34 results about "Spectral filtering" patented technology

This invention belongs to the field of concrete pouring technology, and particularly relates to a precise control method for pile foundation concrete pouring based on multi-source sensor fusion. Addressing the problems of large measurement errors, frequent over-pouring, and significant concrete waste in traditional pile foundation pouring, this invention employs a high-frequency ultrasonic probe array coaxially fixed to the outer wall of the pouring guide pipe to uniformly elevate and scan, acquiring three-dimensional point cloud data of the entire pile foundation. After two levels of outlier removal and adaptive multi-scale spectral filtering preprocessing, combined with the expansion of the over-pouring section point cloud, a high-precision three-dimensional model of the pile foundation is constructed. Cross-sectional features at each depth are extracted to generate a pumping flow rate feedforward compensation curve, and a segmented adaptive improved PID controller is constructed with real-time concrete interface elevation and rise speed as feedback quantities to dynamically regulate the pumping flow rate. This invention achieves automated, intelligent, and precise control of the entire pile foundation pouring process, effectively improving pouring control accuracy, significantly reducing concrete waste and construction costs, and solving the measurement and pouring control problems of traditional construction.

A monolithic LED IC die can include multiple emission regions independently operable by applying independent electrical input signals, such as to independently control light output from different individual ones of the multiple emission regions. Optics can include different spectral filters applied to the different light outputs from the different individual ones of the multiple emission regions, such as to define different spectral bands output by the different spectral filters. These different spectral bands can be differently encoded, and the encoded light can be used for enhanced spectroscopy. Additionally or alternatively, the different individual ones of the multiple emission regions can be selectively energized, such as to provide a tunable light source via the different spectral bands output by the optics. The monolithic LED IC die with the multiple emission regions can make the optics more compact, such as for a wearable or other compact device for spectroscopic measurement or analysis.

Provided is an imaging system that can reduce noise in received infrared light data. The imaging system includes a light source that emits infrared light, and an imaging device that images an object irradiated with the infrared light emitted from the light source, wherein: the imaging system includes a first polarizer which is provided between the light source and the object and which polarizes the infrared light emitted from the light source; the imaging device includes, from the infrared light incident side, an absorption type second polarizer that polarizes the infrared light, and an image sensor; the image sensor includes a spectral filter layer and an imaging element; the spectral filter layer includes a multi-bandpass filter having transmission bands in the visible light band and a part of the infrared light band; and the full width at half maximum of the transmission band in the infrared light band of the multi-bandpass filter is 60 nm or less.

This invention provides a quantum algorithm utilizing noise-induced spectral filtering to optimize a target quantum circuit and obtain its global optimal solution. The algorithm includes: S1, constructing a noisy proxy model with added quantum noise for the target quantum circuit to be optimized, used to proxy the evolution of quantum states affected by noise after each quantum logic gate operation; S2, performing a first gradient descent optimization on the noisy proxy model to obtain pre-trained circuit parameters for the target quantum circuit; S3, loading the pre-trained circuit parameters into a noise-free or low-noise environment simulating the target quantum circuit to complete parameter transfer; S4, in the environment simulating the target quantum circuit after parameter transfer, performing a second gradient descent on the circuit parameters based on the loss function of the target quantum circuit until convergence to obtain the global optimal solution for the target quantum circuit.

This invention discloses a multi-image encryption method based on 3D face keys and multiplexed digital holography. The encryption steps include: using 3D face high-order data acquisition technology, chaotic face structured light phase mask generation technology, grating modulation technology, multiplexed digital holographic coding technology, and watermark embedding technology based on discrete wavelet domain singular value decomposition, multiple plaintext information images can be encrypted into an amplitude-type holographic ciphertext and embedded into a host image; the decryption steps include: the user must first calculate the face similarity using a 3D face multilayer perceptron neural network. If the similarity exceeds a preset threshold, authentication is successful. Then, the final decryption result is generated using watermark image extraction technology based on discrete wavelet transform, image decryption technology based on the Cramer-Kroni relation, and spectral filtering technology; otherwise, authentication fails. This method has advantages such as a large key space, high sensitivity, strong robustness of the 3D face key, and low decryption crosstalk.

A system includes a detector and at least one optical component that directs light toward the detector. The system also includes a spatially varying spectral filter that is positioned in the optical train and that has at least two bandpass zones: a first bandpass zone that passes light of a first wavelength range and a second bandpass zone that passes light of a second wavelength range that is different from the first wavelength range. The system also includes a circuit configured to perform a first transform operation on light of the first wavelength detected by the detector and to perform a second transform operation on light of the second wavelength detected by the detector.

The application provides a puncturing signal spectrum filtering method, system, device and medium, effectively solving the phenomenon that the existing puncturing signal spectrum filtering scheme cannot use a simple filter under the premise of meeting the frequency mask requirement. The method comprises the following steps: obtaining a baseband time domain signal to be transmitted by a WiFi7 device under a target bandwidth and a puncturing mode of a current channel where the baseband time domain signal is located; determining a target spectrum shift frequency according to the puncturing mode, so as to perform spectrum cycle shift on the baseband time domain signal to obtain a shifted signal after spectrum shift; performing puncturing filtering processing on the shifted signal according to a preconfigured target filter to obtain a filtered signal; and performing inverse spectrum cycle shift on the filtered signal to restore the spectrum of the filtered signal to the original frequency band position of the baseband time domain signal, so as to obtain a target signal meeting the frequency mask requirement.

The application discloses a kind of integral liquid filling spectral filtering concentrators based on total reflection, including sealed shell, internal total reflection wall surface and filling in the cavity of spectral selective absorption liquid. Through the oblique design of total reflection wall surface, light occurs total reflection at solid-liquid interface, realizes low-loss concentration;Liquid medium selectively absorbs photovoltaic non-response waveband and converts into heat energy, while cooling battery. Multiple concentrating units can be cascaded into linear and point-type concentrator array, realizing high-multiple concentration. The application solves the technical problems of high optical loss, insufficient spectral utilization, functional separation and complex structure in solar concentration system, realizes the integration of concentration, light filtering and thermal management, and improves the comprehensive utilization efficiency and engineering applicability of solar full spectrum.

A spectral filter is provided, as well as an image sensor and electronic device including the spectral filter. The spectral filter includes: a first metallic reflective layer; a second metallic reflective layer disposed above the first metallic reflective layer; a plurality of cavities disposed between the first metallic reflective layer and the second metallic reflective layer, the plurality of cavities including first patterns corresponding to different center wavelengths; and a plurality of lower patterned films disposed below the first metallic reflective layer, the plurality of lower patterned films including second patterns corresponding to different center wavelengths.

Dispersion compensating phase filters, their method of manufacture and use are presented. The phase filters are designed to compensate for chromatic dispersion accumulated by a telecommunication optical signal when travelling in a dispersive line. The phase filter is made by first determining a target dispersion compensating phase profile of a channel of the telecommunication optical signal. This determination involves discretizing the phase profile of the dispersive line into a plurality of frequency sub-bands over a bandwidth of the channel, each frequency sub-band having a width selected on view of compensating the chromatic dispersion. For each frequency sub-band, an average phase value of the phase profile of the dispersive line is computed, and then converted to an equivalent 2Pi-bound phase value, used in building the target dispersion compensating phase profile. A spectral filtering structure embodying the target dispersion compensating profile is manufactured.

An X-ray irradiation apparatus (100) comprises an X-ray source device (110) for creating X-rays (2) with a polychromatic spectrum and an X-ray optic device (120) with a beam axis (3) that is longitudinal, wherein the X-ray optic device (120) comprises a reflector device (121) that is polycrystalline having a reflector geometry, a reflector mosaicity and a reflector thickness and the reflector device (121) is arranged for receiving a portion of the X-rays (2) within an acceptance angle of the reflector device (121) and for creating an X-ray beam (4) by Bragg reflection, which is directed along the beam axis (3) towards a focal position thereof and has a spectral distribution determined by the polychromatic spectrum of the X-rays (2), the reflector geometry, the reflector mosaicity and the reflector thickness, and wherein the X-ray irradiation apparatus (100) further comprises a spectral filter aperture device (122) that is arranged downstream from the reflector device (121) for creating a filter gap (123) transmitting a first spectral portion (4A) of the spectral distribution of the X-ray beam (4) and blocking a second spectral portion (4B) and a third spectral portion (4C) of this spectral distribution, wherein the first spectral portion (4A) has higher energies than the second spectral portion (4B) and lower energies than the third spectral portion (4C), wherein the reflector device (121) has an acceptance solid-angle of at least 100 micro-steradian, and wherein the reflector geometry, the reflector mosaicity, the reflector thickness and the acceptance angle of the reflector device (121) are selected such that simultaneously a radiation flux in the first spectral portion (4A) is at least 1% of an incoming flux of the same spectral portion of the X-rays (2) received by the reflector device (121) with a peak reflectivity of at least 1%, the first spectral portion (4A) has a spectral bandwidth of at most 15%, the second and third spectral portions (4B, 4C) have a flux reduced by at least three orders of magnitude compared with the flux in the first spectral portion (4A), and the X-ray beam (4) has a focal spot size of less than 1.5 mm in both transverse dimensions relative to the longitudinal beam axis. Furthermore, an X-ray fluorescence imaging apparatus (200) and a method of using the X-ray irradiation apparatus (100) are described.

The present disclosure provides a gas detection system for detecting target gases having spectral absorption peaks. The system comprises a light source, at least three spectral filters, each filter having a filtering range corresponding to individual spectral absorption peaks of only one target gas, photodetectors for receiving light from the light source, and a processing circuit. The processing circuit determines the absorption intensity of each spectral filter output, compares the absorption intensity with the spectral absorption peaks of the target gases, and, based on the comparison, determines the presence of the target gases. The spectral filters may be formed on a substrate using integrated silicon photonics and may have filtering ranges of less than 50 nanometers to provide selective detection of gas species.

The application discloses a kind of joint spectrum sensing and multi-modal information fusion emotion recognition method and system, the emotion recognition method first obtains text, visual and audio data under dialogue scene and extracts modal initial features from it.Then, using frequency adapter executes mask perception local spectral filtering, and feature is explicitly decoupled into low-frequency component containing global semantics and high-frequency component containing instantaneous fluctuation, and the feature representation of spectral balance is reconstructed by dynamic gating mechanism.Next, frequency perception cross-modal attention mechanism is designed, while capturing the semantic correlation between modal, by amplifying the high-frequency residual of attention matrix and rebalancing the spectral energy of output feature, effectively offsetting the over-smoothing problem of deep network caused by Softmax.Finally, multi-level fusion is carried out based on spectral calibration feature to realize emotion prediction, which significantly improves the recognition performance of cross-modal conflict and sudden emotional change.

This invention provides a method, apparatus, device, and readable storage medium for generating a waveguide single-photon source, relating to the field of quantum optics. The method includes coupling a fundamental frequency light output from a laser into free space to form a spatial beam; adjusting the polarization state of the collimated spatial beam to match its polarization direction with the crystal axis of a fully encapsulated waveguide device; coupling the polarization-adjusted spatial beam into a polarization-maintaining transmission fiber to form fiber-optic transmission light; injecting the fiber-optic transmission light into the fully encapsulated waveguide device, and converting the fundamental frequency light into frequency-doubled light at a quasi-phase-matching operating temperature; outputting the frequency-doubled light from the fully encapsulated waveguide device and coupling it again into free space to form an output beam; and performing spatial spectral filtering and intensity attenuation on the output beam to reduce the average photon number per pulse to the single-photon level, obtaining a purified single-photon signal. This invention addresses the polarization matching problem between existing waveguide devices and fiber optic transmission links.

This invention discloses a laser cavity soliton microcomb system and its tuning method, relating to the field of integrated photonic chips. A reconfigurable spectral filtering module combining a diffraction grating and an fiber collimator replaces the traditional fixed-parameter filter. Tuning of the center wavelength is achieved by adjusting the angle of the diffraction grating, and tuning of the spectral bandwidth is achieved by adjusting the relative position between the fiber collimator and the diffraction grating. Simultaneously, the synergistic effect of the diffraction grating and the fiber collimator enables highly efficient filtering, greatly improving the system's adaptability to different application scenarios. Multi-wavelength continuously tunable filtering is achieved through the diffraction grating and fiber collimator, eliminating the need to replace multiple fixed filters and significantly reducing the number of components and debugging and maintenance costs. In the laser cavity soliton microcomb system, the reconfigurable spectral filtering module has a compact structure and flexible adjustment, achieving dynamic tuning of both wavelength and bandwidth in two dimensions without introducing significant insertion loss, thus realizing high-performance spectral management.

The present invention relates to the art of spectral detection and discloses a spectral filter and spectrometer based on a multi-stage resonant chamber structure, which is arranged in a computational spectrometer when in use and has at least one optical path, wherein at least n+1 linearly arranged mirrors are provided in one optical path, n∈N and n≧2, and the mirrors have a reflectance of 5% to 50%. Resonant chambers are formed between two adjacent mirrors, and the linearly arranged n+1 mirrors constitute n stages of resonant chambers, the chamber length of each resonant chamber being 20μm to 2000μm, and the chamber lengths of at least two resonant chambers are different or the reflectances of at least two mirrors are different so that the n stages of resonant chambers can generate random transmission spectra in the frequency domain.

A method for manufacturing ophthalmic lenses or semi-finished lenses (20) using injection molding includes implementing a receiving member (2A) provided with a bevel whose size is determined to prevent the lens from adhering to the receiving member when it is removed from the cavity assembly (10). An improvement of the invention further proposes modifying the position of a temperature sensor in the cavity assembly for controlling the temperature-time profile implemented in the injection molding process. The method of the invention improves production yield, including for lenses with integrated functionalized films or coverslips (21), such as polarized lenses or spectral filters.

The application provides a kind of multimodal polarization snapshot imaging system and imaging method, it is related to multispectral polarization imaging technical field, the imaging system includes: polarization module, for the polarization separation processing of original light beam, to form a plurality of preset polarization direction polarization light beam and a plurality of unpolarized intensity light beam;Filtering module, for the spectral filtering processing of intensity light beam and polarization light beam, form corresponding intensity filtered light beam and polarization filtered light beam;Lens module, for the focusing of intensity filtered light beam and polarization filtered light beam respectively;And sensor module, for the imaging of intensity filtered light beam and polarization filtered light beam after focusing respectively, generate multimodal polarization image, multimodal polarization image includes a plurality of intensity images and a plurality of polarization images corresponding to original light beam.The application has the advantages of flexible parameter configuration, mature and feasible process, high integration, relatively low cost.

This invention belongs to the field of diffuser sheets for HUD display systems, and particularly relates to a fabrication apparatus and method for a uniform holographic diffuser sheet. The fabrication apparatus includes a 325nm He-Cd laser, a dual-beam superposition exposure optical path, a 4F spatial filtering system, and a photolithography receiving device. The dual-beam superposition exposure optical path includes a laser beam expander, a beam splitter, a reflector, and a source diffuser. The laser beam expander expands the ultraviolet laser beam, which is then split by the beam splitter to obtain two beams of equal energy. The reflector then illuminates the same position on the same surface of the source diffuser. The 4F spatial filtering system receives the scattered light emitted from the source diffuser and performs spectral filtering. The filtered scattered light is then illuminated by the photolithography receiving device. This invention can manufacture holographic diffusers with a uniformly distributed scattered light field, improving display quality and the energy utilization rate of the HUD system.

This invention belongs to the field of fluorescent labeling detection technology and discloses an in vitro diagnostic kit and method for an embedded fluorescent labeling detection system. The kit includes a microfluidic chip carrier, an optical detection module, a fluid control module, and a signal processing module. The optical detection module employs a wavelength-precisely aligned excitation source array and narrowband spectral filtering components, combined with a specific angled optical path design, to physically suppress optical crosstalk and background noise. The fluid control module achieves high-precision and stable control of micro-volume fluids through the synergy of a micro-valve array, a pulsation damper, and a high-frequency pressure feedback loop. This invention fundamentally solves the problems of crosstalk, noise, and fluid control accuracy in multi-label fluorescence detection through triple innovation of hardware optical path purification, precise fluid control, and software algorithm decoupling, significantly improving the specificity, accuracy, and reliability of the detection.

Multi-band spectral filters that can transmit visible light but block ultraviolet and infrared light can be used for energy-saving windows to address global warming. However, such filters typically only consider normal incident light. The present disclosure describes PML structures that allows selective solar spectrum transmission in wide angles using a quantum computing-enhanced active learning scheme, which includes machine learning, quantum annealing, and wave-optics simulation in an iterative loop. The optical characteristics of the PML structure disclosed herein may be capable of reducing the temperature rise in an enclosure space when combined with a thermal radiation layer (e.g., reduction of 5.4 – 7.2°C and an annual energy saving of ~97.5 MJ / m2). The structure disclosed herein may be incorporated into new and existing windows (e.g., in buildings or automobiles) to reduce energy consumption (e.g., relating to cooling), and the active learning scheme can be applied to design other materials with complex properties.

The present disclosure relates to a multi-band imaging spectrometer. A system includes a detector and at least one optical component that directs light to the detector. The system also includes a spatially varying spectral filter positioned in the optical system and having at least two bandpass regions: a first bandpass region that passes light of a first wavelength range and a second bandpass region that passes light of a second wavelength range different from the first wavelength range. The system also includes circuitry configured to perform a first transform operation on light of the first wavelength detected by the detector and a second transform operation on light of the second wavelength detected by the detector.

This invention discloses a picosecond laser freckle removal device, relating to the field of therapeutic equipment technology, including a control unit; a power module: the power module provides isolated, filtered, and emergency-stop protected electrical energy to the control unit and the laser; a cooling mechanism: the cooling mechanism includes a water-cooling module and an air-cooling module, used to maintain the temperature of the laser and optical path within a preset range; a laser output module: the laser output module includes a laser, a spectral filter, a light guide arm, and a skin temperature sensor located at the output end of the light guide arm, the sensor feeding back the skin temperature to the control unit at ≥100 Hz; and an energy adjustment module, which uses ultra-short frequency laser to remove freckles, monitors the skin temperature in real time to avoid skin damage, enhances the internal heat dissipation function of the device, ensures safe operation, and improves the user experience.

The application discloses a gamma spectrum filtering method and system based on a hybrid deep learning architecture, and belongs to the technical field of element analysis. The method comprises the following steps: acquiring original spectrum data; inputting the original spectrum data into an encoder in a spectrum filtering model for feature extraction, so as to obtain a first encoding feature map; inputting the first encoding feature map into a feature enhancement module, so as to perform self-attention processing on the first encoding feature map, and obtain filtered spectrum data. In the above scheme, whether in the encoding process or in the self-attention processing process, the spectrum filtering model can consider the features of the spectrum data on the whole and local peak values, so that the accuracy of element analysis is improved.

This paper discloses a reconfigurable photonic superstructure and its applications. The invention relates to a hierarchical photonic structure in which vertically aligned functional nanoscale anchoring elements serve as nanoscale anchoring elements, field enhancement elements, and anisotropic inducing elements for a liquid crystal (LC) medium, while a metasurface-configured dielectric or hybrid nanostructure provides spatially encoded electromagnetic phase and amplitude control. The disclosed system enables electrically, optically, thermally, or mechanically reconfigurable wavefront manipulation, adaptive beam control, tunable spectral filtering, programmable holography, and photonic computing. Applications include aerospace adaptive optics, reconfigurable communication systems, sensing and imaging platforms, and quantum photonic information processing.

Disclosed is an apparatus, a system and a method for multiband event-based imaging. The apparatus includes, an optical focusing component to capture and focus incident light from an object in a scene, a multi-band spectral filter assembly to receive and filter the incident light from the optical focusing component, an event sensor including a pixel array to detect one or more events, including sensing a change in relative intensity over time for filtered light received from the multi-band spectral filter assembly, and a filter assembly driver to sweep the multi-band spectral filter assembly in front and across the pixel array of the event sensor, and along a plane of motion perpendicular to the multi-band spectral filter assembly.

The application provides a spectral image sensor and system and a preparation method of a pixelated liquid crystal device, the spectral image sensor comprises: an image detection array and a spectral filter array, the image detection array and the spectral filter array are arranged in a stack, the spectral filter array comprises a pair of polarizers and a pixelated liquid crystal device arranged between the pair of polarizers, and liquid crystals in each pixel region of the pixelated liquid crystal device have a fixed out-of-plane rotation angle. The spectral image sensor and system and the preparation method of the pixelated liquid crystal device provided by the embodiment of the application have simple and stable pixelated liquid crystal device structures, and the cost of the spectral image sensor is reduced.

This specification describes methods and systems that improve the detection of target defects and the measurement of structures embedded within complex three-dimensional semiconductor structures. Through-focus scanning optical microscopes (TSOMs) that use nonlinear second-harmonic generation (SHG) optical signals emitted from a sample provide interface-selective sensitivity for the measurement and inspection of advanced semiconductor device structures. The TSOM / SHG system includes a spectral filter that allows collected light at wavelengths corresponding to SHG emission to pass through. In some embodiments, the TSOM / SHG system includes an ultrafast pulsed laser source emitting ultraviolet to near-infrared wavelengths to efficiently induce SHG at surface interfaces. By halving the wavelength specific to SHG, the illumination wavelength can be doubled without compromising resolution. In further embodiments, the TSOM / SHG measurement system includes an external illumination source, an external field source, or both to induce a DC electric field at one or more interfaces of the illuminated structure, thereby improving SHG emission.

The imager comprises: - a spectral filter matrix formed of a repeated pattern of spectral filters; - a polarizer matrix; - a photosensor matrix; and - a processing device designed to, for each of the different spectral bands, form at least one image of pixels having positions in the image corresponding respectively to predefined positions (i, j) of a mask (M) in the photosensor matrix, each of the pixels being calculated from the light intensities measured by the photosensors of the spectral band considered contained in the mask (M) at the position (i,j) of the pixel.The spectral filter pattern is designed so that, for each of the different spectral bands and for all predefined positions (i, j) of the mask (M), the photosensitive cells of the spectral band in question have an isobarycenter located in a central virtual cell (PVC) of the mask (M) of the same size as cells in the photosensitive cell array, and each of the predefined positions (i, j) of the mask (M) is offset by another predefined position (i, j) by one column or one row of the photosensitive cell array. Figure for the abbreviation: Fig. 7.

This disclosure relates to the field of spectral imaging technology, including design methods, devices, storage media, and applications of quantum dot spectral filter arrays. The method involves: determining a predetermined number of target quantum dot materials from a quantum dot material library; obtaining a data mapping relationship between the second spectral property data of the target quantum dot materials and their design parameters; determining a simulated quantum dot spectral filter array corresponding to the target quantum dot materials based on the data mapping relationship, and establishing an imaging mathematical model based on the simulated quantum dot spectral filter array; processing the incident spectral data based on the imaging mathematical model to obtain simulated response results; obtaining reconstructed spectral data corresponding to the simulated response results; and iteratively training the imaging mathematical model using deep learning based on the differences between the incident spectral data and the reconstructed spectral data to update the design parameters in the data mapping relationship. This improves the reliability and efficiency of determining the design parameters.