71 results about "Selective filter" patented technology

The invention discloses a waterproof, breathable and differential calibration packaging device and method for a gas sensor, and the device is characterized in that the top of a sensor housing is provided with a waterproof and breathable film, so that tested gas can rapidly pass through the waterproof and breathable film, and the speed of water vapor entering a test space is reduced; the fan drives the gas to flow between the test space and the absorption space, so that water vapor or water vapor / tested gas entering the test space can be adsorbed. If the absorption space is filled with the water absorption material, the water vapor in the test space is removed by combining the water vapor slow permeation effect of the waterproof breathable film and the air flow driving function of the fan. If the absorption space is filled with a water absorption material and a selective filtering material, intermittent flow of gas in the test space is realized through starting and stopping of the fan, a dynamic response signal of the gas sensor is obtained, and zero calibration of the gas sensor is realized by utilizing an output signal when the fan is started; and the anti-interference detection of the gas sensor is realized by utilizing the output signal difference in the on and off states of the fan.

An electronic device may include wireless circuitry with a processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The amplifier circuitry may include non-linearity suppression circuitry that suppresses or reduces non-linear behavior of components such as a core amplification transistor and a degeneration inductor within the amplifier circuitry. The non-linearity suppression circuitry may include an intermodulation distortion suppression circuit having an auxiliary amplification transistor. The non-linearity suppression circuitry may include a frequency-selective filter coupled to the degeneration inductor.

An integrated photonic device independently directs each channel of a multiplexed input optical signal received from a corresponding one of N input port to one of N output ports, each multiplexed input optical signal including N channels. The device includes: N input waveguides; secondary waveguides; wavelength-selective filters, each: i) including a ring resonator, ii) being optically coupled to a corresponding one of the N input waveguides and a corresponding one of the secondary waveguides, and iii) being switchable between a first state in which an optical signal in a corresponding one of the N channels is coupled from the corresponding input waveguide into the corresponding secondary waveguide and a second state in which the optical signal in the corresponding one of the N channels is not coupled into the corresponding secondary waveguide; N multi-wavelength mixers; and N output waveguides.

An optical member includes aperture regions, a lens device, and an imaging apparatus. A lens device includes: an imaging optical system; a first polarizing part that polarizes at least a part of rays transmitted through the imaging optical system; and a filter unit that is disposed at a pupil position of the imaging optical system or near the pupil position, and includes aperture regions transmitting the rays of the imaging optical system and including a first aperture region and a second aperture region, wavelength selective filters disposed in the first aperture region and the second aperture region and transmitting pieces of light of which at least a part of wavelength ranges are different from each other, and a second polarizing filter including polarizing filters disposed in the first aperture region and the second aperture region and having polarization directions different from each other.

The invention provides a seismic fault identification method and system based on multi-attribute collaboration and spectral domain graph enhancement, and relates to the technical field of seismic exploration, and the method comprises the steps: carrying out the all-directional dip angle and azimuth angle scanning of a seismic data volume, extracting multi-scale guide field information through combining structure tensor decomposition, and executing anisotropic diffusion filtering; calculating characteristic value distribution through a characteristic value coherence algorithm based on the filtering data volume, and determining the structural consistency difference of adjacent seismic traces to obtain a fracture coherence attribute data volume; carrying out azimuth gather sorting and pre-stack time migration processing on the seismic data volume, extracting seismic wave dynamic response characteristics, carrying out Fourier series expansion on the azimuth change rate to obtain a crack indication information data volume, splicing the data volume and executing multi-scale three-dimensional convolution solution, and constructing a spatial dependency graph through a spectral clustering algorithm; spectral domain enhancement features are obtained through spectral domain graph transformation and frequency selective filtering reconstruction, and morphological connectivity analysis is executed to obtain a crack prediction result.

The utility model relates to a liquid sampling device capable of selectively filtering, which comprises an outer cylinder and an inner bin, and the outer cylinder comprises a first filtering window and a cylinder body adjacent to the first filtering window; the inner bin is provided with a liquid extracting and sampling device and a bin wall capable of being overlapped with the first filtering window; a sample introduction pipe capable of performing secondary filtration is also arranged; the sample feeding pipe is connected with the liquid extraction sample discharging device; the inner bin can seal or open the first filtering window through rotation. According to the utility model, the first filtering window is arranged on the outer cylinder, and the sample introduction pipe capable of secondary filtering is arranged in the inner bin, so that multiple filtering is realized. In addition, through the arrangement of the liquid extraction and sample discharge device, the liquid sample in the inner bin can be rapidly extracted to the sampling bottle, so that the next analysis can be carried out.

An integrated photonic device independently directs each channel of a multiplexed input optical signal received from a corresponding one of N input port to one of N output ports, each multiplexed input optical signal including N channels. The device includes: N input waveguides; secondary waveguides; wavelength-selective filters, each: i) including a ring resonator, ii) being optically coupled to a corresponding one of the N input waveguides and a corresponding one of the secondary waveguides, and iii) being switchable between a first state in which an optical signal in a corresponding one of the N channels is coupled from the corresponding input waveguide into the corresponding secondary waveguide and a second state in which the optical signal in the corresponding one of the N channels is not coupled into the corresponding secondary waveguide; N multi-wavelength mixers; and N output waveguides.

Provided is an illumination device that makes it possible to enhance utilization efficiency of light, and a display device that includes the illumination device. The illumination device includes: a light source that is configured to generate light of a first wavelength; a luminescent body that is configured to wavelength-convert the light of the first wavelength to light of a second wavelength, the second wavelength being different from the first wavelength; and a wavelength selective filter that is provided on a light-incident side of the luminescent body, the wavelength selective filter being configured to transmit the light of the first wavelength and to reflect the light of the second wavelength.

The present invention provides an amplitude-phase dual tight coupling SIR high-frequency selective filter. The filter comprises: two resonator units with the same structure, the two resonator units are distributed in mirror symmetry on a dielectric substrate; wherein the resonator unit comprises a first quarter-wavelength SIR resonator, a high-impedance feeder and a 50-ohm standard feeder; the first quarter-wavelength SIR resonator comprises a first low-impedance line and a first high-impedance line, the first high-impedance line is divided into a first part and a second part, the first part and the second part are perpendicular to each other so that the first high-impedance line is L-shaped as a whole, one end of the first part away from the L-shaped right angle is connected to the first low-impedance line, and one end of the second part away from the L-shaped right angle is provided with a metal via; one end of the high-impedance feeder is connected to the first part and parallel to the second part, and the other end is connected to the 50-ohm standard feeder.

A system and method for combining and separating non-orthogonal signals. A transmitting component includes a set of generators of non-orthogonal signals and an adder for forming a group mixture. A receiving component includes a band-pass selective filter, an analog-to-digital converter and a calculator-solver for separating signals or channels. The system and method are designed to provide an almost ideal channels separation due to a new original group mixture processing procedure performed by the calculator-solver. The system and method provide significant increase in noise-immunity and the achievement of transmission rates that are exceeded the Shannon's Capacity of the group path.

The present invention relates to a wavelength-tunable optical device in which a semiconductor laser diode chip equipped with a heater or a wavelength-selective filter equipped with a heater is in thermal contact with a thermoelectric element, the thermoelectric element is fixed at a constant temperature, and the channel is varied by varying the average power applied to the heater. The invention provides a method for stopping the operation of the heater even if a malfunction occurs in the heater, or for operating the heater regardless of the channel setting, and for varying the channel by changing the temperature of the thermoelectric element.

An optical component can include a substrate. The optical component can further include metasurface elements formed on a side of the substrate. Each metasurface element can provide a wavelength-selective filter, with at least two metasurface elements configured to filter different wavelengths. At least one of the metasurface elements can be comprised of a non-local metamaterial.

An optical device (807) for a head-up display (810) includes one or more holographic optical elements (803) and a filter device (811). The filter device (811) includes a micro-sheeted grating and is designed to angularly selectively filter light.

Circuit arrangement (200), comprising: a sensor, set up to provide an analog signal (204); an analog-to-digital converter (202), set up to receive the analog signal (204) and provide an initial signal (206); a first filter (208) configured to receive a signal based on the first signal (206) and to provide a second signal (210); where the first filter (208) is set up such that: • that the second signal (210) is passed through unamplified in a frequency range from 20 Hz to 10 kHz, and • that the second signal (210) has a gain greater than 0 dB at least from a specified frequency greater than 20 kHz; and a second filter (214) connected to the analog-to-digital converter (202) and configured to provide a third signal (216) based on the first signal, wherein the second filter (214) is configured as a frequency-selective filter to process the signal received by the second filter, that the amplitude of the signal received by the second filter (214) is reduced in a specified frequency range, wherein the specified frequency range has a frequency greater than 20 kHz.

The invention discloses a microwave photon high-speed real-time signal processing device and method, and relates to the technical field of microwave photon signal processing, and the device comprises a signal conversion module which is used for receiving a microwave signal and converting the microwave signal into an optical signal; the novel photonic filter based on the photonic crystal and the micro-ring resonator structure is adopted, the high-precision and high-selectivity filtering function is achieved, noise and interference in signals can be effectively removed, the quality and the signal-to-noise ratio of the signals are improved, the filtering effect is further improved by combining advanced filtering algorithms such as self-adaptive filtering and digital filtering, and the filtering efficiency is improved. By utilizing the programmable characteristic of the photon filter, the dynamic adjustment of filtering parameters is realized, different signal environments and processing requirements can be quickly adapted, the application of software definition and light-operated programmable technologies is realized, the parameter adjustment is more convenient, quicker and contactless, the reconfigurability and flexibility of the device are improved, and the device is suitable for popularization and application. And the processing requirements of complex signals can be met.

The invention provides a multi-band spectrum selective filtering method based on a programmable metasurface. The multi-band spectrum selective filtering method comprises the steps that a layered damping supporting structure is constructed below a substrate of a programmable metasurface array; preparing a self-compensation type resonance unit array on the layered damping supporting structure; constructing an array-level phase synchronization control network, and carrying out local electric tuning compensation and global phase synchronization on the self-compensation type resonance unit array based on a distributed sensing signal; establishing a sound pressure monitoring and spectrum feedback correction path, and performing adaptive phase correction on the identified acousto-optic coupling interference area by associating sound pressure distribution with time sequence change of a transmission spectrum; according to the method, the programmable metasurface is operated in the vibration and sound pressure environment, a stable multi-band spectrum filtering result is output, and the method can cooperatively solve micro-deformation phase disturbance from the aspects of structural design and active control, so that the spectrum filtering stability of the programmable metasurface in the vibration and sound pressure environment is improved.

Color image sensors and systems are provided. A sensor as disclosed includes a plurality of color sensing pixels disposed within an array, each of which includes a plurality of sub-pixels. Each color sensing pixel within the image sensor is associated with a set of diffraction features and a plurality of wavelength selective filters that only partially overlay an area of the pixel. The diffraction features can be formed from materials having an index of refraction that is higher than an index of refraction of the surrounding material. Color information regarding light incident on a pixel can be determined by applying ratios of signals obtained by pairs of included sub-pixels and calibrated ratios for different colors to a set of equations.

The invention discloses an application of a flexible bioelectronic device in bioelectrical signal sensing. The flexible bioelectronic device has an in-situ signal filtering function. The main materials of polyacrylamide, gelatin methacrylamide and chitosan of the flexible bioelectronic device show selective filtering performance, and dynamic noise under target frequency can be effectively filtered out, so that an active in-situ signal filtering function at a molecular level is realized.

The invention relates to a full-color display device and a manufacturing method, a blue light LED chip and a TFT driving system are integrated, and a pixel-level light path isolation structure is constructed by adopting a black glass substrate. A through hole array matched with an LED chip is formed through synchronous laser drilling, a quantum rod solution modified by an olefine acid ligand and photo-cured by a multi-sulfydryl cross-linking agent is filled, and ordered arrangement and submicron patterning of quantum rods are achieved. And in combination with the top wavelength selective filtering reflector and the absorption of stray light by the black glass substrate, the light crosstalk is reduced, and the color saturation and the lighting effect are improved. Further, light-proof glass can be used as a substrate, the substrate and the black glass matrix adopt a homogeneous glass formula, the risk of thermal stress deformation is eliminated, and the preparation process is simplified by a back exposure curing process. The device has the characteristics of high color gamut, wide viewing angle polarization and high resolution, is short in manufacturing period and high in material utilization rate, and is suitable for the field of ultra-high-definition Micro LED full-color display.

An integrated photonic device independently directs each channel of a multiplexed input optical signal received from a corresponding one of N input port to one of N output ports, each multiplexed input optical signal including N channels. The device includes: N input waveguides; secondary waveguides; wavelength-selective filters, each: i) including a ring resonator, ii) being optically coupled to a corresponding one of the N input waveguides and a corresponding one of the secondary waveguides, and iii) being switchable between a first state in which an optical signal in a corresponding one of the N channels is coupled from the corresponding input waveguide into the corresponding secondary waveguide and a second state in which the optical signal in the corresponding one of the N channels is not coupled into the corresponding secondary waveguide; N multi-wavelength mixers; and N output waveguides.

Examples described herein provide selective filtering by a network device for continuous 5 GHz and 6 GHz operation. Examples may include receiving, by the network device, a first signal in a 5 GHz band, and generating, by the network device, a second signal in a 6 GHz band. Examples may include selecting, by the network device, a first filter or a second filter to be applied the first signal in the 5 GHz band, wherein the first filter allows a lower frequency band to pass than the second filter in the 5 GHz band, selecting, by the network device, a third filter or a fourth filter to be applied to the second signal in the 6 GHz band, wherein the third filter allows a lower frequency band to pass than the fourth filter in the 6 GHz band, and simultaneously applying, by the network device, the selected first or second filter to the first signal and the selected third or fourth filter to the second signal.

To solve the problem that filter performance of an optical filter may be degraded when an angle of incidence of light directed toward the optical filter changes from a configured angle of incidence to a threshold angle of incidence, which may cause blue shift of band edges to shorter wavelengths.SOLUTION: In some embodiments, an optical filter assembly comprises: a first optical filter disposed on a first side of a substrate, the first optical filter being a bandpass filter; and a second optical filter disposed on a second side of the substrate, the second optical filter being associated with a threshold amount of angular shift at a threshold angle of incidence.SELECTED DRAWING: Figure 1

A photometric apparatus includes: a splitting optical system that splits light to be measured from an object to be measured into a plurality of light rays; a colorimetric optical system having a wavelength-selective filter on which the light that is to be measured and has been split by the splitting optical system is incident, and a light receiving sensor that receives the light that is to be measured and has been transmitted through the wavelength-selective filter; and a light attenuation member that is insertable in and removable from a light path of the light to be measured, in which the light attenuation member is disposed in front of the splitting optical system.

This application discloses an anti-interference error monitoring device, method, system, and electronic device, relating to the field of anti-interference circuit technology. The device includes a signal generation unit, a frequency-selective filtering network, and a digital processing module. The signal generation unit outputs a reference signal for error calibration. The frequency-selective filtering network is disposed between the signal generation unit and the secondary side acquisition circuit of the instrument transformer, used to couple the reference signal and the power frequency signal to form a mixed signal. The frequency-selective filtering network includes an isolation capacitor and a tuning inductor connected in series with the isolation capacitor. The tuning inductor and the isolation capacitor are configured to resonate in series at the reference signal frequency, resulting in low impedance at that frequency and high impedance at the fundamental power frequency and / or higher harmonic frequencies. The digital processing module is used to extract the signal components in the mixed signal and determine the error parameters. This application can be used for online error monitoring of instrument transformers.

An optical arrangement (807) for a head-up display (810) comprises one or more holographic optical elements (803) and a filter arrangement (811). The filter arrangement (811) comprises a micro-louvered grating and is designed for angle-selective filtering of light.

An integrated photonic device independently directs each channel of a multiplexed input optical signal received from a corresponding one of N input port to one of N output ports, each multiplexed input optical signal including N channels. The device includes: N input waveguides; secondary waveguides; wavelength-selective filters, each: i) including a ring resonator, ii) being optically coupled to a corresponding one of the N input waveguides and a corresponding one of the secondary waveguides, and iii) being switchable between a first state in which an optical signal in a corresponding one of the N channels is coupled from the corresponding input waveguide into the corresponding secondary waveguide and a second state in which the optical signal in the corresponding one of the N channels is not coupled into the corresponding secondary waveguide; N multi-wavelength mixers; and N output waveguides.

The invention discloses a terahertz filter based on a bound state theory in an accidental continuous spectrum. According to the filter, the periodically arranged rectangular silicon column array is designed on the surface of the silicon dielectric layer, so that high-Q-value resonance mode excitation is realized. On the premise that the structural symmetry is not damaged, the frequency response of the filter can be accurately adjusted by adjusting periodic parameters, and the application requirements of different terahertz frequency bands are met. Compared with the prior art, the method does not need to depend on complex structure breaking design, the problem of unstable performance caused by manufacturing errors is avoided, the manufacturing process is simplified, and the production cost is reduced. Experimental verification shows that the narrow-band and high-Q-value frequency selective filtering can be realized in a predetermined frequency band, and the narrow-band and high-Q-value frequency selective filtering device has low insertion loss and high signal-to-noise ratio, has a relatively strong practical application prospect, and particularly has wide application potential in the fields of terahertz communication, sensing, spectrum detection and the like.

A magnetic field sensor architecture is disclosed that provides improved bandwidth and noise performance through the use of three distinct magnetic sensing elements: a spinning Hall- effect sensor for low-frequency and DC sensing, a non-spinning Hall-effect sensor for mid- frequency sensing, and a pickup coil for high-frequency sensing. The sensor combination includes a summing stage comprising frequency-selective filtering elements that process the outputs of the sensing elements to achieve a flat composite frequency response from DC to high frequencies. Two independently selectable crossover frequencies are used to decouple noise optimization from ripple suppression. In some embodiments, the pickup coil and non- spinning Hall-effect sensors are combined and processed through a shared path, with a simplified filter structure.

The present invention is an ultraviolet wavelength selective filter. The wavelength selective filter includes a filter material. The filter material includes a main matrix doped with metal ions. The filter material has a transmission region within the deep ultraviolet (UV) range, so that UV light with a wavelength within the transmission region is transmitted through the filter material.

The invention discloses a sound source positioning system for multichannel ultrasonic signal processing. The sound source positioning system comprises a multichannel ultrasonic signal acquisition module, a self-adaptive anti-interference filtering module, a signal processing module, a multichannel data fusion module, a positioning calculation module and a real-time feedback control module, the multi-channel ultrasonic signal acquisition module comprises an ultrasonic sensor array; the self-adaptive anti-interference filtering module comprises a dynamic noise suppression unit, an intelligent spectrum analysis system and a frequency selective filtering unit; the signal processing module comprises a signal amplification unit, a self-adaptive phase correction system and a phase correction unit; the multi-channel data fusion module comprises a time delay estimation unit and a weight distribution unit; the positioning calculation module comprises a three-dimensional space positioning algorithm unit and an error compensation unit; and the real-time feedback control module comprises a signal return unit and a dynamic adjustment unit. According to the method, the anti-interference capability in a complex noise environment is remarkably improved, and the multi-channel signal processing efficiency and the stability of a positioning result are ensured.