99 results about "Absorbance" patented technology

The invention relates to the field of soil spectrum analysis, in particular to a farmland soil environment detection method and system. The method comprises the following steps: firstly, analyzing fluctuation characteristics of near infrared spectrum curves of a plurality of soil samples in a preset window of a target wavelength to obtain undisturbed degrees of the near infrared spectrum curves in the target wavelength; fitting spectral data points of the near infrared spectral curve, and obtaining feature retention degrees of the extreme points on the fitted curve according to the difference of fitting absorbance of adjacent extreme points on the fitted curve, the absorbance of each wavelength and the difference of the fitting absorbance and the wavelength distribution of the extreme points on each fitted curve; filtering the spectral data points of the target curve based on the non-interference degree and the feature retention degree to obtain a filtering curve; according to the method, the interference information in the near infrared spectrum curve is removed, the existing key information is reserved as much as possible, and the precision of farmland soil environment detection is improved.

Passive cooling article (120) includes a plurality of first elements (122) defining a high absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range and a plurality of second elements (124) defining a low absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range, wherein the plurality of first (122) and second (124) elements are interspersed to form a major structure having a first major surface (130) comprising the first element outer surfaces (126) and the second element outer surfaces (128), wherein the first element outer surfaces (126) face a first direction toward a first end region (136) of the major structure (130) and the second element outer surfaces (128) face a second direction toward a second end region (136) of the major structure. The article (120) may be applied to a substrate (104), for example, on a generally vertical surface of a vehicle or stationary structure.

The invention relates to the technical field of spectral data processing, in particular to a food component detection method and system based on spectral analysis. The method comprises the following steps: constructing a simulated Gaussian mixture model of all suspected absorption peak wavelengths, obtaining an optimal estimation parameter of the simulated Gaussian mixture model, and screening out a Gaussian center wavelength; according to the relative distance between each wavelength and the Gaussian center wavelength, obtaining the single spectrum absorption peak characteristic of each wavelength of each sample; combining the correlation coefficient of the absorbance in the neighborhood range of each wavelength between each sample and other samples to obtain the overall spectral absorption peak characteristic of each wavelength; forming a one-dimensional column vector of an absorbance matrix by the absorbance of all the samples under each wavelength; and carrying out dimension reduction processing on the absorbance matrix to obtain dimension reduction data of the absorbance matrix. According to the method, the accurate absorption peak performance characteristic of each wavelength is obtained, important characteristics are reserved during dimension reduction, and the accuracy of a dimension reduction result is improved.

A microfluidic test system is disclosed. The system includes a test substrate including parallel channels and reaction chambers. The reaction chambers are adapted to accommodate optical transmittance, absorbance and reflectance testing. The movement of the fluid within the system is controlled and synchronized in real time with the optical measurements of the reagents and analytes within each individual reaction chamber. The optical testing of each reaction chamber is customized regarding the color and intensity of the source light. The system includes an easy-to-use applicator for the capture of the test fluid and a fully automated measurement and test system. The microfluidic test system may be incorporated into clothing or apparel such as in a diaper. A device and method are also disclosed.

A system may include a light source, to generate a probe signal, comprising incident radiation; an optical probe, to direct the incident radiation through a fluid sample; a motor, to move the optical probe along a probe axis, to change a path length of the incident radiation through the fluid sample; and a detector, to receive the incident radiation as attenuated radiation after passing through the fluid sample. The system may include a control system, arranged to: initiate an absorbance measurement by directing movement of the optical probe along the probe axis; direct the light source to emit the incident radiation; and automatically adjust at least one measurement parameter of a set of measurement parameters for the sample measurement, based upon a slope parameter m, wherein m is derived from a rate of change in an intensity of the attenuated radiation with a change in the path length.

Disclosed are a device and a method for gas concentration measurement comprising a gas detection chamber, a temperature sensing element, a pressure sensing element, a light source supply device and a light sensing device for measuring a gas concentration of a to-be-measured gas (such as ozone). The temperature sensing element and the pressure sensing element respectively measure a temperature and a pressure of the to-be-measured gas. The light source supply device uses UV-LED as an ultraviolet light-emitting source, and provides a first detection light beam and a calibration light beam with different ozone absorbances, and then uses a light beam splitter to split the light beams into a split light that passes through the to-be-measured gas and a split light that does not pass through the to-be-measured gas.

An infrared-spectroscopy-based method for monitoring temperature-induced deformation of a component of an intelligent moxibustion robot. The method comprises: collecting an infrared spectrum and a frequency spectrum of each detection position on a target component of a moxibustion robot; on the basis of frequency differences between peaks and troughs in the frequency spectrum, constructing a motion influence confidence factor of each detection position; using a box-counting method to acquire a scale relationship graph of the infrared spectrum of each detection position; on the basis of scale relationship graphs of all the detection positions, determining an overall absorbance difference index of the target component; on the basis of the overall absorbance difference index and the motion influence confidence factor, using a local outlier factor (LOF) outlier detection algorithm to calculate an LOF of each detection position in a thermal data sequence; and on the basis of a thermal alarm threshold value, determining a temperature-induced deformation risk of the target component. The method can eliminate spectral difference variations caused by shadows and reflectance properties, thereby improving the precision of determining high-temperature deformation of components.

A method for detecting a component including a concealed pattern includes: detecting infrared electromagnetic radiation reflected or emitted by a component including a first pattern, the component including: a substrate; the first pattern disposed over at least a portion of the substrate; an optional primer layer disposed between at least a portion of the substrate and at least a portion of the first pattern; and a first visibly opaque layer including an infrared transparent pigment, the first visibly opaque layer disposed over at least a portion of the first pattern; and comparing the reflectivity and / or absorbance of infrared electromagnetic radiation by the first pattern at one wavelength to the reflectivity and / or absorbance by the primer layer and / or the substrate at the same wavelength.

The invention relates to the technical field of trace detection, in particular to a rapid nondestructive detection method for phellinus igniarius polysaccharide content based on a near infrared spectrum technology. The method comprises the following steps: acquiring an original spectrum set of phellinus igniarius samples from various sources under a near infrared spectrum, and dividing the samples from the same source into the same group of original spectrum curves; evaluating the stability and distinguishing capability of light absorption change in different wavelength intervals, and obtaining the light absorption credibility of each target wavelength of the original spectrum curve; analyzing the morphological difference of a single curve in each group of spectrum curves relative to the whole group of curves, and obtaining an initial judgment coefficient for curve smoothing processing; and combining the light absorption credibility with the initial judgment coefficient, performing corresponding smoothing processing on each original spectrum curve according to the determined window length and processing order, and analyzing the actual polysaccharide content of the phellinus igniarius sample of the corresponding type. According to the technical scheme, the accuracy of polysaccharide content detection of phellinus igniarius through near infrared spectroscopy is improved.

The invention relates to the technical field of rubber block sorting, and discloses a rubber block sorting method and system based on thermal imaging and near infrared, and the method comprises the following steps: conveying rubber blocks to pass through a separation station, a detection station and a sorting station; carrying out separation treatment at a separation station; acquiring a thermal imaging image at a detection station to obtain a contour, temperature distribution and candidate abnormal region coordinates; controlling a near-infrared device to perform fixed-point sampling on the candidate abnormal region to obtain moisture characteristic wavelength absorbance; carrying out temperature compensation on the absorbance by utilizing the corresponding surface temperature and then carrying out sorting judgment; generating an instruction according to the judgment result, the position and the speed to control an executing mechanism to act. According to the method, near-infrared fixed-point sampling is guided through thermal imaging positioning, and temperature compensation is combined, so that the problem of insufficient sorting synchronization precision in the prior art is solved, and the accuracy, pertinence and stability of rubber block sorting are improved.

The invention provides a material water content detection method and system based on dual-wavelength infrared light, and relates to the technical field of material detection.The method comprises the steps that an infrared light source is controlled to emit at least two infrared light of different wavelengths to irradiate the surface of a to-be-detected material; receiving reflected light signals of the surface of the to-be-detected material to the infrared light, and acquiring light intensity information of the reflected light signals corresponding to different wavelengths; the average absorbance value of the water content characteristic of the to-be-detected material is constructed according to the ratio relation between the light intensity information of different wavelengths; and performing environmental disturbance compensation on the average absorbance value to obtain a compensated average absorbance value, and inputting the compensated average absorbance value into a preset calibration model to output the water content of the to-be-detected material. According to the scheme, the stability and the reliability of the water content detection of the material in an actual application environment are improved, and the problem of measurement errors caused by environmental changes is solved.

The present application provides an optical unit for housing a sample when measuring the concentration of the sample by absorbance photometry, and can improve workability and measurement accuracy compared with the past. An optical unit (2) is an optical unit for housing a sample used in a concentration measuring device that measures the concentration of a sample by absorbance photometry, and the optical unit (2) includes a housing portion (21) having a long side direction and a short side direction in a horizontal cross section, and a protruding portion (24) extending outward along the short side direction from a side surface of the housing portion (21) along the long side direction.

A magnetic medium is described which includes a thin film magnet structure formed of a ferromagnetic alloy or compound. The thin film magnet structure includes one or more ferromagnetic domains and is coupled to one or more optical structures. Each of the one or more ferromagnetic domains have a magnetization that is switchable between two or more states. Each of the one or more optical structures is configured to increase absorbance of light at a target wavelength in the thin film magnet structure, such that in response to illumination of a ferromagnetic domain with continuous-wave light including the target wavelength, that ferromagnetic domain undergoes all-optical magnetic switching.

A gas measurement device (5) comprises: an absorbance measurement device (10) that emits a detection light into a reaction vessel (2) for generating methane gas, and measures the absorbance of the detection light that has passed through the gas atmosphere inside the reaction vessel (2); an absorbance data analysis unit (21) that spectrally analyzes the absorbance data measured by the absorbance measurement device (10); a peak detection unit (22) that detects a plurality of peak values from the absorbance spectrum analyzed by the absorbance data analysis unit (21); and a pressure calculation unit (23) that calculates the pressure inside the reaction vessel (2) on the basis of the intensity ratio of two peak values among the plurality of peak values detected by the peak detection unit (22).

A compensation method of optical lens includes: providing a lens body with an optical filter, with the lens body having an interference light absorbance portion through which a light beam to pass; providing a first green-confusion absorbance region on the interference light absorbance portion, with the first green-confusion absorbance region having a first blue-green absorbance peak portion; providing a second yellow orange-confusion absorbance region on the interference light absorbance portion, with the second yellow orange-confusion absorbance region having a second yellow-orange absorbance peak portion; and the first blue-green absorbance peak portion absorbing at least one blue-green light while the second yellow-orange absorbance peak portion absorbing at least one yellow-orange light to provide red and green chroma enhancement in vision.

Embodiments relate to a system, a computing device, a computer readable storage medium, and a method to detect a personal care composition. In embodiments, an image capture device may capture values for infrared (IR) radiation from an interaction between light and an ingredient of the personal care composition. In embodiments, a processor may detect the presence of the personal care composition based on the valued for the IR radiation captured by the image capture device. Embodiments further relate to a personal care composition including one or more ingredients to be used as a marker for the personal care composition, selected for an ability to exhibit diffuse reflection or absorbance of IR radiation.

A ceramic scintillator according to an embodiment is formed of a garnet compound containing Pr. The absorptivity of the ceramic scintillator at a wavelength of 320 [nm] is 0.15 or less relative to the absorptivity at a wavelength of 280 [nm].

Disclosed is a concentration ratio measurement method for measuring the concentration ratio of a solution that contains toluene or methylcyclohexane, the concentration ratio measurement method comprising: a step for measuring the absorbance of the solution at a specific wavelength; and a step for calculating the concentration ratio t:m of the concentration t of the toluene to the concentration m of the methylcyclohexane on the basis of a calibration curve that is recorded in advance on the basis of the absorbance. The specific wavelength is at least one wavelength or wavelength range in the wavelength range of 1,120 nm to 1,140 nm inclusive, the wavelength range of 1,190 nm to 1,230 nm inclusive, the wavelength range of 1,620 nm to 1,680 nm inclusive, the wavelength range of 1,730 nm to 1,850 nm inclusive, the wavelength range of 1,800 nm to 2,050 nm inclusive, the wavelength range of 2,150 nm to 2,180 nm inclusive, and the wavelength range of 2,360 nm to 2,420 nm inclusive.

The present invention pertains to a fresh produce provided with a coating. The coating contains a sugar fatty acid ester as a major ingredient. Regarding the heights A and B of absorbance peaks in infrared spectroscopy of the coating on the surface of the fresh, A / B is equal to or more than 0.750. A: An absorbance peak height derived from water at 1635 cm-1 B: An absorbance peak height derived from OH at 3308 cm-1 The present invention addresses the problem of providing a fresh produce in which transpiration of moisture is suppressed while respiration of the fresh produce is appropriately suppressed and which can maintain the marketability thereof for a prolonged period of time by providing, on the fresh produce, a coating that is highly safe, that has oxygen barrier properties, and that has high water-vapor barrier properties. The present invention can also provide a method for stably providing said coating on a fresh produce.

Provided is a transfer film that suppresses the occurrence of optical unevenness and film deformation. The present invention pertains to a transfer film comprising an active energy ray-curable resin layer peelably layered on a base material, wherein the active energy ray-curable resin layer has, in the infrared spectrum, an IR peak absorbance ratio (T810 / T830) between the absorbance (T810) of an IR peak at 810 cm-1 and the absorbance (T830) of an IR peak at 830 cm-1 of 0.60 to 1.20.

A method for monitoring generation of a nucleic acid includes conducting in vitro an amplification reaction or a synthesis reaction to generate the nucleic acid. The method also includes directly monitoring amplification reaction kinetics or synthesis reaction kinetics in real time utilizing a sensor configured to measure an absorbance at a wavelength of between 230 to 285 nanometers utilizing a minimal optical path length.

Determination method for determining the progress of a treatment of a by-product produced in a process for reacting a substance containing a halogen and silicon, or the reaction of a substance containing silicon and a substance containing a halogen, wherein the treatment of the by-product comprises contacting the by-product with a treatment fluid containing water to obtain a first solid, wherein the determination method comprises determining the progress of the treatment of the by-product on the basis of a signal according to a chemical analysis of at least one of a Si-α bond (α is one selected from the group consisting of F, Cl, Br and I) and a Si-H bond of the first solid, where the chemical analysis is a spectroscopic infrared analysis, and containing: Determination that the treatment of the by-product is completed when a value (I1-I2) is reached, assuming an absorbance I1 of a local maximum value in a wavenumber range of 800 cm -1 or more and 900 cm -1 or less an absorbance I2 of a local minimum value in a region of a wavenumber of 900 cm -1 or more and 1000 cm -1 or less and which is located at a higher wavenumber side than the local maximum value, in an infrared spectrum of the first solid is subtracted, is 0.001 or less; Determining that part of the treatment of the by-product is not completed if the value (I1-I2) is more than 0.001 and the absorbance I2 of the local minimum value is 0.130 or less; and Determination that the treatment of the by-product is not completed if the value (I1-I2) is more than 0.001 and the absorbance I2 of the local minimum value is more than 0.130.

The present invention relates to environmental monitoring, and in particular to a method for analyzing the source of black carbon, comprising the following steps: Step 1, collecting data in n cycles, and in each cycle, the absorption coefficient b ji and wavelength λ i Correspondingly, i=1,2…N, we get j The corresponding coefficient k j and the absorption index α j , j = 1, 2…n, α ff =(α j ) min , α bb =(α j ) max ; Step 2, based on the data collected in each cycle, coefficient k j , α ff and α bb , get the k corresponding to each cycle jff ; Step 3, obtain each cycle T j The corresponding k jbb =k j ‑k jff ; Step 4, obtain each cycle T j The corresponding biomass contribution to black carbon concentration BC jbb,% , fossil fuels contribute to black carbon concentrations BC jff,% The present invention has the advantages of accurate analysis and the like, and is applied in the analysis of black carbon sources.

The present invention provides a light-generation system 1000 comprising a first light-generating device 110, a second light-generating device 120, a third light-generating device 130, a luminescent material 200 and a control system 300, wherein (A) the first light-generating device 110 comprises a first laser light source and is configured to generate a first device light 111 having a first device peak wavelength λ1 and having a first spectral power distribution, the first device peak wavelength λ1 being selected from a wavelength range of 445 to 475 nm; (B) the second light-generating device 120 comprises a second laser light source and is configured to generate a first device light 111 having a first device peak wavelength λ1 and having a first spectral power distribution, the first device peak wavelength λ1 being selected from a wavelength range of 445 to 475 nm; (C) the luminescent material 200 is configured to generate a second device light 121 having a second spectral power distribution having a centroid wavelength λ2 different from the first spectral power distribution, the second device peak wavelength λ2 being selected from the range of 420 to 450 nm or the range of 470 to 490 nm; (D) the luminescent material 200 is excitable by the first device light 111 and the second device light 121, and the luminescent material 200 is configured to excite at least a portion of one or more of the first device light 111 and / or the second device light 121 at a centroid wavelength λ2 within a green-orange wavelength range. c,1 (D) the third light generating device 110 has a third laser light source and is configured to generate a third device light 111 having a third device peak wavelength λ3 selected from a wavelength range of 600 to 650 nm; (E) |λ1-λ2|≧20 nm, λ1 and λ2 are selected from a wavelength range of 420 to 490 nm, and |λ c,1 -λ3|≧20 nm; (F) the control system 300 is configured to control at least the first light-generating device 110 and the second light-generating device 120; and (G) the light-generating system 1000 is configured to provide white system light 1001 in an operating mode.

A light absorbing filter includes a chiral anisotropic liquid crystal host having a positive anisotropy and a dichroic light absorbing moiety in association with the host. The filter is characterized by an absorbance Aq for light measured at incident angle q from normal to the filter surface, that is at least 1% higher or at least 1% lower than an absorbance AT predicted by Beer's law when θ is at least 30°. The light absorbing filter may be used in association with an optical element and a light source.

This invention provides a UV spectroscopy apparatus and method for controlled drug waste diversion detection. The spectroscopy apparatus employs sample cells which have optimized optical path length such that the measured maximum absorbance of the drug is less than the detection limit of the system. Hence the full unsaturated absorption spectrum of the drug is revealed in the UV wavelength region from 230 nm (or even down to 195 nm) to 400 nm. This full spectrum analysis improves the specificity for drug identification and the accuracy for drug concentration verification. The spectral library of the apparatus comprises the spectra of common controlled drugs, excipients, as well as typical diluents, which enables the identification of controlled drugs from different manufacturers and / or diluted with different types of diluents.

The present invention belongs to the field of spectroscopy technology, and in particular, relates to a device and method for measuring the absorbance spectrum of a solution. The device includes a continuous spectrum white light source, a cuvette holder, a variable optical path assembled cuvette, a fiber optic spectrometer and a host computer. The variable optical path assembled cuvette is built with a solution to be tested, and the variable optical path assembled cuvette is arranged in the cuvette holder. The white light emitted by the continuous spectrum white light source passes through the solution to be tested and then enters the fiber optic spectrometer. The fiber optic spectrometer is connected to the host computer. The fiber optic spectrometer collects the spectrum of white light under the control of the host computer, and the host computer calculates the absorbance spectrum of the solution to be tested according to the spectrum. The present invention is suitable for trace, strong solvation effect and high transparency solutions, the device has low cost, and can achieve one-time absorbance spectrum measurement.

The present invention discloses a method, system, medium and device for quality detection of Fructus Aurantii, which relates to the technical field of quality detection of traditional Chinese medicines, comprising obtaining the original spectral data of Fructus Aurantii samples, extracting the wavelength-absorbance data pairs from the original spectral data, and determining the original spectral matrix; performing polynomial least squares fitting on the original spectral matrix to determine the derivative spectral data for reflecting the changes in the chemical components of the samples; constructing an analysis model for quality detection of Fructus Aurantii based on the PLS-LDA combined model and the LightGBM gradient boosting decision tree, inputting the derivative spectral data into the analysis model, and obtaining the final detection result of the quality of Fructus Aurantii.

The invention relates to the technical field of gas monitoring, and discloses a laser methane dust interference resistance detection method and system based on dual-light-path collaboration, and the system comprises an open light path module, a closed light path module and a drive circuit module; the closed light path module comprises a spectroscope and a trapezoidal air chamber; the driving circuit module comprises a DFB laser, a first photoelectric detector and a second photoelectric detector; the DFB laser emits laser, the laser enters the closed light path module after being reflected by the open light path module, the closed light path module divides the laser into a test light beam and a reference light beam, and the test light beam is transmitted to the first photoelectric detector. According to the laser methane dust interference resistance detection method and system based on dual-light-path cooperation, the reference light path can be used for locking the position of a gas absorption characteristic, common-mode noise caused by dust can be reduced through dual-light-path absorbance signal elimination, and the dust interference influence is relieved from the aspect of signal demodulation.

Concentrations of individual hydrocarbons in a gas mixture are determined by measuring absorbance of mid-infrared radiation at specific wavelengths. Computation enables determination of concentrations of individual hydrocarbons despite overlaps of absorption bands.