets which are arranged in an array mode are formed in a pipe opening of the solenoid and penetrate through the interior and the exterior of the solenoid; the detection surface of the photoelectron detector is opposite to the plurality of photoelectron inlets; the small end of the strong magnet is opposite to the solenoid pipe opening, and the strong magnet is used for enabling the motion trail of the to-be-detected photoelectron between the small end of the strong magnet and the solenoid pipe opening to point to the photoelectron detector. According to the invention, the spatial resolution capability of the photoelectron spectroscopy measurement system is improved.