24 results about "Quantum imaging" patented technology

The invention discloses a chip surface defect visual detection method and system, and the method comprises the steps: carrying out the high-sensitivity imaging through the dynamic adaptation of a quantum imaging enhancement module to the surface reflectivity, and achieving the sparse efficient processing of a defect signal through the combination of event-driven vision and a pulse neural network; based on a risk thermodynamic diagram generated in real time, intelligently scheduling detection precision and speed resources, and utilizing multi-modal feature decoupling and a federal knowledge graph to accurately associate defects and process roots; the digital twinning module synchronously predicts a defect evolution path and drives online adjustment and optimization of process parameters, and meanwhile the dynamic compensation module corrects optical defocus in real time. According to the invention, full-detection coverage of nanoscale defects is realized, a defect transfer chain is actively blocked while the detection efficiency is improved, and the chip manufacturing yield and reliability are remarkably improved.

A method for imaging an object illuminated with natural light including arranging an optical filter in an optical path of at least a portion of the natural light that is reflected and / or refracted or scattered from the object; arranging an optical detector in an optical path of light at least one of reflected from and / or transmitted through the optical filter; detecting, using the detector, individual photons for a time period to provide a times series of individual photon events; segmenting the time series into a plurality of bins; determining a number of detected photons within each bin to provide a time series of photon counts per bin; replacing and / or reconfiguring the optical filter a plurality of times followed by detecting, segmenting and determining to obtain a plurality of times series of photon counts per bin; and forming an image of the object based on the plurality of times series.

The invention provides an adaptive coincidence gate width optimization quantum imaging method based on a scattering free path. Firstly, pump light pumps a PPKTP crystal, and an entangled photon pair is generated through the SPDC process; then, separating the photons by using a PBS (Phosphate Buffer Solution), transmitting the photons along a reference light path and a signal light path containing a scattering environment respectively, and acquiring a photon arrival time sequence by a corresponding detector; thirdly, simulating a transmission process of signal photons in a scattering environment based on a Monte Carlo method, calculating a total scattering free path, counting the number of photons of each pixel point under different scattering times, and further screening out the optimal scattering times with the maximum number of photons; then, calculating a delay inequality according to a minimum total scattering free path corresponding to the optimal number of scattering times, and determining a self-adaptive coincidence gate width in combination with a fluctuation range of the total scattering free path; and finally, correcting a signal photon arrival time sequence by using the delay inequality, completing pixel-by-pixel coincidence counting based on the corrected time sequence and the coincidence gate width, and obtaining a quantum grayscale image through linear mapping.

This invention relates to the field of quantum imaging technology and proposes a digital phase-locked microwave magnetic field imaging system and method based on diamond NV centers. This invention images microwave fields based on the principle of power-broadened magnetic resonance. The system consists of multiple subsystems: an excitation optical path, an imaging optical path, an acquisition system, and a bias magnetic field. The excitation light is used to excite the diamond NV centers; the imaging optical path captures the fluorescence changes during microwave exposure; the acquisition system controls the testing system and analyzes data through a programmed host computer; and the bias magnetic field splits the resonance peaks to increase the bandwidth of the measured microwave field. Furthermore, imaging at different resolutions can be achieved by changing the objective lens. This invention enables non-destructive, non-invasive measurement of microstrip lines at room temperature using the NV center ensemble, thereby analyzing their operating status. In practical applications, this method offers advantages such as high sensitivity and rapid imaging.

The application belongs to the technical field of quantum imaging of computational imaging, and specifically discloses a correlation imaging reconstruction algorithm based on a deep convolutional hybrid neural network, which uses a Hadamard matrix gray scale coding sequence to replace a Gaussian matrix speckle sequence of original correlation imaging, and adjusts a digital micromirror device with a fixed sequence of speckle sequences in data acquisition and processing of correlation imaging. Under the same sampling rate, the algorithm can reconstruct a high-quality target object image, and has higher PSNR and SSIM values. Deep learning realizes end-to-end image recovery of an image in the algorithm implementation of correlation imaging, and reduces the steps of image calculation.

This invention relates to a quantum imaging system based on deconvolution that penetrates scattering media, belonging to the field of optical imaging. The invention addresses the problem of image distortion caused by interference from scattering media in quantum imaging. The system comprises a beam emitter, a beam receiver, and a scattering medium. The beam emitted by the beam emitter travels through the scattering medium to the surface of the imaging target, then reflects off the target surface and penetrates the scattering medium again. The echo beam is received by the receiving optics and used for imaging. First, the beam emitter uses a spatial light modulator to generate a point source beam, and the beam receiver obtains the point spread function of the quantum imaging system penetrating the scattering medium. Then, the beam emitter uses the spatial light modulator to generate an orbital angular momentum beam, and the beam receiver obtains the distorted image of the quantum imaging system penetrating the scattering medium. The point spread function and the distorted image are input together into a deconvolution module for calculation, reconstructing the target image hidden behind the scattering medium.

The invention relates to the technical field of medical devices, in particular to an LED mouth lamp with a variable light spot and a single spectrum, which comprises a bracket, an adjusting mechanism for positioning adjustment is arranged at the front end of the bracket, the adjusting mechanism comprises a transverse assembly for transverse adjustment and a longitudinal assembly for longitudinal adjustment, and the transverse assembly and the longitudinal assembly are arranged on the bracket. Two mutually symmetrical flexible supporting plates are arranged on the inner side of the adjusting mechanism, a detection mechanism used for adjusting and detecting the oral cavity is arranged on the inner side of the adjusting mechanism, the detection mechanism comprises an adapting assembly used for adapting to the oral cavity, and the detection mechanism further comprises a detection assembly used for adjusting steering detection; through deep adaptation of the single-spectrum LED lamp body and the quantum imaging technology, the difference between a lesion area and normal tissue in quantum light scattering and absorption coefficients is enhanced by utilizing the specific effect of the single spectrum on oral tissues, so that the pathological characteristics of quantum patterns are clearer.

The invention belongs to the technical field of quantum information, and relates to a non-detection photon imaging system based on a single optical fiber integrated nonlinear waveguide. Comprising a continuous tunable pumping laser source, an optical amplifier, an adjustable optical attenuator, a first beam splitter, a first adjustable optical delay line, a first polarization controller, a second polarization controller, a first optical circulator, a nonlinear straight waveguide, a second optical circulator, a first optical filter, a second optical filter, a third optical filter, a fourth optical filter, a third optical circulator, a second adjustable optical delay line and an optical absorption terminal. The system comprises a first light collimator, a first lens, a three-dimensional scanning platform, a second lens, a second light collimator, a second beam splitter, a third polarization controller, a fourth polarization controller, a first single-photon detector, a second single-photon detector and a coincidence measurement unit. Compared with a traditional non-detection photon imaging system, quantum imaging of a transparent object can be achieved only through half of resource expenditure, and robustness is provided for the imaging system through all-fiber integrated configuration.

The application discloses a quantum correlation imaging system based on a microlens array, which comprises a transmitter, a receiver, a comprehensive control system and an image inversion system; a light source unit of the transmitter outputs a two-mode vacuum squeezed state, which is divided into a mode A light field and a mode B light field. The mode A light field remains in the local, and the mode B light field returns to the receiver after acting on a target, the receiver performs time synchronization and coincidence measurement on the mode A and B light fields under the transceiving synchronization control of the comprehensive control system, and delivers detection results to the image inversion system. The image inversion system inverts the intensity image of the target by using a high-efficiency data processing algorithm. The comprehensive control system is used for transmitter output control, receiver coincidence measurement control, clock synchronization and real-time communication. The application realizes a quantum imaging system with high energy collection efficiency, can be used for fast imaging of dark and weak targets in a strong background, and can also be applied to medical imaging of biological tissues with low damage threshold.

The present invention relates to the field of quantum imaging technology, and more specifically, to a system and method for quantum imaging through scattering media based on light modulation and a genetic algorithm. The system and method include a generation and measurement unit, an optimization and shaping unit, and a verification and evaluation unit. The system modulates a spatial light modulator using a modulation signal to obtain initial modulated light, measures the initial modulated light using a detector, and obtains an initial image. The maximum and minimum values ​​of the intensity distribution of the initial image are obtained from a histogram of the initial image, and the contrast of the initial image is calculated based on the maximum and minimum values ​​of the intensity distribution of the initial image. An objective function is then defined based on the contrast value of the initial image. A control center introduces a genetic algorithm based on the objective function to optimize the initial modulation signal to find a modulation signal that maximizes the difference between bright and dark areas in the intensity distribution of the initial image, and calculates the peak signal-to-noise ratio of a final image generated corresponding to the modulation signal to evaluate the imaging quality.

A method for imaging an object illuminated with natural light including arranging an optical filter in an optical path of at least a portion of the natural light that is reflected and / or refracted or scattered from the object; arranging an optical detector in an optical path of light at least one of reflected from and / or transmitted through the optical filter; detecting, using the detector, individual photons for a time period to provide a times series of individual photon events; segmenting the time series into a plurality of bins; determining a number of detected photons within each bin to provide a time series of photon counts per bin; replacing and / or reconfiguring the optical filter a plurality of times followed by detecting, segmenting and determining to obtain a plurality of times series of photon counts per bin; and forming an image of the object based on the plurality of times series.

The invention discloses a multi-dimensional device dismantling risk identification and prevention and control method, and relates to the field of risk identification systems. Comprising the steps of constructing a device information quantum database, formulating a risk prevention and control scheme by using a risk assessment model, and monitoring quantum state change of the device, dynamic evolution of a microstructure and quantum parameter fluctuation in the environment in real time by means of a quantum sensor network. By constructing a quantum database, applying a quantum optimization algorithm, deploying a quantum sensor network and other multi-dimensional quantum technology applications, atomic-scale accurate identification and dynamic prevention and control of the device dismantling risk are realized. Specifically, atomic-scale structure details are obtained by using a quantum imaging technology, a risk assessment model is optimized in combination with a quantum annealing algorithm, and the accuracy and efficiency of risk prediction are significantly improved; based on a protective barrier of a quantum regulation and control principle and a pollutant treatment technology, the quantum tunneling risk is effectively inhibited, and quantum-level decomposition of pollutants is realized.

The invention discloses an ophthalmology quantum imaging method, system and device and a storage medium. The method comprises the following steps: firstly, acquiring quantum imaging scanning original data in a specified data format; then, the original data are analyzed and processed through a written special image reconstruction program, and a high-resolution and high-contrast eye tissue tomography image is generated; further, an advanced image processing algorithm is adopted to perform noise reduction and enhancement on the image, noise is effectively suppressed, and the signal-to-noise ratio of the image is improved; and finally, implementing three-dimensional reconstruction based on a plurality of cross-sectional images, displaying the three-dimensional structure of the eye tissue, and providing a visual and three-dimensional morphological basis for clinical diagnosis. The invention further comprises a system and device for implementing the method and a storage medium. Based on the quantum imaging technology and the image processing and reconstruction algorithm, high-resolution and high-signal-to-noise-ratio imaging of the eye tissue is achieved, the method is applied to eye quantum imaging, and a more reliable image tool is provided for early diagnosis and physiological research of ophthalmic diseases.

The application belongs to the technical field of quantum information, and relates to a non-probing photon imaging system based on a single optical fiber integrated nonlinear waveguide, which comprises a continuously tunable pump laser source, an optical amplifier, an adjustable optical attenuator, a first beam splitter, a first adjustable optical delay line, a first polarization controller, a second polarization controller, a first optical circulator, a nonlinear straight waveguide, a second optical circulator, first, second, third and fourth optical filters, a third optical circulator, a second adjustable optical delay line, an optical absorption terminal, a first optical collimator, a first lens, a three-dimensional scanning platform, a second lens, a second optical collimator, a second beam splitter, a third polarization controller, a fourth polarization controller, a first single-photon detector, a second single-photon detector and a coincidence measurement unit. Compared with a traditional non-probing photon imaging system, the application can realize quantum imaging of a transparent object by using only half of the resource consumption, and the all-optical fiber integrated configuration provides robustness for the imaging system.

The invention provides a nanoscale resolution vector electric field imaging device, and relates to the field of quantum imaging. The vector electric field imaging device comprises a quartz tuning fork which is movably arranged relative to the upper surface of a to-be-tested sample and is configured to perform simple harmonic vibration along a first direction; the probe is fixedly arranged on the lower surface of the quartz tuning fork and is configured to perform simple harmonic vibration along the first direction along with the quartz tuning fork, and an NV color center is carried in the probe; the microwave radiation module is configured to emit microwave pulses to the probe when the probe is located at the highest point or the lowest point of simple harmonic vibration, so that the NV color center accumulates phase information; the fluorescence acquisition module is configured to send laser to the probe and acquire fluorescence excited by the NV color center to obtain a fluorescence signal; and a processing module configured to perform vector electric field imaging based on the fluorescence signal.

Systems and methods described herein relate to implementing quantum imaging. In one embodiment, method includes forming a first substrate that is optically transparent and electrically conductive; forming a second substrate, residing on the first substrate, that is optically transparent and electrically insulative; forming a first borophene nanoribbon array electrically coupled to a first electrode, both residing on the second substrate; forming a third substrate, residing in the second substrate, that is optically transparent and electrically insulative; and forming a second borophene nanoribbon array electrically coupled to a second electrode, both residing on the third substrate.

The invention provides an enhanced quantum-induced coherent imaging system and method, and belongs to the technical field of quantum optics and photoelectric imaging, and the system comprises a seed light injection type bidirectional pumping quantum light source module which is used for generating a signal light beam and an idler frequency light beam with high coherence; the seed light injection type bidirectional pumping quantum light source module comprises a pumping light source, a seed light source, a nonlinear medium, a beam splitting unit, a beam combining unit and a reflecting unit. Seed light emitted by the seed light source and pump light emitted by the pump light source are combined at the beam combining unit and jointly enter the nonlinear medium to induce to generate a stimulated parametric down-conversion process, and a signal light beam and an idler frequency light beam are output. And the beam splitting unit is arranged at the downstream of the light path and is used for separating the signal light beam from the idler frequency light beam. According to the method, the inherent advantages that ZWM quantum imaging is high in environmental noise resistance, does not need to conform to measurement and the like are reserved, and the contrast ratio of interference fringes is greatly improved; and the bottleneck of short coherence length in the traditional scheme is effectively solved.

Provided is a quantum imaging device. The device includes a first light source configured to generate first light, a first photon pair generation part configured to generate a first entangled photon pair using the first light, a first beam splitter configured to separate the first entangled photon pair into a first signal idler and a first signal line, a first detector configured to receive the first signal idler, a first mirror configured to provide the first signal line to a target, a second detector configured to receive the first signal line transmitted or reflected to the target, and a signal processor connected to the first and second detectors and configured to obtain a target image by comparing a measurement image with a reference image.

The invention discloses a ghost imaging system based on adjoint particles, belongs to the technical field of quantum imaging and particle detection crossing, and aims at solving the problems that a traditional particle imaging system is high in cost, limited in precision and complex in architecture. The system comprises a neutron source, a barrel-type detector, a high-precision alpha particle detector array and a data processing and reconstruction unit, a D-T neutron source is preferably selected as the neutron source, and alpha particles in the direction close to 180 degrees are generated when neutrons are emitted; the barrel-type detector does not need spatial resolution capability and only measures total energy deposition and flux fluctuation of neutron beams; the alpha particle detector array collects three-dimensional information of alpha particles (x, y, t) to construct a space illumination mode; and the data processing unit reconstructs modulation information of an object on the neutron beam and generates an image by calculating a second-order correlation function of an alpha particle position mode and neutron flux fluctuation. Hardware configuration is simplified, cost is reduced, imaging precision is improved through particle quantum correlation, and the method is suitable for the fields of medical imaging, material analysis and nuclear technology application.

A method for imaging an object illuminated with natural light including arranging an optical filter in an optical path of at least a portion of the natural light that is reflected and / or refracted or scattered from the object; arranging an optical detector in an optical path of light at least one of reflected from and / or transmitted through the optical filter; detecting, using the detector, individual photons for a time period to provide a times series of individual photon events; segmenting the time series into a plurality of bins; determining a number of detected photons within each bin to provide a time series of photon counts per bin; replacing and / or reconfiguring the optical filter a plurality of times followed by detecting, segmenting and determining to obtain a plurality of times series of photon counts per bin; and forming an image of the object based on the plurality of times series.

The invention discloses a quantum imaging device based on third-order nonlinear micro-ring cavity enhancement, and the device employs two sets of continuous narrow linewidth laser to pump a third-order nonlinear micro-ring cavity, and outputs quantum correlated photon pairs at the two ends of the micro-ring cavity at the same time. Through precise phase control, the polarization controller and the polarization beam combiner are combined to combine photons, and yield-enhanced quantum correlated photon pairs are formed. The combined signal photons are used for irradiating a to-be-detected sample, and the position of the sample is adjusted through the three-dimensional scanning platform so as to collect reflected signal photons at different positions of the sample; and finally, coincidence count values of different positions are obtained by measuring coincidence counts of reflected signal photons and idler frequency photons, so that two-dimensional morphology information of the sample is reconstructed. The optical fiber integrated third-order nonlinear micro-ring cavity adopted by the invention not only maintains the quantum characteristics of the light source, but also remarkably improves the yield of photon pairs, and effectively improves the signal-to-noise ratio of microstructure imaging.

Method for estimating separation distances between a plurality of image sources in a multi-point source imaging system includes: receiving a plurality of light beams, each from a respective image source and having a quantum state mode; constructing a point spread function (PSF) for light beams specific to a symmetry of the image sources; calculating a quantum Fourier transform on the quantum state mode of the plurality of light beams that achieves a quantum limit in a paraxial approximation regime to estimate separation of image sources at the quantum limit to transform the light beams; detecting the transformed light beams to generate electrical signals from respective transformed light beams; and performing signal processing on the electrical signals to estimate the separation distances between the plurality of image sources.

This invention discloses an on-chip integrated beam-splitting polarization-entangled photonic array chip, belonging to the field of integrated quantum mechanics. The chip includes a pump laser input terminal, an on-chip beam-splitting structure, and a Bragg reflection waveguide array. After the pump light is coupled into the chip, it undergoes progressively uniform power distribution through a beam-splitting structure composed of multiple cascaded Y-beam splitters and is injected into multiple Bragg reflection waveguides. The Bragg reflection waveguides are constructed based on AlGaAs / GaAs materials to form a non-ideal quarter-wavelength structure, efficiently generating polarization-entangled photon pairs through a spontaneous parametric down-conversion process. This invention achieves monolithic integration of pump light beam splitting and entangled photon generation, offering advantages such as low loss, uniform splitting ratio, good output consistency, high integration density, and strong compatibility. It is suitable for applications in quantum imaging, quantum communication, and parallel quantum information processing.

The invention provides an entangled light quantum imaging method based on coincidence count correction in a rainfall environment. The method comprises the following steps: firstly, pumping a periodically poled potassium titanyl phosphate crystal by using 405nm pump light to generate 810nm entangled photon pairs, and separating the 810nm entangled photon pairs into signal light and reference light; the signal light passes through a rainfall area to irradiate a target, and the reference light is scanned by a digital micromirror device. Then, for photon scattering and time broadening effects caused by rainfall, constructing a Monte Carlo photon tracking model, and counting a signal photon space reachable probability; thirdly, correcting the additional optical path in the raindrop based on the Cauty-Crofton theorem, converting the additional optical path into time delay, and introducing a time matching efficiency factor; and finally, establishing a coincidence count correction model in combination with geometric and time constraints, and obtaining a coincidence count value of each pixel through the model and mapping the coincidence count value into a grayscale image. According to the method, imaging degradation caused by rainfall can be effectively inhibited, so that the recovery quality and robustness of quantum imaging under severe weather conditions are improved.