14 results about "Quantum imaging" patented technology

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.

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.

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 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 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.

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.

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.

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.