43 results about "Absorbance" patented technology

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.

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].

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.

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.

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.

The invention discloses a rapid safflower quality detection method based on an ultraviolet-visible-near infrared spectrum and a related device, and relates to the technical field of rapid traditional Chinese medicine quality detection.The method comprises the steps that firstly, spectral response data of a to-be-detected safflower sample at all wavelengths of an optimal characteristic wavelength set is obtained; the wavelength set is divided into subsets according to four quality indexes of hydroxysafflor yellow A content, kaempferol content, haematochrome absorbance and moisture content, and the wavelength of each subset is a wave band with the highest correlation of the corresponding indexes; secondly, respectively inputting the spectral data of each subset into a corresponding Levenberg-Marquardt algorithm prediction model, so as to obtain predicted values of four indexes; the problems that in the prior art, single-index detection is not comprehensive, and a traditional method is complex in pretreatment, long in detection period and high in equipment cost are solved, model fitting is accurate, complex operation is not needed, and the requirement for the professional level of personnel is lowered.

The invention belongs to the technical field of agricultural product detection, and particularly relates to an infrared-based rice oil content detection method which comprises the following steps: S1, acquiring infrared spectrum data and a projection image of a to-be-detected rice sample, and calculating the average length, the average width, the spectrum baseline drift distance and the total full-band absorbance of the to-be-detected rice sample; s2, constructing a morphological scattering coupling index according to the ratio of the average length to the average width, the spectral baseline drift amount and the total full-band absorbance, and calculating an adaptive wavelet denoising threshold by using the morphological scattering coupling index; and S3, carrying out denoising processing on the infrared spectrum data by utilizing the self-adaptive wavelet denoising threshold. According to the method, the mapping relation between the morphological characteristics and the signal processing parameters is established, scattering noise generated by particulate matter physical morphology is effectively eliminated, and the accuracy and stability of oil content detection of the slender grain type rice are remarkably improved.

This beta-sialon phosphor contains europium in a solid solution, and is configured such that, in a spectrum of the beta-sialon phosphor as determined by FT-IR, the absorbance of the spectrum is converted to a KM value by the Coubella-Mongolian function, and when the KM value at a wavenumber of 3050 cm-1 is E, the KM value at a wavenumber of 3330 cm-1 is F, and the KM value at a wavenumber of 3500 cm-1 is G, the absorbance of the spectrum is calculated by the KM value at the wavenumber of 3500 cm-1. E, F and G satisfy 1.8 < F / E and 1.8 > G / E.

This invention provides a continuous-variable quantum key modulation system and a method for fabricating an optical waveguide unit, belonging to the field of quantum communication. It includes an integrated amplitude modulation module and a modulation control module. The integrated amplitude modulation module comprises an optical waveguide unit with an integrated Mxene film, a modulation light input unit, and a signal light coupling unit. The modulation control module receives modulation commands and transmits the corresponding modulation parameters to the integrated amplitude modulation module. The modulation light input unit receives modulation light and excites the saturable absorbance of the Mxene film according to the input light power. The signal light coupling unit receives signal light and couples the signal light and modulation light to the optical waveguide unit. The optical waveguide unit is used to perform full-amplitude modulation of the modulation light and signal light based on the modulation frequency after the saturable absorbance of the Mxene film is excited to obtain a modulated optical signal. Because the system can stably output ideal pulsed light, it avoids the information leakage problem caused by imperfect optical pulses.

Disclosed is an apparatus (100) for determining oxygen saturation with skin tone correction. The apparatus includes first (102) and second (104) probes adapted to be disposed on a body portion (106) having first through third absorbers, and configured to emit and detect light signals corresponding to a set of wavelengths. The apparatus further includes processing circuitry (116) coupled to the probes and configured to: determine reflectance and transmittance values based on the detected light signals; determine and rescale first and second sets of absorbance values corresponding to the reflectance and transmittance values; determine first through third coefficients of the first through third absorbers; and determine an oxygen saturation value based on the first and second coefficients such that the oxygen saturation value is corrected for skin and tissue absorption.

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.

To provide a cured product of a photocurable composition capable of achieving both a higher refractive index and heat resistance, an optical component, a light-emitting device, and a module.SOLUTION: The cured product of the photocurable composition contains metal oxide nanoparticles, an acrylate resin having a fluorene skeleton, and an acrylate resin having a tetrahydrofuran and ethylene skeleton. In a distribution of absorbance obtained for each wave number by infrared spectrometry, a ratio Io / Ie of an area Io in a wave number range of 3100 to 1130cm - 1 to an area Ie in a wave number range of 1075 to 3700cm - 1 is 2 or more and 5 or less.SELECTED DRAWING: Figure 4

The invention provides a protein purification analysis method based on optical detection and an artificial intelligence system, which relates to the technical field of artificial intelligence, and comprises the following steps: injecting a protein sample to be analyzed into a chromatographic separation system for purification treatment; a four-channel parallel light path structure is adopted to collect multi-dimensional spectral data such as absorbance, fluorescence intensity, light scattering intensity and circular dichroism spectrum signals in real time, and crosstalk between channels is eliminated by using a self-adaptive signal compensation algorithm; inputting the compensated multi-dimensional spectral data into a pre-trained deep neural network model, extracting spectral features and time sequence features through a convolution layer and a circulation layer, and generating a purified feature vector; and on the basis of the vector, a layered reinforcement learning method is adopted to carry out real-time optimization adjustment on process parameters such as flow velocity, gradient, pH value and the like of the chromatographic separation system. According to the invention, accurate monitoring and intelligent control of the protein purification process can be realized, and the purification efficiency and the product quality are improved.

A light filtering glass container including a glass container coated with a light filtering coating obtained by curing a polymerizable composition including semi-conductive nanoparticles. The absorbance through a 5-micrometer thick light filtering coating is greater than 0.5 for each light wavelength ranging from 350 nm to λcut, λcut being in the range from 420 nm to 480 nm, and the difference of lightness between the uncoated glass container and the glass container with the light filtering coating is lower than 5.

In the past, in the light scattering detection method, a high concentration sample deviating from the quantitative range required retesting, requiring a long measurement time. Therefore, for the reaction solution of the sample and the reagent, the first light amount value is obtained from the absorbance photometer, and the second light amount value is obtained from the scattering photometer. According to the second light amount value at the first measurement point determined in advance, it is determined whether quantitative analysis based on the second light amount value can be performed. In the case where it is determined that quantitative analysis based on the second light amount value is not performed, the reagent is additionally dispensed into the reaction solution, and quantitative analysis based on the first light amount value at the measurement point after the additional dispensing is performed.

Introduced here is an approach to programmatically addressing the absorbance of light by analyte molecules whose binding, for example, to an interferometric sensor, is being monitored by an interferometric sensing system. A first light signal may be shone upon a biolayer over the course of a biochemical test, and the light reflected by the biolayer may form a second light signal that is detectable by a detector of an interferometric sensing system. Through analysis of the second light signal, the second light signal can be deconvolved into a reflection component and an absorbance component. If the principal component of the second light signal is the reflection component, then one algorithm may be employed to establish the binding magnitude. If the principal component of the second light signal is the absorbance component, then another algorithm may be employed to establish the binding magnitude.

This invention provides a fiber optic spectrometer measurement method, comprising: acquiring a light to be measured; substituting the pixel number of the light to be measured into a calibrated wavelength variation curve polynomial to obtain the wavelength corresponding to the pixel number; plotting the spectral curve of the light to be measured based on the correspondence between the wavelength and the pixel number; calculating and analyzing the parameter characteristics of the light to be measured based on the spectral curve, wherein the parameter characteristics include at least one or more of reflectivity, transmittance, absorbance, and chromaticity coordinates. This invention uses standard light source spectral calibration to obtain the wavelength variation curve polynomial of the standard light source spectrum. The measured spectral curve is fitted using this wavelength variation curve polynomial, correcting the testing deviation between spectrometers of different specifications and improving testing accuracy; it also enables multiple testing functions and is highly practical.

Described is an absorbance detector that can be used, for example, to detect analytes in a chromatography system flow. The absorbance detector includes separate temperature controlled zones that can be operated at different temperatures. A first temperature controlled zone includes a light source to provide light to probe a flow cell. A second temperature controlled zone includes the flow cell, a photodiode array and an optical system that is configured to direct light from the light source through the flow cell and to spectrally disperse the light across the photodiode array. The first and second temperature controlled zones may include a first housing and a second housing, respectively, to substantially enclose the components of their respective zones and to thermally isolate the zones from each other. A thermal isolator may be disposed between the temperature controlled zones to reduce heat transfer.

To provide an infrared radiation-absorbing material fine particle dispersion liquid and dispersion body which have high transmittance for light in the visible light region and have absorbance in the near-infrared region, and which can be adjusted to a neutral color between blue and bronze. Provided is an infrared radiation-absorbing material fine particle dispersion liquid or dispersion body comprising infrared radiation-absorbing material fine particles and iron oxide (Fe2O3) fine particles in a liquid or solid medium, wherein the infrared radiation-absorbing material fine particles are formed of composite tungsten oxide fine particles which are represented by a general formula MYWOZ (where the element M is an element selected from Cs, Rb, K, Tl, In, and the like, W is tungsten, 0.001≤Y≤1.0, and 2.2≤Z≤3.0), and which have a hexagonal crystal structure, and a mass ratio between the iron oxide fine particles and the composite tungsten oxide fine particles contained in the liquid or solid medium [iron oxide fine particles / composite tungsten oxide fine particles] is 0.01 or more and 0.1 or less.

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.

In one aspect, a system is disclosed, which includes at least one capillary configured for receiving a sample, a first light source for generating a first light, a second light source for generating a second light, an optical element for receiving and directing the first and the second light into the at least one capillary, an absorbance detector, and a shutter positioned between the absorbance detector and the at least one capillary. The shutter is movable between an undeployed position and a deployed position. In the undeployed position, at least a portion of the first light passing through the at least one capillary can be received by the absorbance detector. In the deployed position, the shutter inhibits back reflection of the light exiting the at least one capillary to the at least one capillary.

A sensor including a light-receiving element; and an optical element that includes near infrared absorbing dichroic substance. The optical element has an absorption axis with respect to near infrared light in an in-plane direction. When linearly polarized light of near infrared light orthogonal to the absorption axis is radiated from a normal direction of the optical element and from a direction inclined by 45° from the normal direction at an azimuthal angle orthogonal to the absorption axis, an absorbance during the radiation from the direction inclined by 45° from the normal direction is more than an absorbance during the radiation from the normal direction.