2323 results about "Photon" patented technology

A chip package includes a housing, one or more electrical connections coupled to an exterior of the housing, a photonic integrated circuit, and a scanning unit. Both the photonic integrated circuit and the scanning unit are disposed within the housing. The photonic integrated circuit has at least one waveguide designed to guide a beam of light. The scanning unit is designed to laterally scan the beam of light across a focal plane outside of the housing. The scanning unit is aligned with the photonic integrated circuit such that the beam of light is coupled between the photonic integrated circuit and the scanning unit.

The invention discloses a switch cabinet discharge detection method and system, and relates to the technical field of power equipment state monitoring and fault diagnose.The light intensity attenuation rate and the vibration frequency are collected through a photonic crystal fiber, the concentration of decomposed gas is detected in combination with a Raman spectrum, and a space-time joint feature matrix is generated; performing space weight distribution on the space-time joint feature matrix based on the switch cabinet structure, and inputting the space weight to an RBF-SVM (Radial Basis Function-Support Vector Machine) to generate discharge type probability distribution; based on a high-frequency energy parameter and a gas decomposition concentration parameter in the spatio-temporal joint characteristic matrix, inputting the parameters into a multiple linear regression model, calculating an insulation aging index, and judging an insulation degradation grade according to a threshold value; the photonic crystal fiber is used for collecting the light intensity attenuation rate and the vibration frequency, the Raman spectrum is combined for detecting the decomposition gas concentration to generate the space-time joint characteristic matrix, synchronous monitoring of various physical and chemical parameters in the switch cabinet is achieved, and the accuracy and comprehensiveness of recognition of different types of discharge phenomena are improved.

The invention relates to the technical field of nuclear radiation imaging, in particular to a radiation array detector, a back scattering imaging system and a back scattering imaging method. The radiation array detector comprises an X-ray photon absorption structure which comprises high-strip-shaped scintillators and low-strip-shaped scintillators which are alternately arranged, the high-strip-shaped scintillators are used for detecting back scattering X-ray photons incident at all angles, the low-strip-shaped scintillators are used for accurately determining the incident direction of the X-ray photons through the collimation effect, and the high-strip-shaped scintillators and the low-strip-shaped scintillators are used for detecting the incident direction of the back scattering X-ray photons; after X-rays enter the photon absorption structure, the high-strip-shaped scintillators and / or the low-strip-shaped scintillators receiving X-ray photons generate scintillation photons. The silicon photomultiplier array is connected with the high strip-shaped scintillator and the low strip-shaped scintillator through a light guide and is used for converting scintillation photons into photoelectric signals; and the position and energy information coding circuit is used for carrying out position and energy information coding on the photoelectric signals generated by the silicon photomultiplier array. According to the invention, the detection efficiency and the direction identification capability of the back scattering X-ray can be effectively improved.

The invention provides a nonlinear data generation and processing method based on light quantum and a light quantum computer, and the method comprises the steps: obtaining a nonlinear function and attribute information of a nonlinear layer; according to the frequency spectrum number and the attribute information of the nonlinear function, constructing an initial light quantum circuit; measuring the initial light quantum circuit, and determining a target function corresponding to the initial light quantum circuit according to a measurement result; loss information of the target function is determined, whether the initial light quantum circuit is applied or not is determined according to the loss information, and if yes, the initial light quantum circuit serves as a target light quantum circuit; and performing operation on input data of the nonlinear layer based on the target light quantum circuit. According to the method, the low-energy-consumption characteristic of photon calculation, the nonlinear characteristic of light quantum calculation and the general programmable capability of electronic calculation can be fused, and high-energy-efficiency calculation can be carried out on input data of a nonlinear layer. In addition, the method also has the advantages that the complexity of a quantum circuit is smaller, and the participation of a nonlinear optical device is not needed.

The invention discloses a co-packaging type optical engine module and networking. The co-packaged optical engine module comprises a photonic integrated chip and a processor bare core, and the photonic integrated chip is stacked above the processor bare core and electrically connected with the processor bare core; the photonic integrated chip is configured to transmit and receive data in an optical signal mode, and an optical signal transmitting and receiving end of the photonic integrated chip is located on one side far away from the processor bare core; the processor die is configured to process the data. According to the scheme provided by the invention, intermediate substrates such as a silicon dielectric plate and an adapter plate are canceled, the transmission path is further shortened, the data transmission efficiency is improved, in addition, the signal loss can be remarkably reduced by the tight coupling, and the high-speed signal integrity is improved.

The invention provides a three-dimensional tracking method applied to a single-photon laser radar to detect a far-field dynamic unmanned aerial vehicle point target, and belongs to the technical field of laser radar detection and target tracking. The problems that in the prior art, under the long-distance condition, the target imaging size is smaller than one pixel, and a detection and tracking algorithm based on shape, texture or edge features fails are solved. The method comprises the following steps: constructing a six-dimensional state vector containing a three-dimensional position and a three-dimensional speed of a target; predicting a state vector according to a state transfer function containing air resistance and turning acceleration; and an extended Kalman filtering framework is utilized to update the predicted state and obtain state estimation of the target, and the extended Kalman filtering framework comprises a self-adaptive process noise adjustment mechanism based on innovation feedback and is used for adjusting a process noise covariance matrix on line. The method is mainly used in the field of detection and multi-dimensional tracking of airspace moving targets.

The invention provides an ICESat-2 turbid water area sounding correction and water depth inversion method based on optical characteristics of a water body. The method comprises the following steps: S1, obtaining photon data and an optical remote sensing image of a near-shore turbid water research area, and carrying out preprocessing operation on the data; s2, performing spectral sensitivity analysis by acquiring an ICESat-2 photon error value and combining optical characteristics of a water body; s3, constructing an ICESat-2 turbid water area sounding compensation model based on water optical characteristics, and selecting the model preferentially according to evaluation indexes; s4, synthesizing a multi-temporal image, and realizing model adaptive adjustment of different space weight distribution based on the spectral sensitivity difference of the turbid water area; s5, constructing an ICESat-2 and remote sensing image joint inversion water depth model based on turbidity partitioning; s6, spatial interpolation is carried out on a water depth inversion result, residual noise and adjacent pixel differences possibly occurring in the image are suppressed, and continuous water depth is obtained; according to the invention, large-range water depth inversion without field actual measurement work can be realized.

A method for secure quantum communication includes generating a photon. The method includes modulating at least two quantum state dimensions selected from the group consisting of orbital angular momentum (OAM), polarization, and phase of the photon to form a composite quantum state. The method includes directing the photon to an emission point on a helical structure having a defined spatial coordinate corresponding to classical data. The method includes emitting the photon from the emission point into a quantum channel. The composite quantum state and spatial coordinate together encode secure information.

The invention discloses a path planning method and device based on a photon pulse reinforcement learning network, and relates to the field of photon pulse reinforcement learning networks, and the method comprises the steps: adjusting the phase of each phase shifter in an explicit MZI network according to a multi-level pulse neural network, and configuring a weight matrix; carrying out pulse signal loading on the light source by using a light modulator to obtain an input signal; obtaining a plurality of linear calculation results by using the weight matrix and the input signal through an interference effect and a coupling effect; inputting the plurality of linear calculation results into the DFB-SA laser, and obtaining a nonlinear activation result by adjusting the injection current of a gain region of the laser and the reverse bias voltage of a saturation region of the laser; and taking the nonlinear activation result as a new input signal, and returning to the step of obtaining a plurality of linear calculation results by using the weight matrix and the input signal until calculation of all levels in the pulse neural network is completed, so that path planning which is high in speed, low in power consumption and easy to configure is realized.

The invention discloses a cable accessory nondestructive testing method based on image recognition, and relates to the technical field of data encryption, and the method comprises the steps: extracting a photon signal from an anti-noise coding control template, generating an anti-interference partial discharge light spot image in combination with a compressed sensing reconstruction algorithm, and carrying out the alignment fusion of the anti-interference partial discharge light spot image and LiDAR point cloud data of a cable accessory, generating spatial registration feature data; based on the neural radiation field network, constructing a three-dimensional radiation field model, inputting spatial registration feature data, generating time-space domain deformation field data and partial discharge hot spot distribution data, and generating a defect candidate region by using a spatial weighted fusion algorithm; a deep residual network is used as a framework, a transfer learning strategy is combined, a cable accessory defect model is constructed, a defect candidate area is input, and a cable accessory health state report is generated. According to the method, the three-dimensional radiation field model is constructed by using the neural radiation field network as a framework, accurate positioning and characterization of defects are realized, the detection reliability is improved, and the method is suitable for micro-defect identification.

The invention relates to the technical field of chip preparation, and provides a chip based on an annular photonic crystal and a preparation method thereof. The preparation method comprises the following steps: growing a nucleating layer on a substrate; growing a superlattice structure on one side, away from the substrate, of the nucleating layer; sequentially growing an n-type coating layer, an n-type waveguide layer, a quantum well and a p-type electron blocking layer on one side, deviating from the nucleating layer, of the superlattice structure; etching a plurality of annular cavities on the p-type electron barrier layer to form an annular photonic crystal; growing a p-type extension contact layer on one side, deviating from the quantum well, of the p-type electron blocking layer; and carrying out in-situ annealing treatment. According to the preparation method, the directivity of the photonic band gap can be effectively adjusted, uniform light waves in all directions on the side face can be formed, so that leakage of laser from a non-light-emitting area on the side face is restrained, the light emitting efficiency is improved, the annular photonic crystals are periodically distributed, and the light beam quality is effectively guaranteed.

The invention discloses an adaptive energy calibration method for a Timepix3 detector, and belongs to the field of plasma diagnosis, and the method comprises the steps: collecting a photon event through a detector, the photon event comprising arrival time, coordinates and energy information; sorting the photon events according to the arrival time of the photon events to obtain a sequence; mapping the sequence to an empty matrix in a time window sliding mode, searching and recording the area of a pixel cluster and the sum of count values, and compensating the count values according to a set threshold value; classifying according to the area of the pixel cluster, summing the counting values of the pixels in the pixel cluster to obtain the volume of the pixel cluster, and drawing a statistical histogram of the volume of the pixel cluster to form an energy spectrum; identifying an energy peak of each energy spectrum and performing Gaussian fitting, calculating a peak abscissa, and establishing a relationship between the volume of a pixel cluster and actual energy; and completing energy calibration by utilizing linear fitting of volume energy data of multiple groups of pixel clusters. According to the invention, the requirements for setting parameters such as radioactive source intensity, detector threshold, exposure time and the like are reduced.

The invention discloses a non-volatile phase shifter which is ultra compact and low in loss. In the non-volatile phase shifter, signal light is transmitted to the composite hybrid waveguide through the input waveguide and is modulated after passing through the phase change material area of the composite hybrid waveguide, and the phase change material is directly modulated through spatial light, so that the phase of the signal light is modulated. According to the invention, optical pulses with different pulse widths and different powers can be used, and the phase state of the phase change material can be regulated and controlled. The problems of large size area and high power consumption required by electro-optical regulation and control, thermo-optical regulation and control and the like are solved, pi phase shift can be realized in an interaction length as low as several microns, and meanwhile, relatively low loss is kept. According to the invention, the phase change material is regulated and controlled through spatial light, so that the distinguishable level up to 8 bits can be realized, and hyperfine phase regulation and control in an ultra-small structure can be realized. According to the invention, an excellent phase shifter design scheme can be provided for realizing complex photon circuits with ultra-compactness, ultra-low power consumption, low loss and the like.

An opto-electronic device having a plurality of layers, comprising a first capping layer (CPL) comprising a first CPL material and disposed in a first emissive region configured to emit photons having a first wavelength spectrum that is characterized by a first onset wavelength; and a second CPL comprising a second CPL material and disposed in a second emissive region configured to emit photons having a second wavelength spectrum that is characterized by a second onset wavelength; wherein at least one of the first CPL and the first CPL material (CPL(m)1) exhibits a first absorption edge at a first absorption edge wavelength that is shorter than the first onset wavelength; and at least one of the second CPL and the second CPL material (CPL(m)2) exhibits a second absorption edge at a second absorption edge wavelength that is shorter than the second onset wavelength.

Systems and methods are provided for time resolution of signals produced by the emission of energy. More particularly, systems and methods are provided for measuring distance using photons propagating in a scattering medium to produce multi-dimensional, measurements of objects in a media and / or the media itself by virtue of the character of light spatially scattered and absorbed in the media resulting from the transmission of light into the media, such transmitted light having some temporal character that distinguishes it from background light, e.g., ambient sources. A method for obtaining terrestrial LiDAR data generally includes: providing a LiDAR system moving traverse to a ground canopy; emitting light pulses from the LiDAR system toward the ground canopy and terrain such that the light pulses reflect therefrom; and receiving the reflected light pulses at the LiDAR system; wherein the LiDAR system includes a monolithic module comprising a photonic device, a sampling module, a digitizing module, and a readout integrated circuit (ROIC).

A method for processing a radar signal based on a photonic fractional Fourier transformer comprises: transmitting a linear frequency modulation signal to targets to be detected, receiving echo signals of the targets to be measured, and loading the linear frequency modulation signal and the echo signals onto a single-frequency optical wave by an electro-optical modulator (S1); respectively biasing a sub-modulator and a parent modulator of the electro-optical modulator at different bias points, modulating the single-frequency optical wave by the electro-optical modulator based on the linear frequency modulation signal and the echo signals, and outputting a modulated optical signal (S2); converting the modulated optical signal by a photoelectric detector to a photocurrent (S3); and performing Fourier transform on the photocurrent to obtain a fractional Fourier spectrum, and obtaining distance information of the targets to be measured according to peak positions of each pulse signal in the fractional Fourier spectrum (S4).

The invention relates to the technical field of laser radars, in particular to a laser radar near-field saturation suppression method and device based on signal splicing. The method comprises the following steps: transmitting a pulse laser beam and receiving a scattering echo signal, dividing the echo signal into a transmission light signal and a reflection light signal through an intensity beam splitter prism, and respectively obtaining a far-field channel photon profile and a near-field channel photon profile through the transmission light signal and the reflection light signal; fusing and splicing the far-field channel photon profile and the near-field channel photon profile to obtain a corrected distance square signal profile; and performing atmospheric detection by using a laser radar system, and inverting atmospheric parameters by correcting a distance square signal profile. Meanwhile, the invention discloses a device for executing the method, by adopting the laser radar near-field saturation suppression method and device based on signal splicing, the problem of near-field signal saturation of a high-power laser radar can be effectively solved, and the overall performance index of the laser radar is greatly improved while the detection precision is guaranteed.

The invention discloses a shallow sea area water depth inversion method based on a satellite-borne laser radar, and particularly relates to the technical field of single-photon water depth information extraction. The denoising method comprises the following steps: S1, data preprocessing: reading data, carrying out visual presentation, dividing photons into offshore photons, sea surface photons and undersea photons, and intercepting an effective photon region; s2, coarse denoising: denoising the area intercepted in the step S1 by adopting a DBSCAN (Density Based Spatial Clustering of Applications with Noise) algorithm; s3, fine denoising: screening effective signals of sea surface photons by adopting a Gaussian fitting algorithm, removing sea photons, separating subsea photons from the sea surface photons, performing density analysis on the subsea photons, extracting a density peak point, and constructing a density trend curve of the subsea photons by adopting a cubic spline interpolation method, eliminating residual noise deviating from normal distribution according to the trend curve; and S4, performing water depth inversion: performing refraction correction on the subsea photons subjected to fine denoising, fusing the corrected subsea photons and the sea surface photons subjected to fine denoising, and generating a water depth distribution diagram of the shallow sea area.

The invention discloses a vortex beam orbital angular momentum detector based on surface plasmon and a detection method, and belongs to the field of micro-nano photonics and photoelectric detection. The detector is based on a plane photoelectric detector of a metal-semiconductor-metal type, a vortex light field beam splitting structure is arranged on a metal electrode on one side of the detector or between two metal electrodes, the vortex light field beam splitting structure comprises an incident coupling grating, an incident light field carrying different orbital angular momentums can be split into plasmons in different directions, and the plasmons in different directions can be split into a vortex light field. The single detector resolution of the orbital angular momentum of the vortex beam is realized through the direction and propagation loss difference of plasmons. The detector is compatible with an existing semiconductor technology, the structure is simple, vortex light beams carrying high-order orbital angular momentum can be detected, and the rotation direction of a vortex light field can be detected.

The embodiment of the application provides an optical amplifier, an optical assembly, an optical module, an optical communication network system and a detection device, relates to the technical field of semiconductors, and is used for solving the problem of one-way light emission of the optical amplifier. The optical amplifier comprises a waveguide and a photonic crystal. The waveguide comprises a core region and a cladding region arranged at the periphery of the core region. The waveguide further comprises an incident light side, a first light emission side and a second light emission side. The photonic crystal is arranged in the cladding region of the waveguide. The core region is located between the incident light side and the first light emission side, and the photonic crystal is located between the second light emission side and the core region. The photonic crystal is used for receiving incident light from the incident light side and emitting first emitted light and second emitted light. The first emitted light is emitted from the first light emission side, and the second emitted light is emitted from the second light emission side.

The invention relates to the technical field of quantum, and particularly discloses a physical structure and function exploration method of a light quantum chip based on an e-p-n quantum entangled state basic particle model. Related quantum characteristics are brand-new interpreted based on the e-p-n quantum entangled state basic particle model, and the physical structure and function exploration method of the light quantum chip based on the e-p-n quantum entangled state basic particle model is established based on the e-p-n quantum entangled state basic particle model. The method comprises the following steps: researching basic modules of a light quantum chip, including generation of light quantum, formation of light quantum bits, a light quantum storage and reading scheme, linear optical quantum calculation, a light quantum chip control module, a substrate material of the light quantum chip and the like, and carrying out deep analysis on a light quantum chip technology; and the color, the luminous intensity, the spatial relative position and the like of an object can be judged due to the capability, and the method can be applied to the fields of visual automatic driving and the like.

Methods, devices and systems are described that enable improved determination of wavefront errors associated with light traveling through turbulent media, such as through the atmosphere. The described systems use a Rayleigh-Raman polychromatic laser guide star (RRPLGS) to measure the tilt at the wavelength of observation by making use of the dispersion of the refractive index of air and differential tilt measurements at multiple combinations of wavelengths based on the Rayleigh and Raman back-scattered light. The described RRPLGS systems have a number of advantages, including scalability of returned flux and flexibility in selection of short wavelengths, allowing for a combination of multiple tilt measurements, and enabling characterization of the turbulent media without relying on photons from the object of interest.

The invention belongs to the technical field of microwave photon links, and particularly relates to a high-resolution microwave photon frequency measurement system based on real-time Fourier transform. The link comprises a mode-locked laser, a first dispersion compensation module, a second dispersion compensation module, a dual-drive Mach-Zehnder modulator, a Mach-Zehnder modulator, a dispersion optical fiber, a time lens, an erbium-doped optical fiber amplifier, a photoelectric detector and an oscilloscope; the mode-locked laser outputs femtosecond Gaussian light pulses, and the femtosecond Gaussian light pulses are injected into the first dispersion compensation module and then stretched into chirp light pulses; modulating the chirp light pulse through electro-optical modulators which are connected in parallel; the modulated optical signal is subjected to time amplification processing through a dispersion optical fiber, a time lens, a second dispersion compensation module and an erbium-doped optical fiber amplifier in sequence; and the optical signal after time amplification processing is converted into a microwave pulse carrying frequency information of the signal to be detected by a photoelectric detector, and the microwave pulse is observed by an oscilloscope.

The invention discloses a stepped three-band grating coupler and a reverse optimization method thereof, and belongs to the technical field of photonic devices and integration, and the reverse optimization method comprises the steps: determining a design target of the grating coupler, and defining an initial structure; defining optimization parameters including grating height and grating width according to the grating number; defining an optimization quality factor according to a design target of the grating coupler, and dynamically updating a weight coefficient of the quality factor; optimizing the width and height distribution of all gratings by using an improved direct binary search algorithm; and iterative optimization is continuously carried out until a design target is achieved, and width distribution corresponding to gratings with different heights in the optimized stepped grating structure is obtained. The problem that traditional grating diffraction has inherent wavelength dependence is effectively solved, and efficient coupling of three optical communication wavebands is achieved.

The invention discloses a multi-photon phase detection method, device and system based on closed-loop quantum coherence and clock transition, and aims to solve the problems that the working frequency of an existing atom sensor is limited and the existing atom sensor is easily interfered by amplitude noise. According to the method, a closed ring is constructed in an atomic medium by applying a light field, a working alternating-current magnetic field and an auxiliary alternating-current magnetic field. The sum of the working frequency and the auxiliary frequency is set to be equal to the transition frequency of the first-order magnetic insensitive clock of the atom, so that decoupling of the working frequency to be measured and the inherent frequency of the atom is realized, and continuous tuning can be performed in a broadband range from Hertz to gigahertz. To-be-measured phase information is carried in a global phase of a closed loop, and is extracted by measuring an optical response signal and performing synchronous demodulation. According to the scheme, the self-consistency of the closed loop phase and the stability of clock transition are utilized, the influence of driving field amplitude noise and environment magnetic field fluctuation is effectively restrained, and the method is suitable for the fields of high-precision electromagnetic detection, broadband communication and the like.

The invention discloses a two-photon interference method. A built two-photon interference system comprises a light source device, a first adjusting branch, a second adjusting branch, a coupling device and a detection device. The light source device is capable of outputting a first single-photon signal and a second single-photon signal. Based on the established two-photon interference system, the optical path of a second single-photon signal can be adjusted through a second adjusting branch, and the polarization state of a first single-photon signal can be adjusted through a first adjusting branch, so that the two single-photon signals meet interference conditions, and the coincidence counting rate of two beams of optical signals output by a coupling device can be obtained through a detection device. And two-photon interference can be simply and quickly realized.

The invention provides a single photon and visible light image fusion method and system based on a multi-scale Markov random field model, and belongs to the technical field of multi-modal image fusion. In the long-distance target ranging and imaging process, a multi-sensor fusion method is used, the high resolution advantage of a visible light intensity image is utilized, the problems that a single-photon laser radar is small in point cloud density and low in image resolution are effectively solved, and the sensing capacity of the single-photon laser radar for scene target information is effectively enhanced; by using the fusion method based on the multi-scale Markov random field model, the structural consistency and the anti-interference capability are enhanced, global structural deviation or local overfitting under a single scale is effectively avoided, and the method is suitable for image fusion under multi-modal and complex scenes.

Systems and methods for optically sensing medicament concentrations within medicament delivery devices are disclosed. A medicament delivery device can include a fluid path comprising a reservoir in fluid communication with an outlet port, in which the device is actuatable to drive fluid through the fluid path, from the reservoir and out of the outlet port. A sensor assembly of the delivery device is configured to determine concentration of an analyte in the fluid. The sensor assembly includes an optical emitter configured to emit photons towards a fluid sample within the fluid path, an optical detector configured to receive photons passed through and / or reflected from the fluid sample and provide a detector signal, and one or more signal processing components configured to receive the detector signal and, based at least in part on the detector signal, provide an indication of the analyte concentration in the fluid sample.

An optical frequency generation system (100), comprising: - reference atoms (7) in a gas phase, - an interrogation laser source (1) configured to emit an interrogation signal (101) comprising a first optical frequency suitable for exciting a two-photon transition in said reference atoms (7), said interrogation signal (101) being configured to interact with said reference atoms (7) in a Doppler-free scheme; - optical frequency modulation means (31, 31a, 31b) configured to adjust said first optical frequency and to modulate said first optical frequency at a first modulation frequency f1; - an optical sensor (9) configured to detect a fluorescence signal (110) from said reference atoms (7); - a first control loop (10) configured to lock said first optical frequency to a resonance frequency of said two-photon transition, said fluorescence signal (110) being input into the first control loop (10); - a mitigation laser source (2) configured to emit a mitigation signal (102) comprising a second optical frequency selected to produce a light-shift of said two-photon transition of opposite sign of the light-shift produced by the interrogation signal (101); characterized in that the optical frequency generation system (100) further comprises: - optical amplitude modulation means (5) configured to modulate the amplitude of the interrogation signal (101) and of the mitigation signal (102) at a second modulation frequency f2, and - a second control loop (20) configured to adjust the relative amplitude of the mitigation signal (102) with respect to the interrogation signal (101) such as to cancel the effective light-shift of the combined interrogation (101) and mitigation (102) signals.

The invention discloses an infrared focal plane detector nonlinear calibration and parameter calculation method based on flat field data, which comprises the following steps: collecting flat field and dark field sequences at different integration times, and calculating a group mean value and a group difference for each pixel; fitting a linear baseline by using a low-brightness area, constructing a ratio sequence, representing deviation of a mean value by using a quadratic multiplicative model, and linearizing a measurement signal of a pixel; counting the covariance of the pixel and the neighborhood offset of the pixel in each integration time, fitting to obtain a space coupling model changing along with a mean value, and adding back the variance dispersed by the neighborhood to obtain a corrected variance; photon transfer curve fitting is carried out on the corrected variance-mean value data, and pixel-by-pixel gain and readout noise are obtained; pixel response heterogeneity is calculated on the highlight unsaturation and the flat field, and the full-well charge and the dynamic range are deduced according to the saturated DN value. According to the invention, key parameters of pixel-by-pixel gain, readout noise, PRNU, full-well charge, dynamic range and the like can be stably obtained.