165 results about "Pixel detector" patented technology

The invention discloses a special environment laser radar system and method based on polarization modulation and laser coding. The laser radar system comprises a polarization modulation laser emitting unit, a multi-channel receiving unit and a compressed sensing reconstruction unit. The polarization modulation laser emission unit comprises a laser, a beam expanding module, a spatial light modulator, a micro galvanometer array, a spatial filter and a first focusing lens which are arranged in sequence; the multi-channel receiving unit comprises a second focusing lens, a polarization beam splitter and a single-pixel detector array which are arranged in sequence; and the compressed sensing reconstruction unit comprises a compressed sensing processing module, an image reconstruction module and a loop adaptive control module which are arranged in sequence. The anti-interference capability in a complex environment is enhanced through polarization modulation, the detection resolution and the signal-to-noise ratio are improved in combination with laser coding, the imaging quality and stability of the laser radar in a special environment are greatly improved, and the method can be widely applied to the fields of military reconnaissance, disaster rescue, unmanned driving and the like.

The invention relates to the technical field of hyperspectral imaging, in particular to a single-pixel hyperspectral imaging method and device based on time domain stretching. The method comprises the following steps: broadband signal light passes through a sample to be detected to obtain two-dimensional image information and one-dimensional spectral information, a mask pattern is generated by using a spatial light modulation module, and spatial coding modulation is performed on the signal light carrying the sample information; the broadband signal light subjected to space coding is effectively collected through a multimode optical fiber, different space frequency components are homogenized, then time stretching is conducted through a time stretching module to achieve separation of different wavelengths in the time domain, and time domain information of signal pulses is recorded through a single-pixel detector; time is mapped back to a frequency spectrum through the accurate corresponding relation between the signal light frequency and the time delay amount, and a hyperspectral image is obtained according to the known mask sequence and the signal intensity corresponding to different wavelengths in combination with an association algorithm. According to the technical scheme, high-spectral imaging with high speed, high spectral resolution and high sensitivity can be realized.

The invention provides a single-pixel detection device with a flexible and variable measurement view field, and an optical detection system and method. The single-pixel detection device comprises a view field diaphragm, a focusing lens and a single-pixel detector, the view field diaphragm is arranged in a detection light path of the measured target, is a view field diaphragm with a flexible and variable measurement view field, can automatically adjust the shape of the measurement view field according to the shape of the measured target, obtains the measurement view field completely matched with the shape of the measured target, and outputs an output light beam with the same shape as the measured target; and the focusing lens is arranged in an output light path of the field diaphragm and is used for focusing an output light beam of the field diaphragm to the single-pixel detector, so that the single-pixel detector detects a signal of the detected target. According to the single-pixel detection device with the flexible and variable measurement view field and the optical detection system provided by the invention, the view field diaphragm is introduced into the detection light path, and the measurement view field of the view field diaphragm can be flexibly adjusted, so that flexible, simple and accurate single-pixel detection on measured targets with different shapes in optical detection is realized.

The invention discloses a pulse terahertz time-domain spectroscopy system of a single photoconductive antenna and a detection method, and relates to the technical field of terahertz, the system comprises a laser pulse generation module, a single photoconductive antenna module, a compression sampling module, a signal reconstruction module and a control unit; by integrating the random light delay modulation unit and the single-pixel detector, the system realizes random time interval sampling of terahertz signals, 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, so that the system has a wide application prospect. The system can adaptively construct a sparse base and perform accurate sparse representation on a measurement vector, so that an original terahertz time domain signal is efficiently reconstructed by optimizing a target function and an adaptive iterative solution algorithm, the signal reconstruction precision is improved, the data processing complexity is also reduced, and the method is suitable for large-scale popularization and application. And powerful support is provided for practical application of the terahertz technology.

The invention provides a single-pixel imaging-free target positioning method, which comprises the following steps of S1, alternately loading a template pattern and a pure white pattern to the same position in a digital micromirror device by a computer, and respectively projecting the template pattern and the pure white pattern to an object pattern; s2, the light beam projected to the surface of the object is received by a single-pixel detector after being matched and reflected; and S3, constructing a target positioning model based on a genetic algorithm and template matching, dividing two single pixel values, and normalizing to serve as a new matching function for improving the template matching algorithm. S4, the genetic algorithm optimizes the fitness value obtained by each time of matching until the maximum number of iterations is reached or the solution with the highest fitness value is found; and S5, displaying the position of the template through the corresponding coordinate of the solution with the highest fitness value obtained in the matching process, and obtaining a to-be-positioned target. The algorithm and the system are both low in complexity, and meanwhile, compared with traditional template matching positioning, the method has higher operation speed.

A spectrometer for detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, a method of detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, and a method of constructing the spectrometer. The method comprises the steps of creating dispersed images of an entrance aperture on a plane of an exit aperture, such that respective images at the different wavelength components are offset by different amounts of displacements along a direction of dispersion; gathering a first EM wave energy incident on the entrance aperture to an EM detector; gathering a second EM wave energy that exits the exit aperture to the at least one single-pixel detector; and measuring the output of the EM detector and the output of the at least one single pixel detector for reconstructing the EM wave spectrum taking into account an intensity distribution of an incident EM wave on the entrance aperture.

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.

The invention belongs to the technical field of computational imaging, and particularly relates to a physical information hybrid constraint-based parallel convolution single-pixel detector imaging method, which comprises the following steps of: S1, prefabricating a coding matrix by using a Hadamard matrix as a two-dimensional structured modulation light field; s2, obtaining one-dimensional light intensity coding information of a target scene through the output voltage of the single-pixel detector, carrying out parallel matrix, and establishing a parallel convolutional neural network model; s3, constructing a physical information constraint equation used for optimizing convolution parameters of the parallel convolutional neural network model; and S4, determining a physical information hybrid constraint condition, optimizing a convolution kernel of the parallel convolutional neural network model, and obtaining a target scene image. According to the method, neural network model parameters can be minimized in the imaging process of the single-pixel detector, the number of iterations is reduced, the imaging time is shortened, real-time single-pixel imaging under physical information driving is achieved, and the single-pixel detector can have higher imaging quality at a low sampling rate by introducing physical mixed constraints.

The invention relates to the technical field of X-ray imaging, and provides a novel dual-energy detector and scanning equipment. The novel dual-energy detector comprises a plurality of first pixel detector assemblies, a second pixel detector assembly and a filtering assembly, the first pixel detector assembly, the filtering assembly and the second pixel detector assembly are sequentially arranged in the X-ray propagation direction, the pixel size of the first pixel detector assembly is smaller than that of the second pixel detector assembly, the first pixel detector assembly is used for receiving low-energy X-rays, and the filtering assembly is used for filtering the low-energy X-rays. And the second pixel detector assembly is used for receiving the high-energy X-rays filtered by the filtering assembly. The pixel size of the first pixel detector assembly is set to be smaller than the pixel size of the second pixel detector assembly, so that the imaging penetration rate can be improved.

The invention belongs to the technical field of imaging, and particularly relates to a single-pixel imaging reconstruction method and device based on compressed sensing. The core of the method is to construct an FRSPINet network architecture based on deep learning. The method comprises the following steps: firstly, constructing a cascade network model composed of a data preprocessing module, a deep separable convolution module, a full connection module, a shallow feature extraction module, an attention mechanism module and an image reconstruction module; carrying out gradient optimization on network parameters through multi-stage iterative training, dynamically adjusting a learning rate based on convergence of an SSIM loss function, and storing optimal weight parameters; in an imaging stage, a compression measurement value of a target scene is obtained through a single-pixel detector in a preset sampling mode, and after the compression measurement value is transmitted to a computing terminal through a data acquisition card, the compression measurement value is input into a pre-trained FRSPINet network for end-to-end nonlinear mapping, and finally a high-fidelity reconstructed image is output. And the image reconstruction quality and the system robustness at a low sampling rate are effectively improved.

The invention belongs to the technical field of computational imaging, and particularly relates to an ultraviolet single-pixel computational optical imaging system based on quantum dot down-conversion. The system comprises an ultraviolet emission module, an ultraviolet down-conversion module, a spatial light coding module and a single-pixel imaging module. Under the condition of unique photoelectric characteristics of the quantum dots, high-efficiency wavelength conversion in a wide spectrum range can be realized, so that ultraviolet wavelength is converted into visible light wavelength; based on a digital micromirror array spatial light modulator, binary phase modulation can be performed on light, so that light coding information is transmitted; based on a single-pixel imaging technology, imaging with a wider dynamic range and higher sensitivity can be realized. Compared with a traditional area array detection imaging mode, the method has the advantages that only one single-pixel detector without spatial resolution is used for recording image information, and imaging can be carried out under the complex conditions of low illumination and scattering of a detection path.

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.

A high-speed CMOS pixel detector is provided, which includes a plurality of super pixel modules, where each super pixel module includes an array of N×M super pixel cells and a digital readout logic circuit connected to the N×M super pixel cells, and data is output between the super pixel modules via asynchronous control logic; and peripheral modules, including at least an EoC module, a peripheral readout module, and a peripheral data transmission module connected in sequence, where the EoC module is connected to the super pixel modules. This application adopts a structure in which a plurality of super pixel cells are integrated, allowing for upgrading of a serial sparse readout mode to a parallel sparse readout mode, thereby greatly improving a readout rate, enabling a plurality of pixels to share resources, and reducing pixel dimensions.

Provided in the present disclosure are a system and method for measuring the volume fraction of soot in a flame on the basis of single-pixel imaging. The system comprises: an LED collimating light source; a spatial light modulator, which modulates a light signal generated by the LED collimating light source; a burner, which is configured for producing a flame; an imaging unit, which focuses and projects an image light beam; an optical screen, which images and reflects the image light beam that has passed through the position where the flame is located; a single-pixel detector, which is configured for respectively receiving a first luminous intensity detection signal and a second luminous intensity detection signal in the presence and absence of the flame; and a computer, which is configured for performing Fourier transform on the first luminous intensity detection signal and the second luminous intensity detection signal so as to respectively obtain a first Fourier transform spectrum and a second Fourier transform spectrum, performing two-dimensional inverse discrete Fourier transform on the first Fourier transform spectrum and the second Fourier transform spectrum to respectively obtain a first image and a second image, calculating the transmissivity on the basis of the luminous intensities of the first and second images according to RDG-PFA theory, then using a deconvolution method to obtain a local light extinction coefficient, and calculating the local volume fraction of soot.

The invention discloses a correlated imaging impurity detection method and system for drug production, and relates to the technical field of drug impurity detection. The method comprises the following steps: loading a first binary mask matrix, projecting a target product area, controlling a single-pixel detector to detect, determining a first measurement value, and performing lightweight reconstruction to obtain a first preview; generating a second binary mask matrix and performing projection and detection reconstruction by pre-checking the first preview, and performing multi-round iteration until an Nth preview is determined; calling the first preview to the Nth preview from a temporary database of an online detection platform, executing multi-layer compressed sensing and reconstruction, and determining a reconstruction result; and aiming at a reconstruction result, matching in an impurity feature library, and determining an impurity verification result. The technical problems of low impurity detection efficiency and insufficient detection accuracy in the medicine production process in the prior art are solved, and the technical effect of efficient and accurate online detection of medicine impurities in the production link is achieved.

A depth image sensing device includes a line memory configured to store depth data, in units of a line group, generated by detecting a dot pattern light reflected from a scene, a dot center pixel detector configured to determine a dot center pixel having a highest intensity of depth data in each of a plurality of kernels included in the line group, and a dot data memory configured to store dot center pixel information including a position of the dot center pixel.

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 invention provides a radio frequency marking axial single-time rapid imaging device and method. The radio frequency marking axial single-time rapid imaging device comprises a detection light source, a radio frequency marking unit and a sample axial excitation detection unit, the radio frequency marking unit carries out radio frequency marking on each spectral component in the detection light beam emitted by the detection light source to obtain the detection light beam after radio frequency marking; the sample axial excitation detection unit comprises an objective lens and a single-pixel detector, the objective lens adopts a dispersion objective lens, each modulated spectral component in the detection light beam after radio frequency marking is focused to different depths in the axial direction of the sample, and signal light generated at each depth is simultaneously detected by the single-pixel detector at a time. According to the radio frequency mark axial single-time fast imaging device and method, fast axial imaging can be achieved within a large depth range, and meanwhile axial random fast imaging is achieved.

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 invention belongs to the technical field of object imaging, and particularly relates to an imaging method of a rotating object. The imaging method comprises the following steps that a rotating picture with the duration T of an imaging target is intercepted, the rotating picture is equally divided into a plurality of equal time periods according to the time interval delta t, and the duration T is larger than the duration of one circle of rotation of the imaging target; imaging the picture in each time period by adopting a plurality of different modulation signals, and acquiring an intensity value of reflected light through a single-pixel detector; calculating a one-dimensional projection curve of the imaging target in each time period according to the intensity value and the modulation signal; arranging the one-dimensional projection curves in different time periods according to time to obtain a projection curve time change diagram of the imaging target; and establishing an angle projection curve according to the time interval delta t, the rotation speed of the imaging target and the projection curve time change diagram, and performing back projection to realize imaging of the rotation target. According to the invention, the rotating object can be effectively imaged.

The invention discloses a single-pixel non-vision-field imaging system and a super-resolution reconstruction method thereof, belongs to the field of optical systems, and aims to solve the problems in the prior art. The system comprises a light source, a DMD (Digital Micromirror Device), a plane mirror, a plano-concave lens, an object to be measured, a shielding object, a plano-convex lens, a plane mirror, a single-pixel detector, a data collector and a computer; the DMD, the plane mirror, the plano-concave lens, the plano-convex lens, the plane mirror and the single-pixel detector are coaxially arranged; light beams emitted by the light source are modulated by the DMD, illumination speckles preset by a computer are projected, the speckles are reflected to the plano-concave lens through the plane mirror and then irradiate the surface of an object to be measured through the plano-concave lens, and transmitted light is converged by the plano-convex lens after being reflected by the shielding object, then reflected by the plane mirror and finally captured by the single-pixel detector. The single-pixel detector transmits collected data to the data collector, the data collector transmits the data to the computer for processing, and finally a target image is reconstructed.

The invention provides an ultra-small-pixel large-aperture wide-area high-resolution optical system and a design method. The ultra-small-pixel large-aperture wide-area high-resolution optical system comprises a concentric spherical lens and a large-aperture secondary imaging optical system array, the array comprises a plurality of large-aperture secondary imaging optical units and a plurality of super-large-target-surface small-pixel detectors. The secondary imaging optical units are arranged on any spherical surface which takes the center of the concentric spherical lens as the sphere center after the spherical primary image surface corresponding to the concentric spherical lens, overlapping areas exist between view fields of the secondary imaging optical units, and any three adjacent secondary imaging optical units are arranged in an isosceles triangle; the field angle of the edge of the mechanical aperture of each secondary imaging optical unit relative to the sphere center of the concentric spherical lens is smaller than the transverse maximum field angle and the longitudinal maximum field angle between two adjacent secondary imaging optical units in the secondary imaging optical system array. According to the system, high-resolution and large-field-of-view imaging can be realized, and meanwhile, the assembly and adjustment difficulty caused by too many arrays can be reduced.

The invention discloses a detector in-orbit calibration polarization X-ray source and a test system thereof. The detector in-orbit calibration polarization X-ray source is characterized in that the detector in-orbit calibration polarization X-ray source comprises a radioactive source used for generating X-rays and emitting the X-rays to a film; the film is used for exciting the incident X-ray to generate the X-ray with set energy, and the X-ray is incident to the diffraction crystal; the radioactive source box is used for installing a radioactive source and a film; the diffraction crystal is used for performing Bragg diffraction on incident X-rays to generate polarized X-rays and enabling the polarized X-rays to enter the collimator; the crystal box is used for installing a diffraction crystal; the collimator is used for collimating the incident X-ray and limiting the emergent direction of the polarized X-ray; and the vibration source structure assembly is used for installing the radioactive source box, the crystal box and the collimator. According to the invention, polarized X-rays with different energies within 2-8keV can be generated, the beam divergence angle is less than or equal to 1 degree, and the bandwidth is lt; and the voltage is 200 eV. The method can be used for monitoring the polarization performance and stability of the gas pixel detector.

The invention relates to the technical field of terahertz wave single-pixel imaging, and discloses a real-time terahertz wave single-pixel imaging method, device and system and computer equipment, and the method comprises the steps: obtaining a terahertz wave single-pixel measurement value of a to-be-imaged object; the terahertz wave single-pixel measurement value is a one-dimensional signal obtained by measuring an object to be imaged through a terahertz wave single-pixel detector; and inputting the terahertz wave single-pixel measurement value into a pre-constructed image reconstruction model to obtain a terahertz wave reconstruction image of the object to be imaged. Through the deep neural network model based on physical guidance, the reconstruction quality and reconstruction time of the terahertz wave image under the under-sampling condition can be effectively improved, and through the real-time terahertz wave single-pixel imaging device with a high-speed switch, the relation between the imaging speed and the imaging quality is effectively balanced, and the imaging quality is improved. And the reconstruction efficiency of real-time terahertz wave single-pixel imaging is further improved.

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.

A high-speed CMOS pixel detector is provided, which includes a plurality of super pixel modules, where each super pixel module includes an array of N×M super pixel cells and a digital readout logic circuit connected to the N×M super pixel cells, and data is output between the super pixel modules via asynchronous control logic; and peripheral modules, including at least an EoC module, a peripheral readout module, and a peripheral data transmission module connected in sequence, where the EoC module is connected to the super pixel modules. This application adopts a structure in which a plurality of super pixel cells are integrated, allowing for upgrading of a serial sparse readout mode to a parallel sparse readout mode, thereby greatly improving a readout rate, enabling a plurality of pixels to share resources, and reducing pixel dimensions.

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.