55 results about "Pixel detector" patented technology

A spectral sensing device and associated methods for enhanced diagnostic capabilities across medical fields are disclosed. The device incorporates multispectral, hyperspectral, and photoplethysmography technologies to analyze biological features including tongue, oral cavity, saliva, teeth, and other tissues. The system transforms any standard RGB camera into a multispectral imaging device by training machine learning models to associate RGB values with spectral values inside and outside the visible spectrum using measurements from a single pixel detector spectroradiometer. A multimodal neural network with separate processing branches analyzes spectral images, non-spectral images, and tabular data to predict microbiome composition. The system generates health risk assessments by comparing predicted microbial abundances to thresholds associated with various medical conditions. Near-infrared sensing enables blood flow monitoring, subcutaneous imaging, and assessment of physiological parameters. Convolutional neural networks enable spectral reconstruction without requiring the physical device, while supporting continuous monitoring in various form factors.

A radiation detector unit including an interposer configured to electrically connect a pixelated radiation sensor positioned on a front side of the interposer to an application-specific integrated circuit (ASIC) positioned on a back side of the interposer, where the interposer has at least one feature which equalizes the energy resolution (ER) response of edge and center pixel detectors of the pixelated radiation sensor within 10% of one another.

The invention discloses a DMD dynamic area activation three-dimensional imaging system based on camera visual positioning, and relates to the technical field of optics. Aiming at the problems of low activation efficiency, poor light spot adaptability and insufficient dynamic scene adaptation of an existing system DMD full panel, the position and the size of a laser light spot on a DMD panel are captured in real time through camera visual positioning, a micro-mirror area just surrounding the light spot is dynamically activated through image preprocessing, boundary extraction and coordinate mapping, and the laser light spot is accurately activated. A matched measurement matrix is generated according to the size of the activation area and is loaded to the DMD to realize spatial coded modulation, a single-pixel detector synchronously acquires modulation signals, a phase difference is calculated in combination with a four-step phase shift method, and a three-dimensional depth map is reconstructed. According to the method, DMD full panel activation is not needed, the micromirror utilization rate and imaging efficiency are remarkably improved, meanwhile, the three-dimensional imaging precision is guaranteed, and the method is suitable for industrial part detection, small and medium-sized target modeling and other scenes.

The invention relates to a three-dimensional semiconductor pixel detector and a manufacturing method thereof. A pre-prepared array carrier provided with a plurality of detection cavities arranged in an array is obtained, the inner surfaces of the detection cavities are provided with conductive layers, each detection cavity is internally provided with a central electrode of a detection pixel, the central electrodes are not in contact with the inner surfaces of the detection cavities, and the conductive layers are used as surface electrodes of the detection pixels; preparing a detection medium of a detection pixel in each detection cavity of the array carrier by adopting a preset low-temperature growth mode to obtain a three-dimensional semiconductor pixel detector comprising the array carrier and the detection pixel in each detection cavity; a detection medium in the detection cavity is located between the central electrode and the conductive layer; in each detection cavity, the detection medium surrounds the central electrode, and the surface electrode surrounds the detection medium. And the collection time of carriers can be greatly shortened, so that the saturation counting rate, the energy resolution and other performances are improved, the process is simple, the cost is low, and the applicable material range is wider.

The application discloses a multi-band infrared polarization selection photoelectric detection array and a preparation method thereof in the field of photoelectric devices, and the photoelectric detection array comprises a transparent insulating substrate, and array-distributed internal unit pixel detectors are arranged above the transparent insulating substrate, wherein the internal unit pixel detectors comprise a gate electrode, an insulating layer, an active layer, a source-drain electrode and a photosensitive layer, the gate electrode is arranged above the transparent insulating substrate, the gate electrode is covered with the insulating layer, the active layer is arranged above the insulating layer, and the photosensitive layer and the source-drain electrode are arranged above the active layer. The photoelectric detection array can be combined with a polarimetry instrument and a chemical analysis platform device in aspects such as component identification and concentration detection of a liquid solution; the design and preparation of the field effect transistor photoelectric polarization selection device can simultaneously cancel a polaroid, realize integration of polarization angle detection and wavelength absorption detection, and can monitor the component and the concentration of the solution in a characteristic waveband of the solution.

The application discloses a peak holding circuit of a pixel detector with adaptive matching leakage current function and relates to the field of semiconductor integrated circuits. The peak holding circuit is used to solve the problem that the voltage signal holding time is affected due to the limitation of the capacitor in the peak holding circuit. The positive input end of a voltage comparator is connected with the signal input end of the peak holding circuit, the reverse input end of the voltage comparator is connected with the voltage output end of a holding core circuit, the output end of the voltage comparator is connected with the current source control end of the holding core circuit, and the voltage output end of the holding core circuit is connected with the voltage input end of an adaptive leakage current matching circuit. When the positive input signal of the voltage comparator is greater than or equal to the reverse input signal, the holding core circuit adjusts the voltage value output from the output end to increase. When the positive input signal of the voltage comparator is less than the reverse input signal, the holding core circuit adjusts the voltage value output from the output end to remain stable, and the adaptive leakage current matching circuit adaptively matches the leakage of the output voltage of the holding core circuit.

The utility model discloses a kind of heat dissipation package structures of pixel detector chip module, it is related to heat dissipation packaging technical field, including DBC substrate and heat dissipation module;The pixel detector chip module includes adaptively connected pixel type detection sensor, connector and multiple processor chips, wherein, the pixel type detection sensor is set to DBC substrate front, the connector and multiple processor chips are set to DBC substrate back;The front of the heat dissipation module is provided with first boss, second boss and multiple bumps between first boss and second boss, and the back of DBC substrate is connected by first boss, second boss and multiple bumps with the heat dissipation module.The heat dissipation package structure has good heat dissipation capacity, and can better meet the heat dissipation demand when pixel type detector module works.

The application provides a single-pixel diffraction imaging method and device, and belongs to the field of coherent diffraction imaging and computational photography, wherein the method comprises the following steps: (1) in the single-pixel imaging light path, different modulation sequences are used to modulate the illumination light beam of the target scene, and a single-pixel detector is used to record the intensity value of a one-dimensional sequence; (2) the intensity value corresponding to the different modulation sequences is used to replace the amplitude value of the reconstructed diffraction light field on the detector plane, and then alternating iteration calculation is performed until the target scene is reconstructed. The application has the advantages of simple structure, strong operability, wide application range and strong expandability. Through the application, the cost of single-pixel diffraction imaging can be reduced, fast and accurate measurement of the target scene is realized, and convenience is brought to high-quality single-pixel imaging.

The invention belongs to the technical field of mid-infrared imaging, and discloses a mid-infrared two-photon calculation imaging system and method based on pumping space coding, and the method comprises the steps: carrying out the spatial intensity coding of near-infrared pumping light through employing a spatial light modulator; the intensity code of the pump light is mapped into the non-degenerate light by means of the nonlinear effect of the single-pixel detector, the detector outputs the integral intensity value of the non-degenerate signal related to the spatial intensity code, and the two-dimensional information of the object to be detected is reconstructed by combining the correlation algorithm. By means of the non-degenerate two-photon absorption effect of a single-pixel detector material, structural detection of a mid-infrared light field is achieved. Compared with direct modulation in a mid-infrared light field, the method has the advantages that the influence caused by a long-wave diffraction effect is effectively avoided, high-precision coding modulation is realized, and the physical pixel limitation of a traditional mid-infrared detector is effectively broken through. The invention has the technical advantages of high imaging sensitivity, fast time response, high modulation precision, large imaging field of view, wide response band and the like.

The invention provides a single-pixel imaging-free moving target positioning method, which comprises the following steps: S1, constructing a Gaussian mixture background model to detect a moving target and a background; s2, irradiating the digital micromirror device through a light source, and projecting the initial template pattern to the surface of a target scene; receiving the light beam reflected by the target to a single-pixel detector; s3, constructing a Kalman filtering prediction model, and predicting the position area of the target in the next frame; s4, dynamically matching the template in the prediction area, calculating SSIM values, positioning a position corresponding to the maximum SSIM value, and marking a target in a rectangular frame, namely a positioning result; and S5, updating the region corresponding to the maximum SSIM value into a new template, iteratively updating the Kalman filtering state, and realizing continuous tracking until the maximum frame number is reached. The method does not need a complex optical system and imaging equipment, reduces the system complexity, does not generate an image, and is suitable for a scene needing privacy protection.

The embodiment of the present application provides an imaging method and system. The imaging method comprises the following steps: using pseudo-thermal light as probe light, and irradiating the probe light to a moving object to form reflected light; receiving the reflected light by using a single-pixel detector, and determining a Doppler frequency shift distribution of the reflected light relative to the probe light by using a frequency analysis system; obtaining a velocity sequence of the moving object based on the Doppler frequency shift distribution of the reflected light relative to the probe light; and constructing a full-view velocity image and a spatial image of the moving object by using a pre-stored reference spatial thermal light field distribution and the velocity sequence based on a correlation imaging algorithm, wherein the spatial image corresponds to a reflectivity distribution of the moving object, the direction of the velocity of the moving object is perpendicular to the plane where the collection surface of the single-pixel detector is located, and the velocity sequence corresponds to the pre-stored reference spatial thermal light field distribution.

An example includes a method for producing a multipixel detector, the method including: providing a bottom layer including a first and a second bottom electrode, depositing an electrically insulating layer on the bottom layer, forming a first opening through the electrically insulating layer, depositing a first photon absorbing material in the first opening, forming a second opening through the electrically insulating layer, depositing a second photon absorbing material in the second opening, planarizing the deposited electrically insulating layer, the first photon absorbing material, and the second photon absorbing material to form a flat surface, and forming a common top electrode on top of the flat surface.

The application discloses a single light guide antenna pulse terahertz time-domain spectroscopy system and a detection method, and relates to the technical field of terahertz. The system comprises a laser pulse generation module, a single light guide antenna module, a compressed sampling module, a signal reconstruction module and a control unit. The application integrates a random light delay modulation unit and a single-pixel detector, realizes random time interval sampling of a terahertz signal, effectively breaks through the limitation of a traditional sampling mode, improves the flexibility and efficiency of signal acquisition, and combines a signal reconstruction module of an FPGA+GPU heterogeneous computing architecture. The system can adaptively construct a sparse base, accurately sparsely represent a measurement vector, and then efficiently reconstruct an original terahertz time-domain signal through an optimization objective function and an adaptive iterative solution algorithm. The application not only improves the accuracy of signal reconstruction, but also reduces the complexity of data processing, and provides strong support for the practical application of terahertz technology.

The invention provides a single-pixel imaging method and system based on an array light source coherent synthesis vortex light field, and the method comprises the steps: enabling a single path of laser to pass through a collimation beam expander, then carrying out the amplification, enabling the amplified laser to pass through a circular-ring-shaped arrangement mask plate to form an array light source, and then carrying out the emission and output; specific phases are loaded to different sub-apertures of the array light source through the spatial light phase modulator so as to realize light field modulation; performing far-field coherent synthesis to obtain a vortex light field with specific intensity distribution, and after the vortex light field irradiates a target object, recording a return light intensity detection value by a single-pixel detector; and obtaining a target object image based on the vortex light field intensity distribution and the return light intensity detection value in combination with a single-pixel imaging reconstruction algorithm. Compared with the prior art, the method has the advantages of being high in sampling speed, high in imaging quality, good in noise robustness and the like, and is expected to be widely applied to the field of long-distance target detection imaging.

The invention relates to the field of computational imaging, and particularly discloses a Fourier single-pixel imaging method based on space-time three-dimensional joint priori, which comprises the following steps: S1, Fourier spectrum measurement: projecting a sine structured light pattern to a dynamic target scene through a spatial light modulator, collecting a corresponding light intensity signal by using a single-pixel detector, and measuring the Fourier spectrum; fourier spectrum sampling data of the scene is obtained; wherein the sine structured light pattern generates a measurement value of a complex Fourier coefficient through phase shift technology combination; s2, constructing a reconstruction objective function: taking Fourier spectrum consistency of measurement data and a reconstruction result as a data fidelity constraint, and introducing space-time three-dimensional joint priori as a regularization item; the space-time three-dimensional joint priori comprises a 3D Hessian regularization item and a local low-rank time priori item; and S3, an optimization solution step. By adopting the technical scheme of the invention, high-fidelity reconstruction of a dynamic scene can be realized by simultaneously utilizing spatial structure priori and time redundancy information at an extremely low sampling rate.

The invention discloses a broadband spectrum microscopic system based on Fourier single-pixel simultaneous imaging, and relates to the technical field of UVA-near infrared two-region multispectral synchronous imaging. The system comprises a broadband spectrum light source, a microscopic module, a Fourier structured light generation device, a scattering medium homogenization module, a multi-channel narrow-band detector array, a multi-channel data acquisition system and a calculation imaging processing unit. By arranging and combining a plurality of narrow-band single-point detectors and combining the scattering effect of ground glass, efficient synchronous acquisition and space uniform distribution of UVA to near-infrared two-region multispectral signals are realized, and the problems of complex hardware, low time resolution, spectral crosstalk, incomplete view and the like in traditional multispectral imaging are solved. According to the system, the Fourier single-pixel imaging principle is utilized, through the synergistic effect of structured light coding and a single-pixel detector, the view field consistency of multispectral images is ensured on the hardware level, later registration is not needed, meanwhile, the system has high sensitivity, low cost and compactness, and the system is suitable for high-resolution wide-spectrum microscopic imaging in the fields of biomedicine, material science and the like.

The application provides a single-pixel imaging method and system based on array light source coherent synthesis vortex light field, which comprises the following steps: a single laser is enlarged after passing through a collimating and expanding mirror, and then is emitted and output after passing through a circular ring-shaped mask to form an array light source; specific phases are loaded on different sub-apertures of the array light source by a spatial light phase modulator to realize light field modulation; far field coherent synthesis is performed to obtain a vortex light field with a specific intensity distribution; after the vortex light field is irradiated to a target object, a back light intensity detection value is recorded by a single-pixel detector; and based on the vortex light field intensity distribution and the back light intensity detection value, and in combination with a single-pixel imaging reconstruction algorithm, an image of the target object is obtained. Compared with the prior art, the application has the advantages of fast sampling speed, high imaging quality, good noise robustness and the like, and is expected to be widely applied in the field of long-distance target detection imaging.

The application discloses a kind of drug production's associated imaging impurity detection method and system, it is related to drug impurity detection technical field.The method comprises the following steps: loading the first binary mask matrix, projecting target product area, controlling single-pixel detector to detect, determine the first measurement and light weight reconstruction into the first preview figure;Through pre-examination first preview figure, generate the second binary mask matrix and carry out projection and detection reconstruction, through multiple iterations until determine the Nth preview figure;From the temporary database of online detection platform, the first preview figure is retrieved until the Nth preview figure, multiple layer compressed sensing and reconstruction are executed, and the reconstruction result is determined;For reconstruction result, matching is carried out in impurity feature library, and impurity determination result is determined.The technical problem that the technical problem that the impurity detection efficiency is low and the detection accuracy is insufficient in the prior art in the production process of drug is solved, and the technical effect that the impurity of drug is efficiently and accurately detected in production link is achieved.

The invention relates to the crossing field of wavefront sensing and computational imaging, and provides a few-pixel wavefront sensing device and a few-pixel wavefront sensing method, aiming at solving the problem that the existing imaging technology has the advantages of wide spectral response range and single photon magnitude but is difficult to apply to a high-speed real-time imaging scene due to dependence on a continuous and repeated spatial modulation mechanism. According to the small-pixel wavefront sensing device based on the coding grating and the lens array, spatial wavefront information is efficiently and rapidly acquired by using a small-pixel detector, wavefront is spatially segmented, subspaces are sampled, required spatial coding modes are reduced, and parallel acquisition of data is realized at the same time; the problems that an array detector in a special wave band is expensive and difficult to obtain are solved, the detection efficiency under a low-light condition is improved, and the spectral range of wavefront sensing is expanded.

The invention discloses a single-pixel imaging semiconductor wafer surface defect extraction method and system, and relates to the technical field of wafer defect extraction, and the method comprises the steps: carrying out the dark current deduction and brightness flat field correction of a defect-free wafer bright field image, generating a reference mask, dividing tiles, and building coordinate mapping; generating a defect sensitive pattern pair, performing tile-by-tile projection, performing integral acquisition by using a single-pixel detector, and performing complementary difference to obtain a phase shift difference group; in-phase and orthogonal components are obtained through four-step phase shift phase locking demodulation, defect global coordinates are estimated according to the phase and frequency slope, and a frequency domain suppression weight is constructed through a defect-free image Fourier spectrum to obtain saliency; and the defect type is judged through self-adaptive adjustment of the distance between the emitting end and the tile and saliency secondary difference. According to the method, the in-phase / orthogonal component and amplitude-phase distribution are directly solved by adopting the four-step phase shift method, the defect coordinates are solved by using the phase-frequency slope, image reconstruction is avoided, the calculation overhead is reduced, and the positioning precision is improved.

The invention relates to a display device, an inspection method thereof, and an electronic device including the display device. The display device includes: a display panel including a plurality of pixels; a sensing circuit for generating sensing values of the plurality of pixels by sensing characteristics of the plurality of pixels; and a panel defect normalizer for compensating the sensing value, the panel defect normalizer comprising: a preliminary defect pixel detector for detecting preliminary defect pixels; a defective pixel detector for detecting defective pixels; a defect line detector for detecting a defect line; a defect line compensator for compensating a sensing value of the defect line; and a defective pixel compensator for compensating the sensing value of the defective pixel.

The invention provides a single-pixel imaging system for an underwater complex environment by combining a scattering model of light propagating underwater and single-pixel imaging. The method specifically comprises three processes of underwater single-pixel imaging system construction, underwater imaging mathematical modeling and speckle degradation prediction and reconstruction. According to the method, modeling is carried out on the underwater propagation process of projection speckles, then a degraded speckle pattern is predicted, an underwater object is coded by using a spatial light modulator, then intensity information of the coded object is acquired by using a single-pixel detector, and finally correlation reconstruction is carried out on a light intensity value and the predicted speckles. The imaging result is not influenced by underwater scattering and absorption, and the method and the system have remarkable advantages in the face of complex environment disturbance.

The invention discloses a single-pixel uniform imaging correction method and system based on a scanning mode and a medium, and the method comprises the steps: generating a one-dimensional Hadamard substrate pattern, carrying out the multi-line copying, and carrying out the convergence in a vertical direction through a cylindrical mirror, thereby obtaining a one-dimensional Hadamard substrate pattern; projecting a one-dimensional Hadamard substrate pattern as a one-dimensional illumination pattern; the stepping motor drives the target image and the one-dimensional illumination pattern to form relative motion, and scanning modulation is carried out, so that the one-dimensional illumination pattern scans the target image line by line; the single-pixel detector collects a light intensity signal reflected after being modulated by the target image; based on the collected light intensity signals, the two-dimensional target area image is reconstructed line by line through an image reconstruction program, and the image reconstruction program comprises Hadamard inverse transformation. By designing the uniformity correction method, the reconstruction process is improved, and the brightness uniformity of the reconstructed image is improved.

The invention provides a gesture recognition method and device based on adaptive Fourier single-pixel imaging and optimized ResNet deep learning. According to the method, a single-pixel detector, a DMD and a scene perception control module are adopted to construct a self-adaptive Fourier single-pixel imaging system, a gesture state is recognized by monitoring key Fourier coefficient changes, a sampling strategy, a modulation parameter and an imaging mode are dynamically adjusted, and a compressed sensing measured value is obtained; reconstructing a gesture image through a multi-constraint inverse Fourier transform algorithm fusing contour sparse constraint and frequency domain attention weight; constructing an optimized ResNet network comprising a hierarchical attention mechanism module, a multi-scale feature extraction module, a depth separable convolution module and a pyramid pooling module; training the network by adopting an improved strategy of a combined loss function, an AdamW optimizer and OneCycleLR learning rate scheduling; and finally, real-time gesture recognition is realized. The method has the characteristics of light hardware weight, low power consumption, strong environmental adaptability and high recognition precision, and can be widely applied to the fields of smart home, virtual reality, intelligent driving and the like.

The invention provides a cold mirror type water vapor concentration and dew point detection system and method based on single-pixel imaging, the cold mirror type water vapor concentration detection system based on single-pixel imaging comprises a mirror surface refrigeration module, a detection module and a control module, the detection system can distinguish phase change and pollutants in the mirror surface state detection process, the reliability is high, and the detection accuracy is high. According to the detection system, the low-cost single-pixel detector is combined with the spatial light modulator, an expensive and complex area-array camera and an optical lens group in a traditional scheme are replaced, the cost and the size of the system are remarkably reduced, and the reliability of water vapor concentration detection in the semiconductor low-dew-point environment is improved.

The invention relates to a terahertz single-pixel encryption metasurface and an encryption method thereof, the metasurface is composed of n * n units, and encryption operation is performed on a light field by using one unit at a time in a random sequence; after terahertz waves carrying image information pass through one unit of the metasurface, the light field phase of the terahertz waves can be modulated into spatial distribution of 0 or pi, and the terahertz waves are sequentially modulated by each unit of the metasurface and are collected by a single-pixel detector to obtain a single-pixel time sequence. The sequence and a secret key carrying the phase distribution and modulation sequence of each unit of the metasurface are subjected to correlation calculation, and image information is reconstructed. The terahertz single-pixel encryption metasurface is obtained, the terahertz metasurface encryption scheme has the safety of a 1090 key space by utilizing the characteristics of single-pixel imaging, the robustness that 97% of a shielding light path can still be reconstructed and 30% of fault tolerance are achieved, and a complex terahertz array detector is avoided.

The application discloses a kind of digital image correlation measurement method and system combined with single-pixel imaging and polarization suppression, belong to optical measurement and experimental mechanics field.The present application constructs the imaging module including light source, orthogonal linear polarizer, digital micromirror array and single-pixel detector for the problem that traditional DIC method is difficult to effectively suppress interference light under complex illumination.Measuring, Hadamard coding mode is projected to sample surface by digital micromirror array, and single-pixel detector is synchronously collected after the light signal filtered by orthogonal polarizer, and differential acquisition is carried out to positive and negative mode;After gray scale image is reconstructed using differential signal, PINN-DIC neural network is input to calculate the full-field displacement field and strain field of sample surface.The present application effectively suppresses interference light at image acquisition source by the synergistic effect of orthogonal polarization and single-pixel differential acquisition, significantly improves the anti-interference ability, precision and stability of DIC measurement under complex illumination environment.

The application discloses a kind of turbulent flame geometry three-dimensional tomography method and system based on multi-probe CGI, comprising: N single-pixel detector is arranged around flame to form multi-probe detection array, dynamic space illumination modulator is used to generate structured light field to illuminate flame, each detector synchronously acquires barrel detection signal;Through compressed sensing reconstruction algorithm combined with convex optimization solving method, flame two-dimensional projection image under each view angle is recovered;Using adaptive histogram equalization, combined with filtering method, the calculation ghost imaging noise is inhibited, and two-dimensional projection image preprocessing is realized;Based on multi-view geometric projection relationship, construct tomographic projection matrix, use algebraic reconstruction technique combined with full variation regularization iterative algorithm to solve three-dimensional voxel distribution, and the flame front geometry three-dimensional structure is reconstructed.The application uses single-pixel detector to replace traditional area array camera, with the advantages of low cost, strong ability to resist harsh environment, high time resolution, suitable for high space-time resolution three-dimensional measurement.

Dual-energy detection device (110;430), comprising: a first pixel detector arrangement (120) which, when the dual-energy detection device (110; 430) is used with a radiation source (410), is arranged proximal to the radiation source (410), wherein the first pixel detector arrangement (120) is configured to detect radiation source photons that have relatively low energy; and a second pixel detector arrangement (170) distal to the radiation source (410), wherein the second pixel detector arrangement (170) is configured to detect the radiation source photons, which have relatively high energy, that have passed through the first pixel detector arrangement (120); wherein the first pixel detector arrangement (120) comprises a plurality of rows of first pixel detectors, each first pixel detector of the first pixel detectors comprising a first sensitive medium (220), a first photosensitive device (150), a first plane of incidence (130) for the incidence of the radiation source (410) and a first window (140) coupled to the first photosensitive device (150), wherein the first plane of incidence (130) faces the radiation source (410); the second pixel detector arrangement (170) comprises a single row of second pixel detectors, each second pixel detector of the second pixel detectors comprising a second sensitive medium (320), a second photosensitive device (1100), a second plane of incidence (190) for the incidence of the radiation source (410) and a second window (180) coupled to the second photosensitive device (1100); and a pixel area of ​​every second pixel detector of the second pixel detectors is a multiple of a pixel area of ​​one of the first pixel detectors, wherein the first pixel detector arrangement (120) and the second pixel detector arrangement (170) are configured to detect X-ray photons at the megavolt level, characterized in that a mass thickness of the first pixel detector is selected to be 4 mm, and that a mass thickness of the second pixel detector is selected to be 30 mm.

The invention discloses a positron annihilation parameter spectrogram measuring system and method. The system comprises a positron source, n coding matrixes, a single-pixel detector and an atlas reconstruction module, the positron source is used for emitting an initial positron beam X to the coding matrix; the coding matrix is used for modulating the initial positron beam X to form a modulated positron source Y which is incident on a sample target; the single-pixel detector is used for detecting energy, time or direction of gamma photons generated after each modulated positron source enters the sample target to obtain a corresponding positron annihilation spectrum P and sending the positron annihilation spectrum P to the atlas reconstruction module; and the atlas reconstruction module is used for calculating positron annihilation spectrums Q of sample target areas corresponding to matrix elements allowing positron particles to pass through in each coding matrix according to the n positron annihilation spectrums P, and then generating a positron annihilation parameter spectrogram of the sample target according to a positron annihilation spectrum Q set.