68 results about "Absorbance" patented technology

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.

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.

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.

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.

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.

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.

Copper containing near-infrared absorbing glass compositions, articles comprising the same, methods of making the same, and methods of using the same are provided. Such glass compositions include in mole percent on an oxide basis and by a fluorine content: P2O5: 30-40; SiO2: 0-10; K2O: 0-15; ZnO: 15-40; CaO: 0-12; SrO: 0-20; MgO: 0-10; BaO: 0-12; CuO: 4-18; Al2O3: 1-7; Li2O: 1-20; Na2O: 0-10; Sb2O3: 0-5; and total fluorine (F): 1-60. The combined concentration of RO is in a range from 20 to 40, and the combined concentration of R'2O is in a range of from 2 to 18. RO is selected from MgO, CaO, SrO, BaO, and ZnO, and R'2O is selected from Li2O, Na2O, and K2O. The glass compositions have red-shifted cutoff wavelength and good transmittance of visible light and good absorbance in near-infrared wavelength ranges and are suitable for use as an optical filter for a camera.

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.

The invention relates to a method and device for predicting the water content of crude oil based on a near infrared spectrum, and the method comprises the steps: collecting the near infrared spectrum of to-be-detected crude oil, and obtaining the corresponding absorbance; the absorbance is a result obtained after corresponding wavelength point selection is carried out from the original spectral absorbance, and the wavelength point selection is based on the deviation of the corresponding change of the moisture change of the crude oil on the representation of the original spectral absorbance; the absorbance of the crude oil to be measured is input into a crude oil water content prediction model, the water content of the crude oil to be measured is obtained, and the crude oil water content prediction model is obtained through training according to the absorbance of the near infrared spectrum of the water-containing crude oil sample. Therefore, the subtle change of the water content of the crude oil can be identified, a new solution is provided for analyzing subtle property differences of complex samples, and the applicability of a near-infrared analysis technology is improved.

The present invention relates to the technical field of light therapy beds, and specifically discloses an energy control method and system for a light therapy bed in a space capsule, including: obtaining the real-time irradiation distances of multiple infrared lamps of the light therapy bed, and obtaining the first irradiation energy values of the corresponding infrared lamps according to each of the real-time irradiation distances; obtaining the real-time irradiation light spots corresponding to the infrared lamps according to the first irradiation energy values; obtaining the skin absorbance corresponding to the position of the real-time irradiation light spot; obtaining regional division information according to the real-time irradiation light spot, wherein the regional division information includes an outer ring sampling area, a middle ring sampling area, and an inner ring sampling area. By monitoring the distance between the infrared lamp and the skin in real time and dynamically adjusting the first irradiation energy value of each infrared lamp according to these distances, the present invention ensures that the change in the distance between the light source and the skin during the infrared lamp irradiation process does not affect the infrared lamp irradiation effect.

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.

This invention relates to the field of electrochemical experimental technology, specifically to a noise processing method for surface-enhanced in-situ electrochemical infrared data. By introducing 99.99% pure nitrogen gas into the infrared spectrometer to remove water vapor, and automatically and continuously acquiring spectral information at different voltages within the range of -0.8 to 0.8 V at 0.05 V intervals, until the carbon dioxide double peak intensity is between 2240 and 2400 cm⁻¹, the method continues until the carbon dioxide double peak intensity is between 2240 and 2400 cm⁻¹. ‑1 The peak size decreases until it almost disappears; the last two background data points A and B collected in the above spectral information are converted to obtain the infrared spectrum C of water vapor; the infrared spectrum C is normalized by maximum and minimum data to obtain the normalized water vapor peak data D; the water vapor peak data D is then divided into peaks at 2200-3000 cm⁻¹. ‑1 The carbon dioxide peak is subtracted from the range to obtain the water vapor infrared spectrum E. The absorbance F of the infrared spectrum data to be subtracted and the numerical matrix E of the water vapor spectral intensity are imported into MATLAB 2023B software. After the subtraction calculation is performed, the subtracted infrared spectrum data is output. This method is more efficient and accurate than the traditional manual subtraction.

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