226 results about "Broad band" patented technology

Systems and methods can facilitate wide broad-band IVUS for peripheral vascular applications with simultaneous improved resolution and penetration depth. A custom analog front end interface can withstand large voltages and recover to receive a sub-mV pulse from less than one mm away. The custom analog front end interface can be on an interface chip that can be sized to be integrated within a tip of the IVUS catheter to connect micro-cables within the IVUS catheter to the broad-band transducer. The interface chip can also include a dual-stage amplifier having a pulse mode configured to withstand voltage pulses greater than 30 VPP during pulsing and an echo reception mode configured to receive sub-mV echoes during echo reception.

The invention discloses a laminated solar cell structure containing a selective reflection / light transmission optical thin film. The laminated solar cell structure comprises a wide-band-gap solar cell, the selective reflection / light transmission optical thin film and a narrow-band-gap solar cell which are sequentially arranged in the light incidence direction. The selective reflecting / light-transmitting optical thin film is at least used for 1) reflecting high-energy photons to be absorbed and utilized by the wide-band-gap solar cell; and 2) low-energy photons are transmitted to be absorbed and utilized by a narrow-band-gap solar cell. According to the invention, the selective reflection / light transmission optical thin film is used to fully reflect the transmitted high-energy photons to the wide-band-gap top cell without influencing the transmission of low-energy photons, so that the absorption and conversion of the wide-band-gap top cell to the high-energy photons can be improved, the photoelectric conversion efficiency of the laminated cell can be effectively improved, and the laminated cell has a good application prospect.

The invention discloses a fano resonance-based color radiation refrigeration film and a preparation method thereof, the film comprises a structure M1D1M2D1AD 'which are sequentially stacked from bottom to top, the structure of the film is an asymmetric structure, M1 represents a first metal layer, M2 represents a second metal layer, A represents an absorption layer, D1 represents a first dielectric layer, and D' represents a symmetrical dielectric layer unit of a film material; the M1D1M2 structure is in a discrete state and serves as a narrow-band light absorber, the M2D1AD'structure is in a continuous state and serves as a broadband light absorber, D 'serves as an antireflection layer in a continuous state, and the narrow-band light absorber and the broadband light absorber are coupled by sharing the second metal layer M2 to achieve fano resonance. The high-purity and color-adjustable reflection type structural color is achieved, the high reflectivity is achieved in the solar spectrum wave band, the high emissivity is achieved in the atmosphere window, and therefore the excellent radiation refrigeration effect is achieved.

A system or Access Point having a split band architecture. A first radio communicates with a 6G front end module (FEM) that is connected to a first filter switch bank (FSB) configured to enable a 6G high bandpass filter, a 6G wide bandpass filter, or a 6G narrow bandpass filter. A second radio communicates with a 5G FEM that is connected to a second FSB configured to enable a 6G low bandpass filter, a first 5G low bandpass filter, a 5G wide bandpass filter, or a 5G narrow bandpass filter. A third radio communicates with a 2-5G dual band FEM that is connected to a third FSB configured to enable a 6G full bandpass filter, a 5G high bandpass filter, or a second 5G low bandpass filter. The 2-5G dual FEM may also be connected to a fourth FSB configured to enable a 2G application.

The invention provides in embodiments a light generating system (1000) comprising a first light generating device (100), a first luminescent material (210), and a second luminescent material (220), wherein: A) the first light generating device (110) is configured to generate first device light (111), wherein the first light generating device (110) comprises a first light source (10) selected from the group of a superluminescent diode and a laser; B) the first luminescent material (210) comprises a line absorber and line emitter luminescent material providing a first luminescent material emission (211) comprising a line emission at a first wavelength (λL,1) upon excitation with the first device light (111); C) the second luminescent material (220) comprises a broad band emitter luminescent material providing a second luminescent material emission (221) comprising a broad band emission upon excitation with the first device light (111), wherein the second luminescent material emission (221) has a second centroid wavelength (λLC,2), wherein |λL,1-λLC,2|≤20 nm; D) the first light generating device (110) is configured to pump one or more of the first luminescent material (210) and the second luminescent material (220) with the first device light (111); and E) the light generating system (1000) is configured to generate system light (1001) comprising one or more of the first luminescent material emission (211) and the second luminescent material emission (221).

A calibration light source includes: a broad band light source emitting light in a broad spectral range; and a filter receiving light emitted by the broad band light source and providing structured light by imposing an attenuation pattern exhibiting pattern features at multiple spectral reference lines on the received light such that an emission spectrum of the structured light emitted by the calibration light source exhibits distinct, identifiable emission spectrum features corresponding to the pattern features at the multiple spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is further disclosed.

The invention relates to a method for calibrating a spectrometric measuring device (20) using a spectrometric calibration device (01). The calibration device (01) comprises a control unit, an interferometer with mirrors (02, 03) and a beam splitter (04), a broadband first radiation source (06), a laser (07) as a second radiation source, and a first detector (08). The method includes emitting broadband radiation (12a) and simultaneously emitting radiation (12b) by the laser (07), as well as simultaneously coupling these two radiations (12a, 12b) into the interferometer of the calibration device. A first interferogram is acquired based on the radiation (12b) of the laser (07). A second interferogram is acquired based on the broadband radiation (12a). A first data set with the spectral properties of the spectrometric measuring device (20) is created on the basis of the recorded interferograms.A second dataset, consisting of high-resolution sample spectra and chemically determined constituent values, is provided. Simulated sample spectra are calculated from the two datasets. A chemometric calibration model for the measuring device (20) is created from the simulated sample spectra. The invention also relates to a spectrometric calibration device (01).

A transistor comprising a first drain region split into first and second drain sub-regions aligned lengthwise and separated by a first low conductivity region, a first source region disposed on a first side of the first drain region split into first and second source sub-regions aligned lengthwise and separated by a second low conductivity region, a second source region disposed on a second side of the first drain region opposite the first side, the second source region split into third and fourth source sub-regions aligned lengthwise and separated by a third low conductivity region, a first gate electrode finger disposed over first and second active regions between the first drain region and first source region, and a second gate electrode finger disposed over third and fourth active regions between the first drain region and second source region.

The invention relates to the technical field of solar cells, in particular to a wide-band-gap perovskite solar cell and a preparation method thereof. The preparation method comprises the following steps: preparation of the ITO layer, O2-plasma treatment of the ITO layer, preparation of the hole transport layer, preparation of the perovskite light absorption film layer, coating of PEAI post-treatment salt, preparation of the thermal evaporation C60 electron transport layer, preparation of the SnO2 electron transport layer by an atomic layer deposition method, plating of the ITO transparent conductive electrode by a magnetron sputtering technology, preparation of the metal gate line, and evaporation of the MgF2 antireflection layer. The organic fluorescent material NPBI2 which absorbs ultraviolet light and converts the ultraviolet light into visible light is doped into the perovskite light absorption layer, so that the damage of the ultraviolet light to perovskite is avoided, the perovskite can absorb the visible light to generate power and improve the photoelectric conversion efficiency, and the organic fluorescent material can passivate crystal defects in the perovskite light absorption layer and improve the quality of the perovskite thin film. And the carrier lifetime is prolonged.

The invention discloses a full-perovskite laminated solar cell and a preparation method thereof, and relates to the field of solar cells, and the full-perovskite laminated solar cell comprises a transparent substrate layer, a first electrode layer and a first broadband gap sub-cell function layer which are sequentially stacked in the direction of incident light. One side, far away from incident light, of the transparent substrate layer is a suede; the first electrode layer covers the transparent substrate layer with uniform thickness; the first wide-band-gap sub-cell functional layer covers the first electrode layer with uniform thickness; the first electrode layer is a transparent electrode. The micro-nano structure provided by the invention is stable in anti-reflection effect, and is suitable for all-perovskite laminated solar cells of different materials and configurations; the light absorption capacity of the working spectral band of the solar cell can be remarkably improved, the light current is greatly improved, the device is easy to prepare, no extra technological process needs to be introduced to enable perovskite and the micro-nano structure to grow in a conformal mode, and the technical requirement and the production cost of the production process are remarkably reduced.

The invention belongs to the technical field of organic photoelectricity, and particularly relates to a polymer material containing a dithiazolobenzothiophene structural unit and application of the polymer material in an organic solar cell. The polymer material has a molecular structure as shown in formula (I), and substituent groups are described in the specification. According to the invention, a dithiazolobenzothiophene unit is used as an electron withdrawing unit to be introduced into the polymer to construct a broad-band gap donor material, and the polymer material has good crystallinity and donor-acceptor compatibility at the same time, and can obtain relatively high carrier mobility and photovoltaic performance; when the material is applied to organic solar cells, the energy conversion efficiency (PCE) can exceed 19%, and the material has a good application prospect. # imgabs0 #

A method and a system have been developed to calibrate the total spectral radiance factor (TSRF) obtained from different instruments. A broad-band light source covering the whole visible range as well as the fluorescence excitation wavelengths is used to measure the TSRF, and one or more narrow-band light sources outside of the fluorescent band is used to measure fluorescent spectral radiance factor (FSRF) separately. After that, the TSRF is adjusted by the FSRF, and a calibrated TSRF can be obtained. This can be applied to characterize Optical Brightening Agents (OBAs) as well as other fluorescent materials without requiring any moving part of the instrument to do the calibration.

The invention discloses a multi-metal-component high-entropy metal organic framework material and a preparation method thereof, and belongs to the technical field of new material technology development and environmental governance, and the multi-metal-component high-entropy metal organic framework material is mainly used as a photocatalysis and photo-Fenton material for degrading azo dye pollutants. The high-entropy metal organic framework is prepared by taking various transition metal ions as inorganic components in the framework and polycarboxylic acid functional group ligands as organic components of a framework material, and heating the inorganic components and the organic components in a mixed solvent under the protection of nitrogen to coordinate and self-assemble the inorganic components and the organic components. The selected metal ions and organic ligands are low in cost, the preparation condition is simple, the yield is high, and the obtained multi-metal-component high-entropy metal organic framework material has good photocatalysis and photo-Fenton degradation performance on monoazo dyes under the visible light wave band; the problems of wide band gap, low response to visible light, poor photon-generated carrier separation capability and the like of conventional monometal component MOFs are solved, and a new scheme is provided for an environment restoration material.

An inspection device is disclosed herein. The inspection device may comprise: a support structure; a motor; a shaft operably coupled to the motor, the shaft extending from a first side of the support structure to a second side of the support structure, the shaft configured to couple to a bladed rotor; an optical device moveably coupled to the support structure; and a broad-band energy source configured to generate acoustic energy through the bladed rotor during inspection.

The invention discloses a preparation method and application of an imine-linked covalent organic framework material, and belongs to the technical field of photocatalysis. The invention aims to solve the problems that the conventional H2O2 preparation method is high in energy consumption, complex in process, high in cost and not suitable for large-scale production, and the conventional imine-linked COF synthesis method is complex in step, time-consuming in synthesis and single in synthesis method. On the basis of adopting an aldehyde monomer acid pre-activation strategy for the first time, all reactants are directly added into a reaction kettle to be mixed, the imine-linked covalent organic framework material is rapidly synthesized through a solvothermal method, compared with a conventional method, the reaction conditions are simple and convenient to operate, time is saved, and the cost is reduced. The obtained material has the advantages of wide visible light absorption range, narrow band gap, high crystallinity, high photocatalytic activity, high yield and the like; and the obtained imine-linked covalent organic framework material photocatalytic material has good H2O2 production capacity under all light, and has very high practical value.

The invention provides an amide-based additive and an application thereof in preparation of a perovskite solar cell. The molecular structural formula of the acylamino additive is shown as a formula I; r in the formula I is selected from any one of-H,-CH2OH,-CH2Cl and-CH = CH2. According to the invention, the amide-based additive is used in the hole transport layer and the perovskite light absorption layer and can be neutralized with PEDOT / PSS of the hole transport layer in the narrow-band-gap perovskite solar cell, so that the reaction between the PEDOT / PSS and perovskite is slowed down, and the growth of perovskite grains is promoted. Meanwhile, when the film is used for a narrow-band-gap perovskite light absorption layer, an amide group can be oxidized into carboxylic acid, oxidation of Sn < 2 + > in a perovskite precursor is avoided, and the defects of the film are reduced; the Pb vacancy is filled and combined by an amide group when the Pb vacancy is applied to a wide-band-gap perovskite absorption layer, so that the defect of a passivated film is improved; therefore, the perovskite energy level is better matched, the film quality is improved, and the photoelectric conversion efficiency and the stability of the perovskite solar cell can be remarkably improved.

A multifunction portable illumination system includes a housing having a power source. A broadband illumination source connected to the power source and capable of producing broadband illuminating light. The system includes an imaging disruption assembly including at least one narrow-band light source capable of generating one or more high intensity light beams (HILB) and a light modifying assembly configured to modify the one or more HILB to produce a Modified HILB. At least one Modified HILB may have the requisite irradiance to cause disruption of an imaging system.

A delivery fiber assembly suitable for delivering broad band light and including a delivery fiber and a connector member. The delivery fiber has a length, an input end for launching light and a delivery end for delivering light. The delivery fiber includes along its length a core region and a cladding region surrounding the core region wherein the cladding region includes a cladding background material having a refractive index Nbg and a plurality of microstructures in the form of inclusions of solid material having refractive index up to Ninc and extending in the length of the longitudinal axis of the delivery fiber, wherein Ninc<Nbg. The plurality of inclusions in the cladding region is arranged in a cross-sectional pattern comprising at least two rings of inclusions surrounding the core region.

A guide light irradiation device that emits guide light (16) to show a direction to a surveying worker, wherein an optical system of the guide light irradiation device includes an irradiation lens (15), an irradiation prism (14), and a light source (13), the light source is a broadband light source that emits light in a broad band, a coloring element (17) having two regions with different spectral characteristics is provided on a light incidence surface of the irradiation prism, the light emitted from the broadband light source enters the irradiation prism through the regions as guide light containing light of two colors, and the guide light is irradiated from the irradiation lens after being internally reflected at least twice inside the irradiation prism.

To provide a radio wave absorber which solves the problems that a conventional radio wave absorber of a foamed resin is not suitable for outdoor use in aspects of water resistance, humidity resistance and impact resistance, a conventional flat-surface and multi-layer radio wave absorber has a narrow band and is not suitable for applications of an outdoor inspection device and the like by high-resolution millimeter-wave radar, therefore, can simultaneously achieve suitability for outdoor use, wide band property and good reflection characteristic and has a simple structure.SOLUTION: A layer of a magnetic material is provided on the surface of a pyramid shape or a wedge shape using a non-foamed resin containing a carbon fiber.SELECTED DRAWING: Figure 1

Disclosed is a system and method for solid-state 2D optical phased arrays (OPAs), which are fabricated from InGaN / AlGaN multiple quantum wells (MQWs) and AlyGa1-yN / AlxGa1-xN (y<x) MQWs. The InGaN / AlGaN MQWs and AlyGa1-yN / AlxGa1-xN (y<x) MQWs include alternating p-type and n-type layers to form p-n-p-n MQW structures to allow the OPA to operate in the reversed biased configuration to further minimize the operating current and heat generation. The phase in each pixel within the OPA will be controlled independently via electro-optic effect in III-nitride MQWs by varying the voltage in each pixel by a Si CMOS array to achieve the manipulation of the distribution of optical power in the far field and steering of the main laser beam. The present disclosure is applicable to a wide range of applications, including the operation of LIDAR systems, laser weapons, laser illuminators, and laser imaging systems.

A calibration light source includes: a broad band light source emitting light in a broad spectral range; and a filter receiving light emitted by the broad band light source and providing structured light by imposing an attenuation pattern exhibiting pattern features at multiple spectral reference lines on the received light such that an emission spectrum of the structured light emitted by the calibration light source exhibits distinct, identifiable emission spectrum features corresponding to the pattern features at the multiple spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is further disclosed.

The application discloses a trace element detection system and method, and belongs to the technical field of spectral quantitative detection. The system comprises a laser, a sample stage and a spectral signal acquisition system. The laser ablates a sample to generate plasma after passing through a half-wave plate, a Glan prism, a dichroic mirror and a lens group. The acquisition system comprises a wide / narrow band spectral signal collection system and a trigger system: the wide band system comprises an axial and first lateral light path, couples full spectrum signals to a spectrometer, and is used for matrix identification; the narrow band system comprises a second lateral collection lens, a light splitting element and a UV / visible double channel, each channel is sequentially provided with a neutral density filter, an ultra-narrow band filter and a plano-convex lens, and is connected to a photomultiplier tube to an oscilloscope, and high-sensitivity detection of specific element characteristic spectral lines is realized; and the trigger system is used for triggering the spectrometer to acquire. The wide band and narrow band collaborative architecture is adopted, and both material matrix identification and high-precision quantitative detection of trace elements are considered.

A method and an apparatus are described that split a broadband optical signal into a plurality of narrow-band portions. Each of said narrow-band portions is combined in the same optical channel with an optical local oscillator (OLO). Furthermore, the OLO is spectrally separate from, or non-overlapping with, the corresponding narrow-band portion of the signal in the same channel. This functionality is achieved by launching the broadband optical signal and a local oscillator optical comb (LOOC) into separate waveguides at the input star coupler of an arrayed-waveguide grating. The waveguides of the output star coupler carry the narrow-band portions of the broadband optical signal along with the respective non-overlapping spectral lines of the OLO.

A noise cancellation system (100) with harmonic filtering for a vehicle audio system, comprising: at least one first input sensor configured to receive a reference signal (x rn [n], (x rb [n]); at least one second input sensor configured to transmit a narrowband input signal and a wideband input signal, each of the narrowband input signal and the wideband input signal including harmonic noise; a processor (105) programmed to: Receiving the reference signal, where the reference signal (x rn [n], (x rb [n]) a narrowband reference signal (x rn [n]) and a broadband reference signal (x rb [n]), Applying a first adaptive filter (160, 174) to each of the reference signals (x rn [n], (x rb [n]), Applying a secondary path (176) to the reference signals (x rn [n], (x rb [n]) to generate anti-noise signals, Summing (178) the anti-noise signals sent via the secondary path (176) and the input signals to produce an error signal (E m [n]) and Applying a second adaptive filter (182) to the error signal (E m [n]) to remove overtone noise to prevent overtone noise suppression.

A vehicle propulsion system including a battery for supplying a direct current (DC), an inverter including a wide band gap transistor for converting the DC to an alternating current (AC) in response to a transistor control signal applied to a gate of the wide band gap transistor, a high voltage power switch coupled in anti-parallel with the wide band gap transistor to provide a path for the current when the wide band gap transistor is turned off, an inverter controller including a power supply for supplying a DC current, a current sensor for detecting a current level of the DC current, and a high voltage transistor for generating the transistor control signal in response to a variation of the current level and the DC current, and an electric motor configured to generate an electromotive torque in response to the AC voltage to propel a vehicle.

The application discloses a preparation method of a wide-bandgap perovskite photoactive layer, and comprises the following steps: S1, lead iodide powder, cesium iodide powder and ytterbium bromide powder are proportioned according to a proportioning molar ratio, and an inorganic target material is prepared by using a hot-press sintering process; S2, formamidinium hydriodide powder and methylammonium bromide powder are proportioned according to a proportioning molar ratio, and an organic target material is prepared by using a normal-temperature preparation process; S3, a pretreated substrate is placed on a magnetron sputtering sample table, the target materials prepared in steps S1 and S2 are respectively installed on corresponding radio frequency sputtering targets, and the background of a magnetron sputtering system is vacuumized; S4, high-purity argon gas is used as a sputtering gas, and a wide-bandgap perovskite thin film is prepared by using a magnetron co-sputtering method; the sputtering power of the inorganic target material prepared in step S1 is controlled, the sputtering power of the organic target material prepared in step S2 is controlled, and the thickness of the thin film is controlled, so that the high-quality thin film is prepared by using the differential target material preparation process.

The invention discloses a wide-band-gap perovskite solar cell and a full-perovskite laminated solar cell. Methyl ammonium bromide and guanidine bromide are jointly doped into the perovskite precursor solution to partially replace formamidine iodide, and a multi-element A-site alloy structure is introduced into the perovskite solar cell, so that defects in a perovskite layer are reduced, the service life of a carrier is prolonged, surface non-radiation is inhibited, the voltage loss of a device is reduced, and the performance of the device is improved. Therefore, the performance of the perovskite solar cell is obviously improved.

The invention relates to the technical field of new energy, and discloses a perovskite thin film band gap gas phase broadening processing method and a solar cell based on the perovskite thin film band gap gas phase broadening processing method.The band gap broadening method comprises the steps that firstly, a narrow-band-gap perovskite thin film is prepared and placed in a closed cavity, and meanwhile a gas phase broadening processing material is placed in the closed cavity; the cavity is vacuumized, and the target pressure intensity is regulated and controlled; heating the chamber to sublimate the broadening material into a gas-phase atmosphere, and realizing a gas-phase diffusion broadening reaction through temperature and pressure preservation; and finally, carrying out annealing treatment to obtain the wide-band-gap perovskite thin film. The method can realize accurate and controllable regulation and control of the perovskite material band gap, does not need to use toxic and harmful solvents in the whole process, is compatible with a plurality of initial film forming processes such as a wet method and a dry method, provides a green and industrialized technical scheme for preparation of the efficient wide-band-gap perovskite material, and has wide application prospects. The method is especially suitable for the preparation requirement of the wide band gap material for the top cell of the laminated solar cell.

The invention discloses an optical test system and test method for measuring the total temperature of a supersonic flow field, and relates to the field of supersonic flow field measurement, and the optical test system comprises a static temperature measurement system, a speed measurement system and a time schedule controller. The static temperature measuring system is used for generating narrow-band pump light, probe light and broadband Stokes light, converging the narrow-band pump light, the probe light and the broadband Stokes light, emitting the converged light into a measured position of a flow field to generate anti-Stokes light, and acquiring the filtered anti-Stokes light to obtain the static temperature of the measured position; the speed measuring system is used for generating laser, focusing the laser into the flow field, acquiring motion information of the marked substance, and calculating the airflow speed of the measured position based on the motion information of the marked substance; the time schedule controller is used for controlling the static temperature measuring system and the speed measuring system to work synchronously to obtain the static temperature at the measured position and the airflow speed at the measured position at the same moment; the calculation unit is used for calculating the total temperature of the corresponding area of the measured position based on the static temperature of the measured position and the airflow velocity of the measured position; according to the invention, the problems that the flow field structure is invaded and damaged and the invading piece is ablated and invalid under the condition of high total temperature in the current contact measurement can be solved.