23 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 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.

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.

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 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.

The application discloses a photosensitizer based on 1,8-naphthalimide and phototherapy application thereof, which is synthesized from 1,8-naphthalimide and acetylpyrrole as raw materials, through phosphorus oxychloride condensation, and then fluoroboration, and the synthesis method is very simple, and separation and purification are convenient. The compound has long-wavelength absorption characteristics due to its extended conjugated structure, and the optical characteristics enable the compound to be effectively applied to the field of photodynamic therapy.

One embodiment of the present invention provides a single-photon avalanche diode pixel array having a heterojunction structure, comprising: a substrate which has a trench and an avalanche amplification region formed, and is doped with a first conductive-type dopant; and a short wavelength absorption layer which is disposed inside the trench and is doped with the first conductive-type dopant, wherein the short wavelength absorption layer comprises a first region which is doped with the first conductive-type dopant, and a second region which is disposed on the first region and is formed on the upper surface of the short wavelength absorption layer by being heavily doped with the first conductive-type dopant, and the first conductive-type dopant has a concentration gradient increasing from the substrate toward the second region.

An optical filter with a light-absorbing layer formed by mixing several dyes on a transparent substrate, wherein the light-absorbing layer comprises: a first light-absorbing dye for the absorption of blue light in the wavelength range of 435 nm to 460 nm; and a second light-absorbing dye for the absorption of orange-red light in the wavelength range of 580 nm to 640 nm with an average wavelength absorption rate of more than 15%.