37 results about "Spectroscopy methods" patented technology

Method (100) of optical spectroscopy for analyzing a sample using an optical spectrometer (10), comprising: Obtaining a sample spectrum (101) of the sample using the optical spectrometer; Obtaining a blank spectrum (102) using the optical spectrometer, wherein the blank spectrum includes structured background radiation that correlates with the sample spectrum; Determining a cross-correlation (103) of the sample spectrum and the blank spectrum; Generating a mapped blind spectrum (105) by mapping the blind spectrum onto the sample spectrum based on cross-correlation; and Subtracting the imaged blank spectrum from the sample spectrum to produce a background-corrected sample spectrum (106).

A spectroscopic method of estimating the cadmium concentration in an aqueous sample including: preparing at least 5 aqueous calibration samples, each calibration sample including water, a pH regulator in an amount such that each calibration sample has a pH of from 8 to 10, an equal concentration of dimethylglyoxime and dissolved cadmium in an amount of from 0 to 12 μg / mL; and, measuring over optical path length (l) the absorbance for each calibration sample of radiation (R) having a wavelength of from 520 to 540 nm, thereby generating calibration data. The method further includes: forming a treated aqueous sample; measuring over the optical path length (l) the absorbance for the treated aqueous sample of radiation (R) having a wavelength of from 520 to 540 nm; generating test data; and, estimating the concentration of cadmium in the aqueous sample from the test data and the calibration data.

A method for determining a set of physical parameters of a sample, comprising the following steps: - A acquisition of a measured sample time trace Es(t), - B acquisition of a measured reference time trace Eref(t), - C determination of a broadened reference time trace, called Eref0(t), and determination of the discrete Fourier transform of the broadened reference time trace - D determination of a modeling of the impulse response of the sample in the frequency domain, called sample frequency model, from the Fourier transform of the broadened reference time trace and a physical behavior model of the sample, according to a set of physical parameters (pi), - E application of an optimization algorithm to the set of physical parameters (pi), comprising the following sub-steps: - El initialization of the physical parameters (pi), - iteratively implementing the following sub-steps: - E2 computation of the inverse discrete Fourier transform of the sample frequency model, called estimated sample time trace E est {p i}(t), - E3 computation of an error function (ε er {pi}) until obtaining a set of values of the physical parameters (pi opt ) that minimize the error function.

A spectroscopy method comprising detecting spectral light arising from excitation of a sample (124) with excitation light with a single photon detector element (133), detecting spectral light arising from excitation of the sample (124) with the 5 excitation light with an array (131) of multi-photon detector elements (134) and correlating the output from the single photon detector element (124) with the output from the two-dimensional array (131) of multi-photon detector elements (134). 10 Fig. 2a

The application discloses a kind of mid-infrared discrete time stretching spectrum method, its characteristics are as follows:1) prepare the double-color pulse light source with slightly different repetition frequency;2) the pulse of pulse light source 1 is output wavelength broadening and time stretching for the signal light of nonlinear difference frequency, and the pulse of pulse light source 2 is output power amplification, for the pump light of nonlinear difference frequency;3) the time-domain broadening spectrum optical sampling of signal light by pump light pulse, obtain the pulse sequence of mid-infrared discrete time stretching;4) mid-infrared discrete chirp pulse is measured through low bandwidth mid-infrared detector after passing through the sample to be measured, and absorption spectrum information is obtained.The application has the advantages of wide band, high speed and high resolution compared with prior art, and the measurement of mid-infrared spectrum is completed by means of low bandwidth single-point detector, without dispersion spectrometer element and mechanical scanning device, which solves the problem of lack of time and high dispersion time-domain stretching medium in mid-infrared band, and expands the application of time stretching technology in mid-infrared band.

The application provides a fast random addressing scanning fluorescence correlation spectroscopy method and device thereof, comprising the following steps: S1, using a surface array camera to collect a series of wide field images under light sheet illumination, and obtaining a global low time resolution image fluorescence correlation spectroscopy diffusion image by calculation; S2, selecting an interested region according to the wide field fluorescence correlation spectroscopy image and setting a scanning array generation condition; S3, automatically generating a scanning array according to the selected arbitrary interested region and the set condition.The fast random addressing scanning fluorescence correlation spectroscopy method and device thereof provided by the application can solve the problem that the traditional scanning FCS cannot detect fast kinetics due to slow scanning speed, and can also solve the problem that the traditional scanning FCS cannot simultaneously monitor multiple regions due to the mechanical scanning of the scanning galvanometer.

An ATR apparatus includes a prism having a reflection surface, a holding unit holding a sample including a suspension on the reflection surface, and an adjustment unit adjusting a fluidal state of the sample held on the reflection surface. The adjustment unit adjusts the fluidal state of the sample to a first fluidal state in order to acquire a first detection result relating to the sample in the first fluidal state and adjusts the fluidal state of the sample to a second fluidal state in order to acquire a second detection result relating to the sample in the second fluidal state.

The present disclosure provides an integrating-sphere-assisted resonance synchronous (ISARS) spectroscopy method performed with an ISARS spectrophotometer, for example, a spectrofluorometer equipped with an integrating-sphere accessory. The methods and systems of the present disclosure utilize the ISARS spectrophotometer equipped with an integrating sphere to determine the ISARS spectral intensity, quantify the ISARS-based absorbance, and subsequently evaluate the sample's double-beam UV-vis absorbance spectrum (also known as the absorption extinction spectrum). This ISARS method enables quantitative separation of light absorption and scattering contribution to the sample UV-vis extinction spectrum measured with double-beam UV-vis spectrophotometer.

To achieve Ramsey spectroscopy while effectively suppressing the Doppler effect.SOLUTION: A Ramsey spectroscopic device 1 includes: an optical path 10; an optical path length stabilizing circuit 30 that stabilizes the length of the optical path 10; a modulator 20 that is optically connected to the optical path 10, generates, in a pulse shape multiple times, a resonant laser beam at a first frequency f1 that causes resonance of atoms, molecules, or ions, which are a spectroscopic target, and generates a non-resonant laser beam at a second frequency f2 that does not cause resonance; and a spectroscopic unit 200 that spectroscopically disperses the spectroscopic target. The spectroscopic unit detects a state change of the spectroscopic target according to the frequency f1 by irradiating the spectroscopic target with the resonant laser beam.SELECTED DRAWING: Figure 1

A photoelectron spectroscopy method includes: performing photoelectron spectrum detection on a target sample to obtain an initial photoelectron spectrum; selecting spectrum data points according to the initial photoelectron spectrum to obtain a photoelectron spectrum data point sequence; performing a first model parameter update on a preset initial photoelectron spectrum fitting model according to a preset expectation-maximization algorithm and the photoelectron spectrum data point sequence to obtain a first photoelectron spectrum fitting model; acquiring a target quantum effect constraint for the target sample; performing a second model parameter update on the first photoelectron spectrum fitting model according to a preset central field approximation relation and the target quantum effect constraint to obtain a second photoelectron spectrum fitting model; and performing spectrum fitting on the photoelectron spectrum data point sequence according to the second photoelectron spectrum fitting model to obtain a target photoelectron spectrum.

The invention relates to the field of water quality online monitoring and spectral measurement. According to the excitation-fluorescence detection spectrum device and the online spectrum detection method, under the condition of monochromatic excitation, a fluorescence original spectrum, a transmission original spectrum and a reference light intensity spectrum are synchronously collected in a sampling window, and dark spectrum deduction and reference normalization are carried out in combination with a dark spectrum baseline library to obtain a normalized fluorescence spectrum and a normalized absorption spectrum; generating a correction parameter record based on the spectrum sampling configuration parameter set, and performing correction processing on the two types of spectrums; and calculating a consistency index according to the spectrum section interval set, comparing the consistency index with a threshold value to generate a reacquisition plan, executing compensation sampling and spectrum section replacement to form a correction spectrum record, generating a correction spectrum abstract value and a storage index record, and updating the configuration library based on the quality identifier. According to the technical scheme of the invention, the synchronism and the anti-drifting capability are improved, the scattering / light intensity fluctuation influence is reduced, and adaptive compensation and traceable evidence storage are realized.

The following description generally relates to techniques, devices, apparatuses, and methods used for screening and characterizing a plurality of samples within an experimental run by X-ray diffraction (XRD) experiments in which it may be useful to investigate a relatively large number of samples, several samples in situ, sequentially and / or simultaneously. The present disclosure concerns a multiwell device allowing, for example and without being limitative, high-throughput screening and in-situ characterization of materials which can be investigated using XRD-based techniques. The screening achievable using the technology that will be herein described does not require the time-consuming step of removing the material or the sample during an experiment, and is also compatible with various analytical techniques, which include but are not limited to the XRD-based techniques mentioned above. Another example of such analytical techniques includes spectroscopic methods (e.g., infrared spectroscopy or fluorescence- based screening techniques).

Methods and systems for predicting signal quality. An analytical instrument support system receives preliminary sample data collected from a short scan of a sample. The analytical instrument support system determines a maximum brightness intensity level from the preliminary sample data. The analytical instrument support system determines a performance level based at least on the maximum brightness intensity level. The analytical instrument support system determines an intensity-time model including a plurality of intensity levels and a plurality of exposure times, based at least on deviations of one or more intensity linear models, the one or more deviations associated with the determined performance level. The analytical instrument support device determines a first maximum intensity level based at least on a first corresponding exposure time and the intensity-time model, or determines a first parametric exposure time based at least on a first corresponding intensity level and the intensity-time model.

Absorbance spectroscopy methods and systems are disclosed including a spectroscopy analyzer, comprising: an optical element device positioned to receive an analysis light that passes through a sample of a fluid specimen from an illumination unit, the analysis light including first light in a first light range and second light in a second light range different than the first light range, the optical element device comprising: a housing assembly that defines an internal space; and a dichroic mirror-reflector within the internal space positioned to receive the analysis light, the dichroic mirror-reflector configured to filter the analysis light such that a first portion of the analysis light in the first light range is reflected off the dichroic mirror-reflector as a spectrometer light, and such that a second portion of the analysis light in the second light range passes through the dichroic mirror-reflector as a detector light.

In a method for the spectral analysis of a liquid mixture of substances consisting of known individual substances, a reference spectrum for the mixture is provided. This reference spectrum represents a target state of the mixture in which each individual substance is present at a target concentration. An actual spectrum of the liquid mixture to be analyzed is then generated. Finally, the concentrations of the individual substances in the mixture are determined based on an approximate spectral composition of the actual spectrum, derived from known pure spectra of the known individual substances and at least one compensation spectrum.

In a spectroscopy device (20) and a spectroscopy method, a coherent radiation source (21) is provided for illuminating a sample (11). A detection device (22) is configured to detect radiation (24) reflected from the sample (11) to the spectroscopy device (20) over a measurement interval. A verification device (30) is configured to check whether the relative movement between the spectroscopy device (20) and the sample (11) is sufficient to adequately average speckle patterns. The verification device (30) comprises at least one sensor (32) and a processing device (31).

A spectroscopic device 5 is for receiving light L1 that has undergone wavelength-decomposition in a predetermined direction by a spectroscopic optical system 4 including a spectroscopic element, and outputting spectroscopic spectral data of the light L1. The spectroscopic device 5 comprises: a CMOS image sensor that has a pixel unit 11 which has a plurality of pixels 21 for receiving the wavelength-decomposed light L1 and converting the same into an electrical signal, and in which the plurality of pixels 21 are arranged in a row direction along a wavelength decomposition direction and in a column direction perpendicular to the row direction; an identification unit 14 that identifies, as specific pixels 21K among the plurality of pixels 21, pixels 21 on which a spectroscopic spectral image 31 of the light L1 is formed; and a generation unit 15 that adds up the pixel values of the specific pixels 21K belonging to the same column, and that generates spectroscopic spectral data based on the result of the adding.

The present application relates to a kind of quantitative determination mixed system microplastic and the spectroscopy method of organic matter content, comprising: the establishment of initial NOM and PSMPs system or the establishment of NOM-F and PSMPs system after goethite adsorption, the initial NOM and PSMPs system includes HA or FA and PSMPs binary system and HA, FA and PSMPs ternary system;The NOM-F and PSMPs system after goethite adsorption includes HA-F or FA-F and PSMPs binary system and HA-F, FA-F and PSMPs ternary system.This method is according to the difference of different types of organic matter and microplastic ultraviolet-visible light absorption spectrum, using spectroscopy distinguishes and then quantifies respective content, this method is easy to operate, test cost is low, especially for the small particle size microplastic and organic matter system that is difficult to separate by centrifugation or filtration etc.It has good quantitative measurement effect.

Methods and apparatus for spectroscopy from nanoscale to millimeter scale and imaging techniques, including atomic force microscopy, infrared spectroscopy, confocal microscopy, Raman spectroscopy, and mass spectroscopy. For infrared spectroscopy, the sample is illuminated with infrared light and the resulting sample deformation is read out with a focused UV / visible beam and / or AFM tip. The combination of the two techniques provides fast and large area measurement scans using the UV / visible light and high resolution measurements using the AFM tip. The methods and apparatus also include the ability to analyze the light reflected / scattered from the sample by a Raman spectrometer for supplemental analysis by Raman spectroscopy.

Methods and systems for determining one or more ion components. The method may include disposing a fluid sampling tool into a wellbore wherein the fluid sampling tool includes at least one probe to fluidly connect the fluid sampling tool to a formation in the wellbore, and at least one passageway that passes through the at least one probe and into the fluid sampling tool. The method may further comprise drawing a formation fluid, as a fluid sample, through the at least one probe and through the at least one passageway, and analyzing the fluid sample in the fluid sampling tool for one or more ion components.

Systems and methods of managing a chemical recycling process include accessing characterization data for a feedstock, the characterization data including one or more spectra collected according to one or more spectroscopic methods. The method includes predicting a set of constituent materials included in the feedstock using the characterization data. The method includes predicting a material composition of the feedstock using the predicted set of constituent materials. The method includes identifying one or more target products using, at least in part, the predicted material composition of the feedstock. The method includes generating a set of chemical reaction schemes capable of converting at least a portion of the feedstock into the one or more target products. The method further includes storing the material composition of the feedstock, the one or more target products, and the identification of the set of chemical reaction schemes in a data store.

A spectroscopic device 1 comprises: a first atomic movement path 11 that is provided with an atom supply unit 10; a second atomic movement path 12 that, at a finite angle, intersects the first atomic movement path 11 at a first intersection position P1; a third atomic movement path 13 that, at a finite angle, intersects the second atomic movement path 12 at a second intersection position P2; and a clock laser light source 20 that supplies a clock laser L20 which propagates in a direction opposite to or the same as that of the movement of atoms on the second atomic movement path 12. A spectroscopic region SP where the clock laser L20 causes excitation of clock transition in atoms is formed between the first intersection position P1 and the second intersection position P2 on the second atomic movement path 12.

This ATR device is equipped with: a prism having a reflecting surface; a holding part that holds a sample containing a suspension on the reflecting surface; and an adjusting part that adjusts the flow state of the sample held on the reflecting surface. The adjusting part adjusts the flow state of the sample to a first flow state in order to acquire a first detection result relating to the sample in the first flow state, and adjusts the flow state of the sample to a second flow state in order to acquire a second detection result relating to the sample in the second flow state.

A computer-implemented method for synthesizing spectral data includes the following steps: acquiring a set of spectral data each associating a spectrum with a sample having a given chemical composition, using a spectroscopy method, determining a theoretical model of the distribution of the intensities of the spectrum for each wavelength channel of the spectrum, generating a set of synthetic spectral data by generating, for each wavelength channel of the spectrum, a randomly drawn intensity according to the probability distribution of the theoretical model.

The present application relates to the technical field of optical gas sensing, and particularly relates to a kind of cavity enhanced absorption spectroscopy methods of calibration-free cavity reflectivity, comprising the following steps: S1: the phase information of reflected light is extracted by detection system and error signal is obtained, and the optical cavity reflectivity at the target absorption line of the gas to be measured is obtained by error signal;Detection system includes laser, electro-optic modulator, three-terminal circulator, collimator, mode matching lens group, optical cavity, photodetector one, function generator, frequency mixer, acquisition card and computer;S2: the gas to be measured is introduced into the optical cavity, and the cavity enhanced absorption spectrum of the gas to be measured is obtained;S3: the concentration of the gas to be measured is obtained by inversion using the determined optical cavity reflectivity and cavity enhanced absorption spectrum.The present application does not need additional standard gas, avoids the error introduced by the uncertainty of standard gas concentration, and also makes up for the deficiency that traditional optical cavity ring-down technique is difficult to measure reflectivity when reflectivity is relatively low.

Provided is an analysis device, an analysis method, and a program with which analysis processing according to a user's request input in a natural language can be executed on measurement data of a substance measured by a predetermined spectroscopy method.　An analysis device 1 comprises: a measurement data acquisition unit 31 that acquires measurement data including the spectrum of a substance to be analyzed measured by a predetermined spectroscopy method; a user request reception unit 32 that receives, in a natural language, a user's request related to analysis of the measurement data; a module selection unit 33 that performs selection processing for selecting a processing module corresponding to the user's request from among a plurality of types of processing modules that perform processing on the measurement data with respect to a natural language model 5 which has been trained for interpreting the natural language; a processing execution unit 34 that causes the processing module selected by the selection processing to execute processing; and a presentation processing unit 35 that presents an analysis result based on the processing of the processing module to the user.

A spectroscopy method to be carried out with a detector (130) comprising a plurality of pixels (P1, P2, P3, P4, P5… Pn), each pixel (P1, P2, P3, P4, P5… Pn) comprising at least two single photon detector elements (133), wherein the detector (130) records 5 a distribution of single photon detections by each pixel (P1, P2, P3, P4, P5… Pn) with time from a most-recent pulse of an excitation beam on a sample (124). The method comprises:- receiving spectral light produced by exciting the sample (124) with pulses of the excitation beam; and dispersing the spectral light onto a spectrum. During a first time period, directing a first portion (150) of the spectrum onto a first 10 pixel (P1) of the plurality of pixels (P1, P2, P3, P4, P5… Pn) and a second portion (151) of the spectrum onto a second pixel (P2) of the plurality of pixels (P1, P2, P3, P4, P5… Pn), and reading out from the detector (130) a first distribution of single photon detections made by the first pixel (P1) and a second distribution of single photon detections made by the second pixel (P2). During a second time period, 15 directing the first portion (150) of the spectrum onto the second pixel (P2) and the second portion of the spectrum onto a third pixel (P3) of the plurality of pixels (P1, P2, P3, P4, P5… Pn), and reading out from the detector (130) a third distribution of single photon detections made by the second pixel (P2) and a fourth distribution of single photon detections made by the third pixel (P3). Spectral data is generated by 20 associating the first and third distributions with the first portion (150) of the spectrum and the second and fourth distributions with the second portion (151) of the spectrum.

This ATR device is equipped with: a prism having a reflecting surface; a holding part that holds a sample containing a suspension on the reflecting surface; and an adjusting part that adjusts the flow

This invention introduces a non-invasive method and device for detecting and quantifying antioxidant carotenoids in human tissues, such as skin, gum, and retina, using CIE Lab* color space analysis. The method employs absorption spectrophotometry and RGB image processing, providing a multifaceted approach to health monitoring. It detects specific antioxidants like lycopene, beta-carotene, lutein, and zeaxanthin. The system uses three methods: (1) pure absorption spectroscopy for precise antioxidant measurement; (2) an RGB camera technique with advanced image processing for diffuse spectra analysis; and (3) a hybrid model combining multiple spectroscopic technologies. A mobile application facilitates real-time health monitoring. Validated against Raman spectroscopy, the system ensures rapid, accurate, and reliable measurements without invasive sampling. Applications range from routine check-ups to targeted nutritional assessments, making it valuable for healthcare providers, researchers, and individuals.

The embodiment of the application provides a photoelectron energy spectrum analysis method and device, electronic equipment and storage medium, and belongs to the technical field of surface material detection. The method comprises the following steps: performing photoelectron energy spectrum detection on a target sample to obtain an initial photoelectron energy spectrum; performing energy spectrum data point selection according to the initial photoelectron energy spectrum to obtain a photoelectron energy spectrum data point sequence; updating a preset initial photoelectron energy spectrum model according to an expectation maximization algorithm and the photoelectron energy spectrum data point sequence to obtain a first photoelectron energy spectrum fitting model composed of all photoelectron peaks; obtaining a target quantum effect constraint of the target sample; updating all first photoelectron peaks according to a quantum effect constraint under a central field approximation to obtain a second photoelectron energy spectrum fitting model; and performing satellite peak correction fitting according to a satellite peak energy ratio of the photoelectron peaks in the second photoelectron energy spectrum to obtain a complete target photoelectron energy spectrum. The embodiment of the application can improve the accuracy of photoelectron energy spectrum analysis.