42 results about "Wavelength absorption" patented technology

The embodiment of the invention provides a connecting layer, a composite layer, a solar cell and a laminated cell. The connecting layer comprises a first transparent conductive layer and a hole transport layer which are stacked; and the hole transport layer is an alloy film containing Ga, Al, In, Sn, O and N elements. Component regulation and control are carried out on the hole transport layer, P-type doping is realized by utilizing a co-doping strategy, the hole concentration of a traditional tin oxide material layer is improved, long wavelength absorption is not remarkably increased, and in addition, multi-component doping can also avoid that a single component is easy to separate out and split phases.

The invention provides a multi-gas sensing detection method and device based on microwave modulation FLRD, the multi-gas sensing detection device is built based on microwave modulation FLRD, and the method comprises the following steps: determining characteristic frequency and shortest switching time; establishing a multi-wavelength absorption physical model; a gas concentration vector is solved by adopting a regularization inversion algorithm, and regularization parameters are optimized through cross validation; and temperature compensation is realized through an adaptive Kalman filtering algorithm. Compared with a traditional time domain pulse measurement mode, the method can accurately obtain the intra-cavity ring-down time without a high-speed pulse light source and an oscilloscope. According to the method, a network vector analyzer is used for extracting a system transfer function, high-sensitivity and low-noise gas absorption measurement is realized, and the system cost and complexity are remarkably reduced. Parallel recognition of multiple gas components can be realized through frequency domain analysis and a regularization inversion algorithm; and the Kalman filtering algorithm with temperature compensation is combined, so that the measurement stability and the environmental adaptability are effectively improved.

The application discloses a multi-band infrared polarization selection photoelectric detection array and a preparation method thereof in the field of photoelectric devices, and the photoelectric detection array comprises a transparent insulating substrate, and array-distributed internal unit pixel detectors are arranged above the transparent insulating substrate, wherein the internal unit pixel detectors comprise a gate electrode, an insulating layer, an active layer, a source-drain electrode and a photosensitive layer, the gate electrode is arranged above the transparent insulating substrate, the gate electrode is covered with the insulating layer, the active layer is arranged above the insulating layer, and the photosensitive layer and the source-drain electrode are arranged above the active layer. The photoelectric detection array can be combined with a polarimetry instrument and a chemical analysis platform device in aspects such as component identification and concentration detection of a liquid solution; the design and preparation of the field effect transistor photoelectric polarization selection device can simultaneously cancel a polaroid, realize integration of polarization angle detection and wavelength absorption detection, and can monitor the component and the concentration of the solution in a characteristic waveband of the solution.

The invention discloses a p < + >-NiO / p--NiO / GaN vertical structure photovoltaic detector based on an II type energy band. The structure comprises an n-GaN substrate, an i-GaN absorption layer located above the substrate, a p-NiO layer and a p +-NiO ohmic contact layer which are located above the absorption layer, and an AlN window layer, an anode electrode and a cathode electrode which are arranged on the i-GaN. The anode electrode is located on the side, away from the i-GaN layer, of the p-NiO layer, and the cathode electrode is located on the side, away from the i-GaN layer, of the n-GaN substrate layer. The invention also discloses a preparation method. The device provided by the invention has a self-powered capability, the responsivity of the device can be effectively improved through the design of an II-type energy band, light directly enters the absorption layer through the AlN wide-band-gap window layer, and the short-wavelength absorption loss is reduced.

The invention discloses a high-sensitivity natural gas leakage laser detection method, and particularly relates to the technical field of natural gas detection. A plurality of laser emission wavelengths are set and respectively correspond to characteristic absorption spectrum sections of natural gas and interference gas, a plurality of tunable lasers are utilized to synchronously emit laser beams, high-resolution multi-wavelength absorption spectrum data are acquired through a multi-channel optical receiving system, and spectrum preprocessing and spectrum abnormal characteristic extraction technologies are combined, so that the characteristic absorption spectrum sections of the natural gas and the interference gas are obtained. Data are input into the fused gas absorption characteristic prediction model for comprehensive analysis, accurate identification and concentration quantification of a target natural gas absorption spectral line are realized, an identification result and concentration information are finally output, real-time early warning is supported, and the method significantly improves the resolution and accuracy of a detection system in a low-concentration and complex-background gas environment, and has a wide application prospect. The problems that a traditional method is limited by single wavelength, strong interference and low sensitivity are effectively solved.

The present invention provides a solution-based method for preparing a gradient-bandgap copper indium gallium sulfide selenide solar cell, comprising the following steps: preparing a copper indium gallium sulfide precursor solution; preparing a silver indium sulfide precursor solution; preparing a copper indium gallium sulfide precursor film containing a silver indium sulfide layer; performing a selenization treatment to obtain a copper indium gallium sulfide absorber layer; and depositing a buffer layer, a window layer, and electrodes to prepare a copper indium gallium sulfide selenide thin-film solar cell with a gradient bandgap. The solution-based method for preparing a gradient-bandgap copper indium gallium sulfide selenide solar cell employs a method of inserting an AIS interlayer during spin-coating of the precursor film, thereby selenizing to obtain an absorber layer with a gradient bandgap. This method improves crystal quality while constructing a gradient bandgap, increasing the cell's long-wavelength absorption and ultimately enhancing device performance.

The application relates to a tunable metasurface absorber based on gallium oxide and graphene, which is composed of a plurality of unit structure period arrays, the unit structure comprises, from bottom to top, a substrate, a metal reflection layer, an intermediate dielectric layer, a metal array and a graphene layer, the material of the intermediate dielectric layer is gallium oxide, the metal arrays have the same thickness, and the structural parameters are set according to different functions. The device can realize single-wavelength absorption, multi-wavelength absorption and bandwidth absorption.

The present application provides an infrared thermopile sensor device, which includes a thermopile sensor formed on a base layer, the thermopile sensor including an absorption region, a cavity formed on the base layer, the absorption region suspended over the cavity of the base layer, the absorption region including a first metal layer, a dielectric layer and a second metal layer stacked, the first metal layer closer to the cavity of the base layer than the second metal layer, the dielectric layer of the absorption region between the first metal layer and the second metal layer, the second metal layer of the absorption region patterned to form a predetermined pattern. In this way, the infrared absorption rate is enhanced by making the metal layer into a predetermined pattern, the specific wavelength absorption rate is adjusted, and thus the performance of the infrared thermopile sensor device is improved.

The present invention relates to an optical laminate (101, 102, 103) comprising: a light reflection layer (20) including at least one cholesteric liquid crystal layer (10, 11) having an absolute value (|ΔR1-R2|) of the difference between an average reflectance (R1) in a wavelength range from 500 nm to 700 nm and an average reflectance (R2) in a wavelength range from more than 700 nm to 900 nm of 10.0 or less; a polarization element (23) including at least one dichroic dye; and a first support (21) and a second support (22) sandwiching the light reflection layer (20) and the polarization element (23). The first support (21), the light reflection layer (20), the polarization element (23), and the second support (22) are laminated in this order. A first adhesive layer (25) is disposed between the light reflection layer (20) and the first support (21), and a second adhesive layer (24) is disposed between the polarization element (23) and the second support (22). The first adhesive layer (25) contains at least one of a hue adjustment colorant and a specific wavelength absorption colorant.

The present application relates to a kind of dual optical path nitrogen dioxide measurement system and method based on blue laser, using dual-wavelength laser cavity enhanced absorption spectroscopy technology, carries out NO2 absorption measurement under 405nm and 410nm wavelength, and combined with high reflectivity optical resonator, improve detection precision and sensitivity.Through dual-wavelength comparison method, using dual-wavelength absorption spectroscopy analysis, calculate absorbance difference, to effectively eliminate the influence of environmental factors on measurement accuracy, improve measurement reliability.Using more than 99.9% high reflectivity mirror, to realize high reflectivity optical resonator enhancement technology, laser is reflected in resonator multiple times, optical path is extended hundreds of times, improve NO2 absorption signal intensity, realize ppb grade ultra-low concentration measurement.Compared with traditional optical method, the system has lower cost, higher accuracy and stronger environmental adaptability, provides an efficient, stable solution for atmospheric pollution monitoring.

The application discloses a high-conjugated photosensitizer with high ROS generation capacity and a preparation method thereof. The photosensitizer is prepared from halogenated BOPYIN as raw material, and is coupled with 4-diphenylaminophenylboronic acid under the catalysis of tetrakis(triphenylphosphine)palladium(0) and K2CO3 under the protection of N2. The synthesis method is simple, separation and purification are convenient, and the yield is high. An aromatic ring is introduced on the parent structure, so that the absorption spectrum is red-shifted and has strong stability. The compound has long-wavelength absorption characteristics due to the extended conjugated structure, and the optical characteristics enable the compound to be effectively applied in the field of photodynamic therapy.

The invention discloses a method for ratio type colorimetric detection of perchlorate. The method comprises the following steps: performing specific surface modification on gold nanoparticles, constructing a methylene blue functionalized gold nanoparticle (MB (at) AuNPs) colorimetric probe, inducing a particle aggregation effect by utilizing specific interaction between perchlorate and MB (at) AuNPs, triggering red shift of a localized surface plasma resonance absorption peak of the probe, and detecting the concentration of the MB (at) AuNPs. And a 523 nm (dispersed state characteristic peak) and 660 nm (aggregation state characteristic peak) dual-wavelength absorption signal is formed. Ratio-type quantitative analysis is realized by calculating the ratio (A660 / A523) of the absorbance of the two wavelengths, and the defect that single-signal detection is easily influenced by environmental fluctuation and system condition change is effectively avoided. Based on the response characteristics, a dual quantitative relation between the ratio of the concentration of the perchlorate to the absorbance and the ratio of the color intensity of an image collected by the smart phone is further established, and an ultraviolet-visible spectrophotometry-smart phone image analysis dual-mode detection system is constructed. Wherein the detection limit of the spectrum detection mode is 2.77 [mu] M, and the detection limit of the smart phone auxiliary detection mode is 5.63 [mu] M. The method is simple and convenient to operate, does not need a large-scale analytical instrument or complex sample pretreatment, has the advantages of good sensitivity, stability and visual discrimination, can quickly realize on-site screening and accurate quantification of perchlorate in water and food samples, and is high in practicability and wide in popularization prospect.

The application provides a tunable laser fiber grating demodulator with high demodulation speed and a demodulation method, to solve the technical problems of complex calibration trigger algorithm, long time consumption, low sensing precision and slow demodulation speed in the prior art. The demodulator comprises a data acquisition and processing unit, a computer, a frequency sweeping laser unit connected in sequence, and a first fiber coupler, an HCN gas absorption chamber, a second fiber coupler, two second photoelectric converters, a fiber splitter, N fiber loopers, N-way fiber grating sensors and N first photoelectric converters. The inlet end of the HCN gas absorption chamber is connected with the output end of the first fiber coupler, to absorb P fixed wavelength lights output by the first fiber coupler and output wavelength absorption lines. The outlet end is connected with the two second photoelectric converters through the second fiber coupler. The two second photoelectric converters are both used for converting the wavelength absorption lines into pulse signals, and are used as trigger signals and calibration signals respectively.

A pollution traceability system based on brown carbon optical characteristics and machine learning comprises an optical detection unit, a data preprocessing unit, a feature extraction unit, a machine learning analysis unit and a result output unit which are in data connection in sequence. The optical detection unit is used for carrying out on-line sampling on particulate matters in ambient air and acquiring brown carbon optical absorption and scattering data under a multi-wavelength condition; the data preprocessing unit performs background correction, noise suppression and environmental influence correction on the original data; the feature extraction unit constructs a multi-wavelength absorption feature, a spectrum slope feature and a time change feature based on the effective data; the machine learning analysis unit inputs the feature data into a pre-trained pollution source identification model, and outputs a pollution source type and a contribution analysis result; and the result output unit performs visual display, storage and external output. The system can realize automation, quantification and real-time traceability of the particulate matter pollution source, and is suitable for monitoring and management of a complex multi-source pollution environment.

Provided are a film having low light transmittance at a wavelength of 420 nm or less and excellent heat resistance, and a polarizing sheet, a heat-bend molded body, and sunglasses. A film according to the present disclosure includes an aromatic polycarbonate resin, an ultraviolet absorber having a triazine structure, and a specific wavelength absorption dye having a maximum absorption wavelength between wavelengths of 400-440 nm.

The invention discloses a shouldering method for growing yttrium vanadate crystals by a pulling method, a pulling method growth process of large-size crystals and the yttrium vanadate crystals, the shouldering method deconstructs the growth process into four stages, and quantitative interval control is performed on key parameters of each stage. Necking process parameters are standardized and coordinated with gradual adjustment of the included angle theta, so that stress slow release and defect screening in the early growth stage are realized; furthermore, the seed crystal immersion depth h is dynamically and finely adjusted, so that closed-loop control on the solid-liquid interface form is formed, and the ideal micro-convex state is maintained. According to the process, the undoped yttrium vanadate single crystal with the diameter not smaller than 80mm can be stably prepared, the 1064nm wavelength absorption coefficient of the undoped yttrium vanadate single crystal is lower than 0.005 cm <-5 >, the optical uniformity of the undoped yttrium vanadate single crystal is superior to 10 <-5 >, no macroscopic defect exists in the undoped yttrium vanadate single crystal, and the problems that large-size crystals are prone to cracking, multiple in defect and poor in consistency in the growth process are effectively solved.

The invention discloses a flame particulate matter particle size distribution reconstruction method based on multispectral radiation. The method comprises the following steps: step 1, measuring flame narrow band radiation intensity under multiple wavelengths by adopting multispectral imaging equipment; 2, iteratively calculating flame multi-wavelength absorption coefficient space distribution based on an L-M algorithm; 3, on the basis of a single-particle absorption efficiency series expansion formula, fitting solving is conducted on polynomial coefficients in the absorption coefficient-particle size function relation; and 4, according to the polynomial coefficient in the absorption coefficient-particle size function relationship of each point in the measured flame space, calculating the particle size space distribution of the measured flame particles. By means of the scheme, non-contact measurement of particle size distribution of particles in flame can be achieved based on the multispectral radiation image, the result is reliable, and precision is high.

An optical lens assembly includes at least three optical lens elements. At least one of the optical lens elements includes an infrared filtering coating, the optical lens element including the infrared filtering coating is made of a plastic material, the infrared filtering coating is arranged on an object-side surface or an image-side surface of the optical lens element, a surface of the optical lens element including the infrared filtering coating is aspheric, and the infrared filtering coating includes at least two different refractive indices. At least one of the optical lens elements includes a long-wavelength absorbing material, and the optical lens element including the long-wavelength absorbing material is made of a plastic material.

The invention discloses a device for full-automatically judging COD concentration and a using method thereof.The device comprises a COD rapid tester body, the right side of the COD rapid tester body is connected with a probe through a wire, the probe adopts a deep ultraviolet LED light source, the deep ultraviolet LED light source adopts a dual-wavelength or multi-wavelength absorption technology, and the probe is connected with a water pump through a water pump. Multi-parameter direct real-time compensation is realized, and the deep ultraviolet LED light source adopts a multi-wavelength coaxial light path design. Through the dual-wavelength or multi-wavelength absorption technology of the deep ultraviolet LED light source, the multi-wavelength coaxial light path design and measurement and the reference dual-channel measurement, the COD concentration is automatically calculated and compared with the preset threshold value in cooperation with the data processing unit, high and low concentration judgment can be completed without manual intervention, manual operation errors are reduced, the detection efficiency is greatly improved, and the detection cost is reduced. The protection limiting assembly provides stable protection for the COD rapid tester body through cooperation of a protection sleeve, a limiting block and a rubber gasket.

To provide a light-emitting device with high emission efficiency and high reliability. A light-emitting layer of the light-emitting device includes a first substance emitting light from a doublet excited state based on f-d transition and a second substance that is a fluorescent substance. The longest-wavelength absorption edge among absorption edges in the absorption spectrum of the first substance is positioned at a wavelength shorter than the wavelength of the longest-wavelength absorption edge among absorption edges in the absorption spectrum of the second substance. The first substance has a short exciton lifetime and high exciton generation efficiency, and efficient energy transfer occurs between the first substance and the second substance; thus, the light-emitting device can have high emission efficiency and high reliability.

This invention discloses a multi-wavelength extreme ultraviolet (EUV) benchtop light source based on absorption spectral lines, belonging to the field of special light source technology. This invention utilizes a high-power laser to ablate a target material with a high atomic number to generate continuous spectral emission in the EUV band. After being collected by a collecting mirror, the emission passes through a neutral or ionized gas to produce multi-wavelength absorption spectral lines with excellent monochromaticity. This is used for spectral calibration of EUV instruments and equipment, and can generate line spectra with monochromaticity reaching 6 × 10⁻⁶ in the 10–120 nm band. ‑5 This invention provides a high-brightness, tabletop light source with multiple wavelengths. By adjusting the laser power within the range of mW or even 100W, this isotropic, point-like incoherent light source can be easily expanded to an aperture of tens of centimeters, meeting the spectral calibration requirements of various devices and instruments.

The invention discloses a donor-receptor supramolecular compound as well as a preparation method and application thereof. The donor-acceptor supramolecular compound is formed by supramolecular self-assembly of donor molecules and acceptor molecules according to a molar ratio of 1: 1, and the donor molecules are any one of trans-1, 2-stilbene, naphthalene, anthracene, pyrene, triphenylene, perylene, carbazole, 9, 9-dimethyl acridine, phenoxazine, 2, 3, 6, 7, 10, 11-hexamethoxy triphenylene, tetrathiafulvalene or dibenzotetrathiafulvalene; the receptor molecule is 1, 4, 5, 8, 9, 11-hexaazabenzonitrile, and the receptor molecule is 1, 4, 5, 8, 9, 11-hexaazabenzonitrile. The donor-acceptor supramolecular compound obtained by the invention not only has near-infrared long-wavelength absorption, but also has a wide absorption range; in addition, the material also has relatively high photothermal conversion performance and relatively good photothermal stability, and has a good application prospect in the aspect of heater materials.

The application discloses a kind of carbon point regulation copper and cuprous oxide ratio nanocomposite preparation method, which utilizes the cuprous oxide on the electron-deficient group such as carboxyl group adsorbed on the surface of carbon point and is not easy to be reduced to zero by ascorbic acid, effectively protects the cuprous oxide around carbon point, plays the regulation role of copper and cuprous oxide component, while the transient photocurrent response is excellent, and more photo-generated electrons are generated.The nanocomposite preparation method disclosed in the application can produce a wider wavelength absorption range and has stronger light capturing capacity.

An emulsion spectrum fluid filter capable of controlling light wavelength absorption includes a transparent channel formed as a tube of a 90 degrees-rotated U shape, and an emulsion received in the transparent channel, wherein the emulsion may include dispersed oil and surfactant. Further, a method for preparing the emulsion is disclosed.

An optical lens assembly includes at least three optical lens elements. The at least three optical lens elements include, in order from an object side to an image side of the optical lens assembly, a first optical lens element, a second optical lens element and a third optical lens element. The at least three optical lens elements include a blue-glass lens element, and the at least three optical lens elements include a long-wavelength absorbing lens element.

The invention provides an optical lens and an electronic device, the optical lens comprises at least three optical lenses, and the at least three optical lenses comprise a first optical lens, a second optical lens and a third optical lens from the object side to the image side of the optical lens. The at least three optical lenses comprise a blue glass lens, and the at least three optical lenses comprise a long wavelength absorbing lens or a long wavelength filtering lens. Therefore, by adding the blue glass material in the optical lens, a blue glass plate can be omitted to prevent visible light from being reflected to the photosensitive element, petal-shaped solar flares can be reduced, and the imaging quality can be improved.

The application belongs to the technical field of photothermal conversion materials, and discloses the use of 2,3,5,6-pyrazine tetranitrile as an acceptor in the preparation of a donor-acceptor supramolecular complex photothermal conversion material. The donor-acceptor supramolecular complex photothermal conversion material prepared by using 2,3,5,6-pyrazine tetranitrile as an acceptor not only has long-wavelength absorption in the near infrared, a wide absorption range, and good absorption intensity, but also has excellent photothermal conversion capacity and good photothermal stability, and has great application potential in the fields of seawater desalination, sterilization, biological photodiagnosis and treatment, and the like.

The utility model provides an inner-spraying and outer-liquid-absorbing film cooling type skin flap low-damage laser cutting device which comprises a three-axis movement mechanism, an inner-spraying and outer-liquid-absorbing film cooling cutting head, a laser device, a negative-pressure skin fixator, a liquid supply device and a liquid pumping device. The inner-spraying and outer-liquid-absorbing film cooling cutting head comprises an upper shell, a focusing device and a lower shell. A laser light path of the laser emitting laser downwards is arranged in the inner cavity of the upper shell; the focusing devices are arranged in inner cavities of the lower part of the upper shell and the upper part of the lower shell, the upper parts of the inner cavities are communicated with a laser light path, and the lower parts of the inner cavities are communicated with positive pressure cavities positioned in the middle and the lower part of the lower shell; the focusing device is coaxial with a laser light path emitted by the laser. The utility model has the beneficial effects that the laser wavelength absorption efficiency of the skin tissue is high, the cutting speed is high, the skin making time is short, the cutting precision is high, and the postoperative skin grafting survival rate is high; the skin making precision is high; the economic benefit is good.

The purpose of an embodiment of the present invention is to provide a single-photon avalanche diode pixel array comprising: a substrate including an avalanche amplification region; a first insulating layer disposed on the substrate and having a trench formed in a region corresponding to the avalanche amplification region; a short-wavelength absorption layer filling the inside of the trench; and a first metal oxide layer formed between the first insulating layer and the short-wavelength absorption layer inside the trench .

The application provides a method for in-situ preparation of gallium oxide nanostructure on a metal substrate, and the method comprises the following steps: (1) coating molten gallium on the surface of the metal substrate, and performing one-step heat treatment to form a solid alloy phase; (2) under the action of a catalyst, the surface of the solid alloy phase is subjected to two-step heat treatment to obtain the gallium oxide nanostructure on the surface of the metal substrate, the method can quickly obtain a gallium oxide / metal substrate heterostructure, the gallium oxide nanostructure on the surface of the metal substrate is uniformly distributed, and the gallium oxide nanostructure can be prepared in a large area to meet different requirements. The heterostructure has great application potential in the aspects of optoelectronic devices, sensors, photocatalytic environmental purification and wide-wavelength absorption.