717 results about "Emission spectrum" patented technology

The invention provides a boron-nitrogen heterocyclic compound as well as an intermediate and a preparation method thereof, the boron-nitrogen heterocyclic compound has a structure as shown in a general formula (1), and is prepared by taking compounds as shown in a formula A, a formula B and a formula C as intermediates. Compared with similar carbon skeleton molecules, the boron-nitrogen heterocyclic compound provided by the invention shows an excellent narrow-band luminescence property. The half-peak width of the emission spectrum of the boron-aza compound is as low as 6.4 nm, and meanwhile, the fluorescence quantum yield is as high as 97%.

The invention belongs to the technical field of OLEDs, and provides a polycyclic compound containing triphenyl silicon and a polyalkyl substituent group and an organic electroluminescent device containing the polycyclic compound. The structural general formula of the polycyclic compound is as shown in formula I in the specification. Benzofuran with higher electronegativity is introduced to a ring structure composed of nitrogen atoms and boron atoms, triphenyl silicon is introduced to the para-position of boron, and the synergistic effect of benzofuran and triphenyl silicon can significantly enhance the multiple resonance of a light-emitting core and reduce vibration relaxation. Due to simultaneous use of the benzofuran and the triphenyl silicon, the problems of vibration relaxation increase, spectrum widening and the like caused by introduction of the polyalkyl substituent are remarkably improved, the luminous efficiency of the material is remarkably improved, and the color purity is improved, so that the requirement of BT.2020 wide color gamut display standard on a luminescent spectrum is met. I

A method is presented for locating charge traps in a crystal lattice. The method includes: arranging a local probe having an inversion-symmetric lattice defect, wherein energy levels of the lattice defect are non-linearly Stark-shiftable by means of charge traps in the crystal lattice; determining Stark-shifted photoluminescence emission spectra, wherein each of the photoluminescence emission spectra is determined in a respective scanning operation by means of photoluminescence excitation in the crystal lattice; determining an integrated spectrum by integrating the photoluminescence emission spectra; determining jump probabilities from consecutive ones of the photoluminescence emission spectra and determining a charge trap configuration from the jump probabilities; determining simulated spectra by means of Monte Carlo simulation based on the determined charge trap configuration and a resulting Stark shift; and determining an optimal spatial arrangement of the charge traps neighboring the local probe by comparing the integrated spectrum with the simulated spectra.

The invention relates to the technical field of biological microscopic imaging, and discloses a deconvolution super-resolution imaging method and device based on deep learning denoising and a medium. The method comprises the following steps: acquiring a to-be-denoised image of a to-be-imaged structure marked by fluorescent molecules; de-noising the image to be de-noised by using a preset image de-noising neural network to obtain a de-noised image; a training data set for training the network is generated by utilizing the optical switch characteristics of optical switch fluorescent molecules, and the optical switch fluorescent molecules are used for marking to-be-imaged structures of samples in the training data set; the emission spectrum of the fluorescent molecules is overlapped with the emission spectrum of the fluorescent molecules of the optical switch; and carrying out deconvolution processing on the denoised image to obtain a super-resolution imaging image. According to the invention, the large-scale and high-quality true value image is obtained by using the optical switch characteristic of the optical switch fluorescent molecules, and the denoising effect of the image denoising neural network is improved; and denoising the image by using the network, and then carrying out deconvolution on the denoised image to realize large-view living cell single-frame super-resolution imaging.

The invention provides a display control method and system for a liquid crystal display screen, and the method comprises the steps: carrying out the nonlinear spectrum mapping processing of an input RGB drive value, and obtaining a theoretical emission spectrum through combining with the response characteristics of liquid crystal molecules; calculating a reflection spectrum component in the multilayer structure according to the ambient light spectrum, and superposing the reflection spectrum component with the theoretical emission spectrum to obtain an actual observation spectrum; calculating a difference value between the actual observation spectrum and the target spectrum, and converting the difference value into an RGB correction value through a constraint optimization algorithm to obtain an RGB driving value after ambient light compensation; and calculating actual white point color coordinates, and adjusting the actual white point color coordinates to a standard white point position through a progressive white point migration algorithm. Display parameters can be dynamically adjusted according to real-time ambient light conditions, the influence of ambient light reflection on colors is effectively compensated, meanwhile, color temperature consistency and color accuracy are ensured through white point correction, the display quality under different ambient lights is remarkably improved, and the visual experience of a user is improved.

The invention provides a sulfur-containing boron-nitrogen compound and application thereof, the sulfur-containing boron-nitrogen compound has a structure as shown in a formula I or a formula II, the boron-nitrogen compound has a narrow spectrum, and is used as a luminescent material for preparing a luminescent layer of an organic electroluminescent device, and the prepared organic electroluminescent device shows high efficiency and high stability, and can be used as a luminescent material for preparing a luminescent layer of the organic electroluminescent device. Meanwhile, the emission spectrum of the device is narrow, the electroluminescence belongs to emission from orange red light to near infrared light, and the highest external quantum efficiency of electroluminescence of the device is as high as 20% or above.

The invention relates to a method for calibrating a light source and a spectrometer. A calibration light source includes: a broadband light source that emits light in a broad spectral range; and a filter receiving the light emitted by the broadband light source and providing structured light by applying an attenuation pattern on the received light exhibiting pattern characteristics at a plurality of spectral reference lines, the calibration light source is configured such that the emission spectrum of the structured light emitted by the calibration light source exhibits unique identifiable emission spectrum characteristics corresponding to the mode characteristics at a plurality of spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is also disclosed.

The invention discloses a metal 3D printing detection method and device based on emission spectrum and ultrasonic fusion. The method comprises the following steps: synchronously exciting and collecting full-wave band spectrum and ultrasonic signals on the surface of a sample through laser, preprocessing the signals, inputting the preprocessed signals into a multi-modal deep learning model integrated with an LANet network for feature extraction and fusion, and realizing multi-dimensional detection by using the fused features; the analysis module is used for analyzing element components and chemical defects; a double-flow time sequence network is constructed, time domain characteristics of the ultrasonic signals are analyzed in parallel to evaluate physical defects, and frequency domain sound velocity information is analyzed to evaluate residual stress; and modeling the attenuation characteristics of the ultrasonic signal by using a deep learning model, and calculating an ultrasonic attenuation coefficient to obtain probability distribution of the grain size. According to the method, the two signals are fused, the detection accuracy is improved by utilizing the strong feature mining and nonlinear mapping capability of deep learning, and multi-dimensional comprehensive evaluation of the metal 3D printing component is realized.

The invention relates to the technical field of material analysis, and particularly discloses an ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry)-based automatic quantitative analysis method for primary and secondary elements in a high-temperature alloy, which comprises the following steps: dissolving a to-be-analyzed high-temperature alloy sample in a mixed acid of sulfuric acid and nitric acid to obtain a to-be-detected sample solution; feeding the sample solution to be detected into an atomizing chamber through a peristaltic pump, and collecting emission spectrum data of each element; establishing a standard curve of the concentration and emission intensity of each element by using a standard solution with known concentration; pre-processing the received emission spectrum data through a control system and a data processing module of the instrument; the data processing module compares the preprocessed emission spectrum data with a standard curve through a multiple linear regression method; and generating a detailed analysis report, and transmitting the generated analysis report to terminal equipment of a user through a printer or a network. Through an optimized sample dissolving method, a data preprocessing technology and a real-time correction algorithm, the accuracy and the stability of an analysis result can be effectively improved.

A first pumping source and a second pumping source are combined through a pumping beam combiner and are coupled into an erbium-doped fluoride fiber and a high-reflectivity fiber bragg grating, and the erbium-doped fluoride fiber and a low-reflectivity fiber bragg grating form a laser resonant cavity. The intermediate infrared laser is output through the low-reflectivity fiber bragg grating, the cladding light filter and the optical fiber end cap; the high-reflectivity fiber bragg grating and the low-reflectivity fiber bragg grating have the same grating period, the fourth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4F9 / 2 energy level to the 4I9 / 2 energy level, and the fifth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4I11 / 2 energy level to the 4I13 / 2 energy level; by adjusting the power of the first pumping source and the second pumping source, the net gain of laser transitions from the 4F9 / 2 energy level to the 4I9 / 2 energy level and transitions from the 4I11 / 2 energy level to the 4I13 / 2 energy level is regulated and controlled, and switching of laser working wavelengths is achieved.

The invention belongs to the technical field of organic synthesis, and particularly relates to a salicylaldehyde hydrazone bridged organic boron photoinitiator as well as a preparation method and application thereof. The structural formula of the salicylaldehyde hydrazone bridged organic boron photoinitiator is as shown in formula I, wherein R is H or halogen atom; the salicylaldehyde hydrazone bridged organic boron photoinitiator has a vertical spatial configuration formed by a seven-membered ring and a six-membered ring. A framework of the salicylaldehyde hydrazone bridged organic boron photoinitiator has a unique vertical spatial configuration, generation of a spinning triplet state can be effectively promoted through orbital angular momentum regulation and control, and a more favorable excited state characteristic is provided for a photoinitiation process. The absorption wavelength and the emission spectrum of an LED light source are well overlapped, and high reaction activity can still be kept under the conditions of low irradiation intensity (lt, 60 mW / cm) and short exposure time (lt, 60 s). In addition, the preparation method of the salicylaldehyde hydrazone bridged organic boron photoinitiator is simple and efficient, the raw material cost is low, and the salicylaldehyde hydrazone bridged organic boron photoinitiator has a wide application prospect.

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 provides a red light and infrared light-emitting compound based on a boron-nitrogen fused ring and application thereof. The invention provides a boron-nitrogen polycyclic aromatic hydrocarbon material of a fused naphthalene ring, and a specific strong electron withdrawing group is introduced to a boron atom para-position. Compared with a compound disclosed in the prior art, the compound provided by the invention introduces a strong electron withdrawing group to a boron atom para-position of boron-nitrogen polycyclic aromatic hydrocarbon of a fused naphthalene ring, so that the emission spectrum of the material can be subjected to significant red shift (red shift from a yellow light band to a red light band and even an infrared band), and red light and even infrared light emission with high luminous efficiency and a narrow band can be realized. An electroluminescent device prepared from the compound provided by the invention shows relatively high luminescent color purity and relatively excellent luminous efficiency, and can meet the requirements of current enterprise production on high-performance luminescent materials.

The invention provides an organic electroluminescent material and an organic electroluminescent device, and belongs to the field of organic electroluminescent materials, and the organic electroluminescent material has a structure as shown in a formula I. The organic electroluminescent material has low refractive index, and can be used as a luminescent auxiliary material and applied to a thicker layer in a double-layer luminescent auxiliary material, so that the organic electroluminescent material can be used as a light-emitting auxiliary material. The light emitted from the device passes through the low-refractive-index film layer of the formula I, the organic electroluminescent device prepared by matching the low-refractive-index film layer with the high-refractive-index light-emitting auxiliary material can play a better light gathering role, the light with the specific wavelength in the light emitted from the device is emitted out, the emission spectrum can be narrowed, the light-emitting intensity of the light with the specific wavelength is enhanced, and the light-emitting efficiency of the organic electroluminescent device is improved. The light loss is reduced, the luminous efficiency of the device is improved, and meanwhile, the lower driving voltage and the longer service life of the device are ensured.

A display device comprises a plurality of pixels, each with a filter element. The display device also includes a laser light source for emitting source light with an adjustable wavelength. The source light can be sequentially directed into the filter elements of the pixels. Each filter element has an emission spectrum that exhibits an intensity maximum at a resonance wavelength that depends on a specific emission angle.

The invention discloses an injection molding method and an injection molding device for a vehicle-mounted electronic structural member, and the method comprises the following steps: applying an excitation light source to obtain a polarization emission spectrum of engineering plastic, and forming a quantum optical fingerprint spectrum; carrying out polarization analysis on the spectral characteristic peak, and calculating a dichroic ratio to obtain molecular orientation three-dimensional distribution data; applying a laser pulse to acquire a coherent Raman scattering signal and a harmonic generation signal to obtain nonlinear optical response data; analyzing a molecular chain rearrangement characteristic and a stress relaxation characteristic based on the data to obtain kinetic parameters; and analyzing a molecular orientation evolution rule according to the kinetic parameters to obtain structure evolution prediction data. According to the technical scheme, the molecular orientation state of the engineering plastic can be monitored in real time in the injection molding process, and accurate characterization and prediction of the dynamic arrangement behavior of molecular chain segments are achieved through a method combining quantum spectrum analysis and nonlinear optical response characterization. And a scientific basis is provided for optimizing injection molding process parameters and controlling residual stress distribution in a product.

The present invention provides a spectrum-based light-emitting fixture and a spectrum-based light emission method. The spectrum-based light-emitting fixture has light sources with multiple emission peak wavelengths, the spectrum-based light emission method is based on waveband integral calculus, where absorption peaks in a given spectrum that meet energy variation requirements are identified, and their wavelengths are used to divide primary wavebands. Each primary waveband is further subdivided into multiple secondary wavebands, and the spectral energy of each secondary waveband is calculated through integration. The selected light sources have emission peak wavelengths that are close to and match the mid-wavelengths of the secondary wavebands. By matching the light sources with the spectral energy of the corresponding secondary wavebands, the adjustment of spectrum-based light emission is achieved, thus, the emission spectrum of the spectrum-based light-emitting fixture can highly restore the given spectrum with high accuracy.

The present disclosure relates to the technical field of biological microscopic imaging. Disclosed are a deconvolution-based super-resolution imaging method and apparatus by means of deep learning-based denoising, and a medium. The method comprises: acquiring an image to be denoised having a structure to be imaged thereof marked by a fluorescent molecule; using a preset image denoising neural network to denoise the image to be denoised to obtain a denoised image, wherein a training data set for training the network is generated by using the photoswitching characteristic of a photoswitchable fluorescent molecule, the photoswitchable fluorescent molecule is used for marking the structure to be imaged of each sample in the training data set, and an emission spectrum of the fluorescent molecule overlaps an emission spectrum of the photoswitchable fluorescent molecule; and performing deconvolution processing on the denoised image to obtain a super-resolution image. According to the present disclosure, a large-scale and high-quality ground truth image is obtained by using the photoswitching characteristic of the photoswitchable fluorescent molecule, thereby enhancing the denoising effect of the image denoising neural network; the image is denoised by using the network, and then deconvolution is performed on the denoised image, thereby achieving single-frame super-resolution imaging for live cells over a large field of view.

Systems, including methods and compositions, for performing multiplexed assays. The methods may include (A) providing a mixture including (i) a sample having one or more of a plurality of distinct nucleic acid targets, (ii) amplification reagents sufficient for amplification of the targets, and (iii) a tethered probe specific to each target, (B) amplifying the plurality of targets in the mixture, (C) measuring fluorescence from the tethered probe for each target; and (D) determining from the measured fluorescence a quantity representative of a level of each of the targets in the sample. Each tethered probe may include respective first and second fluorophores, with distinguishable excitation and / or emission spectra, and a respective quencher. The probes are configured such that an intensity of fluorescence from one or both fluorophores is altered during amplification of the respective target, so that changes in fluorescence can be used to assess the degree of amplification of the respective target.

The invention relates to an ultraviolet / purple light excited blue fluorescent material as well as a preparation method and application thereof. The Eu < 2 + > doped oxide-based blue fluorescent material has a chemical expression of BaHfSi2O7: xEu < 2 + >, and x is more than or equal to 0.003 and less than or equal to 0.02. Compared with the prior art, the purple-light-excited blue fluorescent material provided by the invention is brand-new and unreported ultraviolet-excited Eu < 2 + >-doped oxide-based 472nm blue-light-emitting fluorescent powder, the fluorescent powder has a wide excitation band, the excitation spectrum range covers 200-450nm, the emission spectrum range covers 390-680nm, and the fluorescent material has a good fluorescent effect under the excitation of 304nm near ultraviolet light. The blue light with the central wavelength of 472nm is emitted, and meanwhile, the blue light emitting material has excellent stability and luminous efficiency. The fluorescent powder can be prepared by adopting a conventional solid-phase reaction method, has the characteristics of simple preparation process and facilitation of industrial production, can be combined with a near ultraviolet chip to generate white light, can be used as a good candidate material for wide application of a white light LED, and can meet the urgent demand of a current healthy illumination LED light source.

The invention aims to provide a photodynamic therapy power control method and system, and relates to the technical field of photodynamic therapy. The method comprises the following steps: setting an initial value of output power of an excitation light source, and starting the excitation light source to perform photodynamic therapy operation on a therapy area; collecting the total fluorescence emission spectrum of the treatment area in real time, and obtaining the fluorescence intensity of the photosensitizer and the fluorescence intensity of the photoproduct according to the total fluorescence emission spectrum; and adjusting the output power of the excitation light source according to the photosensitizer fluorescence intensity and the light product fluorescence intensity. The background fluorescence emission spectrum is calculated through the output power of the excitation light source, so that the fluorescence intensity of the photosensitizer and the fluorescence intensity of the photoproduct are accurately separated, and the progress and the effect of photodynamic therapy are accurately evaluated; by dynamically adjusting the output power of the excitation light source, the output power of the light source can be matched with the real-time response state of the treatment area, and the accuracy and robustness of power control are improved.

A surface-treated steel sheet including: a steel sheet; and a nickel-cobalt-iron diffusion layer formed on the steel sheet as an outermost layer. When the intensities for Ni, Co and Fe are consecutively measured from a surface of the nickel-cobalt-iron diffusion layer in the depth direction by radio frequency glow discharge optical emission spectrometry, and the concentration of Ni, Co and Fe at each of depth positions are determined based on the intensities for Ni, Co, and Fe, a Co concentration gradient ΔPCo ranging from a depth position DCo_MAX to a depth position DCo_15% is 33% by mass / 0.1 μm or less. A depth position at which the concentration of Co is maximum is defined as DCo_MAX and a depth position located closer to the steel sheet than the depth position DCo_MAX and at which the concentration of Co is 15% of the maximum value is defined as DCo_15%.

Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorp-tion spectrum of the phosphorescent compound.

Provided is a light-emitting device and an electronic apparatus including the same. The light-emitting device includes: a first electrode; a second electrode facing the first electrode; an interlayer between the first electrode and the second electrode and including an emission layer; and a capping layer, wherein the emission layer includes a first emitter, the first emitter emits a first light having a first emission spectrum, the capping layer is in a path along which the first light travels, an emission peak wavelength of the first light is about 520 nm to about 550 nm, the first emitter includes platinum, the capping layer includes an amine-containing compound, and a value of a ratio of CIEy to reflective index (RCR value) of the first light extracted to the outside through the capping layer is 38 or less, and the RCR value is calculated according to Equation 1.CIEy / R(cap)×100  Equation 1

A calibration light source includes: a broadband light source that emits light in a broad spectral range; and a filter that receives light emitted by the broadband light source and provides structured light by imparting an attenuation pattern to the received light that has pattern features at a plurality of spectral reference lines, such that an emission spectrum of the structured light emitted by the calibration light source has identifiable emission spectrum features that correspond to the pattern features at the plurality of spectral reference lines. Furthermore, a method for calibrating at least one spectrometer using the calibration light source is disclosed.

A carbon dioxide (CO2) hydrogenation catalyst and a method of its preparation. The CO2 hydrogenation catalyst includes an alkali-metal enriched bauxite residue including calcium carbonate (CaCO3), iron(III) oxide (Fe2O3), iron(III) oxyhydroxide (FeO(OH)), aluminum hydroxide (Al(OH)3), sodalite, muscovite, and Na5Al2CSi3O15. The CO2 hydrogenation catalyst further includes 1 weight percent (wt. %) to 10 wt. % potassium based on a total weight of the CO2 hydrogenation catalyst by inductively coupled plasma optical emission spectroscopy (ICP-OES). The CO2 hydrogenation catalyst is used in a method of hydrogenating carbon dioxide to produce olefins.

This invention discloses a method for detecting polycyclic aromatic hydrocarbons (PAHs) based on ultraviolet fluorescence and absorption spectroscopy, comprising: Step 1, acquiring the ultraviolet absorption spectrum and the fluorescence emission spectrum of a water sample under ultraviolet light excitation; Step 2, analyzing the corresponding CDOM fluorescence spectrum using the ultraviolet absorption spectrum obtained in Step 1; Step 3, subtracting the CDOM fluorescence spectrum obtained in Step 2 from the fluorescence emission spectrum obtained in Step 1 to obtain a mixed fluorescence spectrum containing multiple PAHs; Step 4, performing multivariate fitting on the mixed fluorescence spectrum obtained in Step 3 to obtain the type and concentration of each PAH in the water sample. This invention also provides a PAH detection device. The method provided by this invention is simple to operate and can directly detect raw water samples, thereby obtaining more accurate PAH detection results.

To highly accurately control the degree of roughening during a matting process.SOLUTION: A modification method for a curable resin comprises a precuring step of applying first light having a principal wavelength of at least 200 nm on a light emission spectrum of a light source toward a surface of the curable resin under an atmosphere having an oxygen concentration of 0.3 vol% or more and 21.0 vol% or less. A precuring device that executes the modification method comprises a first light source that emits first light having a principal wavelength of at least 200 nm on a light emission spectrum, and applies the first light toward the surface of the curable resin.SELECTED DRAWING: Figure 2

The present disclosure discloses a device for detecting substances in a liquid to be tested using plasma spectroscopy, including an electrode, at least a portion of which is configured to be disposed in the liquid to be tested and is suitable to contact the liquid to be tested, the electrode being suitable to generate a plasma in the liquid to be tested by applying an external voltage, wherein the plasma is located in a bubble generated by the external voltage; a light detector, configured to detect the emission spectrum generated by the plasma in the bubble, wherein the light detector is an optical fiber, and there is no focusing element between the light detector and the plasma.

The invention relates to an atmospheric pressure glow discharge atomic emission spectrum analysis device and a detection method. The device comprises an ultrasonic atomization-membrane desolvation sampling system, a high-voltage power supply, an excitation source and a spectrum detection system. The high-voltage system outputs pulse voltage and a synchronous TTL level signal; and the TTL level signal is connected to a detection system. The excitation source is atmospheric pressure glow discharge micro-plasma, and the stable glow discharge micro-plasma can be maintained under atmospheric pressure. The monopulse modulation analysis device provided by the invention effectively solves the problem of insufficient heavy metal excitation efficiency caused by the fact that the discharge current is limited to 20-35mA in the existing atmospheric pressure glow discharge technology. The ultrasonic atomization-membrane desolventizing sampling device can directly sample a liquid sample which is not suitable for volatilization, complex pretreatment is not needed, and the desolventizing membrane is used for removing water from aerosol, so that sensitive and rapid atomic analysis is realized. The device is suitable for efficient detection of trace metal elements, and has the advantages of being simple in structure, low in cost, suitable for real-time online analysis and the like.