17 results about "Photon transmission" patented technology

This invention relates to the field of photoelectric detection and performance monitoring technology, specifically to a real-time performance verification system for a safety light curtain based on pulse feedback. The system performs the following steps: based on the changes in the effective photon count of each pulse of the safety light curtain, the effective photon count of pulses whose decrease in effective photon count is due to transient interference is smoothed to obtain a photon transmission efficiency time series; based on the photon transmission efficiency time series, a dynamic derivative curve of the pulse edge is established, and pulses within a period where the core parameter of the dynamic derivative curve at the pulse edge continuously changes in a second-order direction towards the target direction are identified as abnormal pulses; each key time node of the abnormal pulse is determined; based on the changes in the differences between each key time node, the fault cause corresponding to the abnormal pulse is located, thus improving the accuracy of real-time performance monitoring of the safety light curtain.

The application discloses a monolithic integrated self-powered luminescent solar concentrator-electrochromic integrated device and a preparation method thereof, and has a layered structure, which is, from bottom to top, a conductive glass substrate, an electrochromic layer, a transparent sealing tape, a fluorescent gel electrolyte layer, a transparent sealing tape, an electrochromic layer and a conductive glass substrate. The monolithic integrated self-powered luminescent solar concentrator-electrochromic integrated device can realize reversible conversion between bleached state and colored state within 100 seconds under natural sunlight, and realize dynamic adjustment of the transmittance of incident sunlight. The core functional layer of the device is a fluorescent gel electrolyte with high luminescent efficiency, and the photoluminescence quantum yield can reach 74.9%, so that the device has excellent light capturing and photon transmission performance, and can realize high-efficiency photoelectric conversion by coupling a solar cell at the edge of the device to provide power for the reversible driving of the electrochromic device. The application realizes self-powered electrochromism which can be applied to building glass curtain walls.

This invention belongs to the field of quantum dialogue and discloses a one-step quantum dialogue method. In this method, communicator A prepares a large number of identical polarization-spatial hyperentangled states and sends one photon from each hyperentangled state to communicator B through a quantum channel, establishing a hyperentangled quantum channel between the two parties. After confirming the security of the photon transmission process, both parties encode the photon pairs according to the information to be transmitted. Then, by running nonlocal Bell state measurements and publishing the detector responses, both parties can read the information transmitted by the other, thus achieving bidirectional quantum communication, i.e., quantum dialogue. Compared with existing quantum dialogue protocols, this invention reduces the number of photon transmissions in the channel from two to one, simplifying experimental operations and effectively reducing the photon loss rate, which can effectively promote the practical application of quantum dialogue.

The present disclosure proposes a quantum satellite communication performance adjustment method based on the heliotropism of sunflowers, including establishing a quantum satellite communication system model in a snowfall environment; the quantum satellite communication system model includes an analog quantum satellite communication system; analyzing the influence of snowfall intensity and quantum satellite communication elevation angle on the quantum satellite communication link in the quantum satellite communication system, obtaining the attenuation result of the quantum satellite communication link in the snowfall environment, and the relationship between the photon transmission distance of the quantum satellite and the communication elevation angle; according to the attenuation result of the quantum satellite communication link and the relationship between the photon transmission distance of the quantum satellite and the communication elevation angle, using the heliotropism principle of sunflowers, the optimal average photon number performance adjustment function relationship of each pulse in the quantum satellite communication system in the snowfall environment is obtained under the decoy state protocol. The present disclosure can effectively cope with the influence of snowfall and small elevation angle on the performance of quantum satellite communication.

A lighting system (LS) equips a vehicle and comprises: - a photon-generating source, - a first light guide (GL1) receiving the generated photons and delivering them to a first front face (FV1), - a second light guide (GL2) receiving the photons from the first front face (FV1) on a rear face (FR2) and delivering them to a second front face (FV2) to perform a photometric function, - a third light guide (GL3) interposed between the first (GL1) and second (GL2) light guides, coupled to the rear face (FR2), and capable of transferring photons delivered to the first front face (FV1) into the second light guide (GL2), and - a mask (MD) comprising an aperture (O) through which the second light guide (GL2) passes, masking the third light guide (GL3), and aligned with the latter. Figure 2

The invention provides a particle size measurement method and system for processing scattering image distortion of a cylindrical sample pool, and the method comprises the steps: S1, carrying out the laser scattering measurement of a two-phase system of the cylindrical sample pool, obtaining a scattering image, dividing a plurality of axial band regions based on the optical energy distribution of the scattering image in the axial direction, obtaining the experimental scattering light energy distribution data of the band regions, and taking the data as inversion data. S2, establishing a three-dimensional laser scattering model, simulating a photon transmission process in the cylindrical sample cell, judging a band region to which each photon belongs according to the coordinate of each photon on the detector so as to obtain simulated scattered light energy distribution data corresponding to a certain particle size, and calculating simulated scattered light energy distribution data corresponding to different particle sizes to obtain an inversion coefficient matrix, the inversion coefficient matrix considers the phenomenon of image distortion caused by light beam convergence and divergence due to the curved wall surface of the cylindrical sample cell. And S3, importing the inversion data and the inversion coefficient matrix into an optimal inversion algorithm, and solving to obtain particle size distribution.

A lighting system (LS) is fitted to a vehicle and comprises: - an electronic board (EB) with N photon sources (SP1-SP2) generating photons, with N ≥ 2, - N light guides (GL1-GL2), each designed to receive on a rear face (FR2, FR1) the photons generated by an associated photon source (SP1, SP2) and to deliver these received photons on a front face (FV1, FV2) to perform one of N photometric functions, and - a chassis (CC) that permanently holds the N light guides (GL1-GL2) in N predefined positions arranged vertically, and the electronic board (EB) in a predefined position in which the N photon sources are respectively placed in predefined ways opposite the rear faces (FR1-FR2) of the N light guides (GL1-GL2). Figure 3

This invention discloses a pixelated scintillator screen based on a Si-SiO2 array (SOA), its fabrication method, and its applications, belonging to the field of X-ray imaging materials technology. This scintillator screen uses a low-dimensional perovskite halide Cs5Cu3Cl6I2 single crystal as the scintillator medium. The low-refractive-index SiO2 layer enables total internal reflection guided by vertical photons, while the Si substrate simultaneously provides high X-ray transmittance and visible light absorption, effectively reducing optical crosstalk. Through a vacuum-assisted melt infiltration process, the Cs5Cu3Cl6I2 single crystal is uniformly filled into the SOA channels, forming a well-confined scintillator structure that suppresses lateral scattering and enhances longitudinal photon transmission. Compared with traditional thin-film scintillators, the SOA-based design significantly improves imaging performance, achieving a resolution of 20.10 lp·mm. ‑1 Spatial resolution and 35 nGy·s ‑1 The method achieves the lowest detectable dose. Furthermore, the fabrication process is highly scalable, allowing for the flexible construction of scintillator arrays with customized pixel sizes and layouts. This approach provides a promising strategy for achieving next-generation X-ray imaging with both high resolution and low dose sensitivity.

The application belongs to the technical field of microwave photonics, and particularly relates to a microwave photon transmission system, wherein a first wavelength power signal output by a first laser is obtained through an optical emission device, the first wavelength power signal is a power signal subjected to SBS suppression; an optical amplification device is connected with the optical emission device, and is used for amplifying the power of the first wavelength power signal; an optical relay device is connected with the optical amplification device, and is used for performing optical power compensation on the first wavelength power signal and outputting a first wavelength power compensation signal; and an optical receiving device is connected with the optical relay device, and is used for demodulating the first wavelength power compensation signal into an electrical signal. The application can effectively suppress SBS, thereby suppressing phase jitter caused by temperature change, strain change and the like in microwave photon transmission, suppressing system deterioration caused by SPM and EPM, and being beneficial to improving the performance of the microwave photon transmission system.

An optical unit (OU) equips a vehicle and comprises: - a light guide (LG) delivering, to a terminal section (TS) having a first chosen shape, photons from a first photon source (PS1) participating in a first photometric function, and - a first wall (P1) having a front face (FV1) in front of which the terminal section (TS) is installed, and forming a chosen angle with a second wall (P2) having a reflective face (RF) such that this terminal section (TS) is positioned opposite the reflective face (RF) so that the latter (RF) creates an image of the first chosen shape, having a second chosen shape, when the terminal section (TS) delivers the photons. Figure 2

A lighting device (ED) is fitted to a vehicle's air intake grille comprising internal partitions separated by first passages adapted to airflow, and includes: - N photon sources generating photons, - a diffusion element (DE) comprising N sub-parts (SPP) separated by second passages (P2) adapted to airflow, each housed within a first passage, and diffusing each of the photons received on an inlet face (FE) to an outlet face (FS) so that they contribute to illuminating the air intake grille, and - a transfer element (TE) comprising N reflectors (RP) separated from each other by third passages (P3) adapted to airflow, placed in front of the inlet faces (FE), and each transferring, by reflection(s), photons generated by a photon source (SP) to an associated inlet face (FE). Figure 4

A method of de-embedding includes providing a first transmission line with a first length and a second transmission line with a second length greater than the first length. Each of the first and second transmission lines is terminated by a respective pad at each end thereof. The method further includes obtaining a first matrix representing measured data of the first transmission line, and a second matrix representing measured data of the second transmission line, and constructing a third transmission line having a third length relating to a difference between the second length and the first length and a scaling factor. The method further includes determining a third matrix based on the first matrix, the second matrix, and the scaling factor, and determining a fourth matrix representing intrinsic properties of the first transmission line without parasitic effects of the pads based on the first matrix and the third matrix.

Apparatus and associated methods relate to a photonic transmission system. In an illustrative example, a photonic transmission system may include a network of Photonic Energy Transmission and Communication System (PETACS). The PETACS, for example, may include a concentrator to receive solar energy to power various photonic loads. The concentrator may, for example, be configured to track an incoming light beam to a photovoltaic cell. For example, the PETACS may include a polarizing beam multiplexing system (PBMS). The PBMS may, for example, split a received light beam into multiple beams based on predetermined ranges of wavelengths. The PBMS may then power various photonic loads independently and simultaneously corresponding to a range of wavelengths. For example, the PETACS may transmit excess photonic energy and / or data to a remote PETACS using a steerable beam transceiver unit. Various embodiments may advantageously improve utilization of photonic energy and increase generation efficiency from solar energy.

The invention provides a quantum chip and a multi-quantum-bit full-connection interconnection method based on time division multiplexing, the quantum chip comprises at least one basic quantum module, and each basic quantum module comprises a superconducting quantum bit, a reading resonant cavity, a time division multiplexing module and a control module, the Z control line is used for superconductive quantum bit frequency offset; the XY control line is used for superconductive quantum bit control; the microwave transmission line is used for reading superconductive quantum ratio characteristic dispersion; the microwave transmission line is used for single photon transmission; the auxiliary resonant cavity is used as a bus coupling cavity between the superconducting quantum bits of each basic quantum module and a transmission resonant cavity for the quantum chip to access a quantum channel; wherein the superconducting quantum bit of each basic quantum module is coupled with the auxiliary resonant cavity, the auxiliary resonant cavity is coupled with a microwave transmission line used for single photon transmission, and the reading resonant cavity of each basic quantum module is coupled with a microwave transmission line used for superconducting quantum specific characteristic dispersion reading.

This invention discloses a high spatial and spectral resolution dual-mode imaging system and method for energy-spectral CT and optical imaging. The system uses an X-ray energy-spectral detector to acquire multi-level X-ray projection data; a hyperspectral camera is used to acquire multi-band fluorescence data and fluorescence images. The method includes correcting the X-ray projection at each energy level, performing three-dimensional reconstruction on the corrected multi-level projection data, volume rendering of the reconstructed three-dimensional data to obtain the three-dimensional contour of the object, mapping the fluorescence data onto the three-dimensional contour, and for each spectral band, constructing and reconstructing an accurate photon transport forward model based on the accurate material decomposition results obtained from the multi-level CT reconstruction, referencing the scattering and absorption coefficients of different materials, and based on the third-order simplified spherical harmonic equation, performing three-dimensional registration and image fusion of the dual-mode images to obtain a dual-mode fused image. The dual-mode fused image obtained by this invention has high spatial and spectral resolution.

An optical path monitoring process, including the following steps executed by a first node of an optical network: (i) generating photons that are at least partially indistinguishable in frequency, polarization, spatial mode and temporal profile; (ii) transmitting a first photon of the generated photons to a remote node of the optical network over an optical path; (iii) receiving the first photon from the remote node over an optical path; and (iv) interfering the received first photon with a second photon of the generated photons to generate a quantum interference visibility output; and (v) assessing physical integrity of the optical path(s) on the basis of the quantum interference visibility output.