Class / Patent application number | Description | Number of patent applications / Date published |
250339120 | Using sample absorption for chemical composition analysis | 27 |
20080272303 | MOBILE FUEL ANALYSIS APPARATUS AND METHOD THEREOF - The invention provides a method for determining fuel quality and ethanol content. A mobile fuel analysis apparatus including a vehicle is provided. A database includes near-infrared spectra of standard fuel from a plurality of suppliers to establish correlation between quality parameter and the spectra of the oils. A near-infrared spectrometer is equipped on the vehicle and transported to a fuel distribution point. A near-infrared spectrum of a fuel sample is collected from the fuel distribution point. The collected spectrum is compared to the near-infrared spectra in the database, and converted into corresponding quality parameters. | 11-06-2008 |
20090121138 | Measuring Near Infra-Red Spectra Using a Demountable Nir Transmission Cell - A process for measuring the NIR spectrum of a sample using a demountable NIR transmission cell of pathlength 2.5 mm or less, said process comprising: (a) measuring the etalon fringes that arise when NIR light passes through the NIR cell in the absence of a liquid sample, (b) using this to calculate the pathlength of the NIR cell (c) introducing the sample to be analyzed in to the NIR cell, and (d) measuring the NIR spectrum of the sample. | 05-14-2009 |
20090134331 | METHOD OF EVALUATING SKIN CONDITIONS AND METHOD OF ESTIMATING SKIN THICKNESS - Methods of determining at least one of the degree of skin damage caused by UV light and the degree of physiologically aging of the skin, and methods of estimating at least one of an epidermal skin thickness and a dermal skin thickness by analysis of the near infrared absorption spectrum of skin are disclosed. The near infrared absorption spectrum of skin are analyzed and the obtained analysis result is used for monitoring skin conditions and evaluating cosmetics. | 05-28-2009 |
20090146061 | DEVICE FOR ANALYSING COMPOSITION OF CONTENTS OF A CONTAINER - The invention relates to a device for analysing the composition of the contents of a container comprising:
| 06-11-2009 |
20090194699 | Sensing apparatus having an optical assembly that collimates emitted light for detection - An apparatus for optical sensing of samples includes an optical source, an optical assembly, a sample holder, an objective lens, and a detector. The objective lens collimates light emitted by the sample. Preferably, the optical assembly rotates about an axis, allowing the sensing apparatus to sense results from plural locations on a sample without moving the sample. Moving the sample in a linear direction while rotating the optical assembly allows sensing of an entire sample. Preferably, light from the optical source enters the optical assembly along the axis of rotation. Sensing methods consistent with the invention are also described. | 08-06-2009 |
20090294673 | High-volume on-line spectroscopic composition testing of manufactured pharmaceutical dosage units - Disclosed are pharmaceutical dosage unit manufacturing process control apparatus and methods. These can include acquiring a plurality of multi-pixel images of a flow of pharmaceutical dosage units at different wavelengths along an axis that is perpendicular to a direction of the flow of pharmaceutical dosage units, processing the images acquired in the step of acquiring, and providing an indication about the flow of pharmaceutical dosage units based on the step of processing. | 12-03-2009 |
20100096552 | METHOD FOR PREDICTING HYDROCARBON PROCESS STREAM STABILITY USING NEAR INFRARED SPECTRA - A method of predicting the stability of a hydrocarbon process stream is disclosed and claimed. The method includes obtaining samples from one or more process streams and measuring the actual stability and the near infrared spectral absorbance of those samples. A classification model is initially developed to identify sample subsets and correlation model is created using the stability and absorbance data by inserting that data into a mathematical function. Online or offline measurements are then taken from the hydrocarbon process stream, the classification model is used initially to identify the subset and corresponding correlation model is used to predict the stability of the stream. | 04-22-2010 |
20120018638 | DETECTION AND IDENTIFICATION OF SOLID MATTER - Detection and identification of minute quantities of condensed or solid state materials with significantly improved performance over the present state-of-the-art, comprises illuminating a small target particle with an appropriate laser radiation at a wavelength that is strongly absorbed by the target. The resulting temperature rise is observed by monitoring the increased blackbody radiation from the sample. An unambiguous determination of the target compound or the target material composition can be achieved through the use of a tunable laser that generates an absorption fingerprint of the target. | 01-26-2012 |
20120217403 | A METHOD AND DEVICE FOR IDENTIFYING A MATERIAL - A material may be identified using THz radiation that simultaneously or sequentially includes at least one first frequency portion and a second frequency portion different therefrom. An object formed from the material to be identified is irradiated with the THz radiation and the THz radiation exiting the object is detected using a phase-sensitive THz receiver. A time or phase offset, caused by the object, is measured at least for the first frequency portion and a material thickness is determined therefrom. Attenuation of the received signal, at least for the second frequency portion, is determined. An absorption coefficient for at least the second frequency portion is calculated using the material thickness. | 08-30-2012 |
20130026367 | DETERMINATION OF A LIPID WATER RATIO - The present invention relates to an apparatus, a method and a computer program for determining a lipid-water ratio and a scattering parameter of a sample. In particular, the invention relates to an apparatus comprising a light source and a detector arranged to measure an optical parameter at various wavelengths, where the wavelengths are selected so that at two of the wavelengths the absorption coefficients for both water and lipids are substantially identical. This enables determination of a scattering parameter. A further measurement at a third wavelength enables determination of a water-lipid ratio. According to a specific embodiment, the light source and the detector are arranged in relation to an interventional device, so as to be able to examine a tissue in terms of lipid-water ratio and scattering during an intervention. | 01-31-2013 |
20140014841 | DIRECT AND QUANTITATIVE BROADBAND ABSORPTANCE SPECTROSCOPY WITH MULTILAYER CANTILEVER PROBES - A system for measuring the absorption spectrum of a sample is provided that includes a broadband light source that produces broadband light defined within a range of an absorptance spectrum. An interferometer modulates the intensity of the broadband light source for a range of modulation frequencies. A bi-layer cantilever probe arm is thermally connected to a sample arm having at most two layers of materials. The broadband light modulated by the interferometer is directed towards the sample and absorbed by the sample and converted into heat, which causes a temperature rise and bending of the bi-layer cantilever probe arm. A detector mechanism measures and records the deflection of the probe arm so as to obtain the absorptance spectrum of the sample. | 01-16-2014 |
20140042323 | METHOD AND APPARATUS TO USE MULTIPLE SPECTROSCOPIC ENVELOPES TO DETERMINE COMPONENTS WITH GREATER ACCURACY AND DYNAMIC RANGE - A method of using spectroscopic envelopes for determining components in a sample may include selecting spectroscopic envelopes and passing input light through a sample comprising at least one absorbing component is provided. The method includes measuring throughput light with a photo-detector and determining the concentration of the at least one absorbing component in the sample using the measured throughput, wherein at least one of the plurality of spectroscopic envelopes overlaps at least one absorption band of the at least one absorbing component in the sample. An apparatus for determining components in a sample including an input light source having a spectrum and a sample container having a fixed optical path-length is also provided. The apparatus may include a plurality of pre-selected spectroscopic envelopes to select spectral portions of the throughput light from the sample; and at least one photo-detector to measure the throughput light selected by the spectroscopic envelopes. | 02-13-2014 |
20160076998 | DETECTION OF CHEMICAL CHANGES OF SYSTEM FLUID VIA NEAR INFRARED (NIR) SPECTROSCOPY - An apparatus and method for determining quantity of water and dissolved gases in a fluid system during operation. The method and apparatus uses a sensor on the fluid system to determine the properties during operation by applying NIR (near infrared) Spectroscopy. The detection of water (including discrimination of form of water) is determined using NIR spectroscopy. In one implementation this is done by guiding a laser LED tuned to | 03-17-2016 |
20160377532 | GAS SENSOR KIT AND GAS MEASUREMENT SYSTEM - To provide a gas sensor kit and a gas measurement system in which a problem in arrangement of a signal processor and an atmospheric pressure sensor at the time of measuring a gas is solved. A gas sensor kit includes a sensor and a connector. The connector includes an atmospheric pressure sensor measuring an atmospheric pressure and a signal processor. The signal processor receives a measurement signal indicating a transmitted light quantity of a target gas from the sensor and obtains a measurement value of a concentration or a partial pressure of the target gas based on the measurement signal. The signal processor corrects the measurement value of the concentration or the partial pressure of the target gas by using an atmospheric pressure value measured by the atmospheric pressure sensor. | 12-29-2016 |
250339130 | With gaseous sample | 13 |
20080277586 | Low-Power Fast Infrared Gas Sensor, Hand Held Gas Leak Detector, and Gas Monitor Utilizing Absorptive-Photo-Acoustic Detection - A gas sensor for sensing the presence of a gas includes an IR source, a microphone, a reference gas substantially similar to the gas to be detected, a reference body defining a reference chamber therein, the reference chamber having a pressure port coupled to the microphone, and a broad-band optical window through which at least IR wavelengths corresponding to absorption peaks of the predetermined gas may pass. The window is disposed between the IR source and reference chamber. The reference gas is contained within the reference chamber between the optical window and the microphone. The sensor can be included in a hand-held gas detection instrument having power supply, an outer shell, a circuit board assembly including sensor circuitry, a suction pump, actuation controls and status indicators. A probe defining a lumen therethrough supplies the sample gas. | 11-13-2008 |
20090146062 | GAS MEASUREMENT SYSTEM - A gas measurement system of this invention includes a housing adapted to be mounted on an airway adapter, and a luminescence quenching gas measurement assembly disposed in the housing. The luminescence quenching gas measurement assembly includes a source disposed in a first plane, and at least one detector also disposed in the first plane. | 06-11-2009 |
20100025585 | GAS DETECTING METHOD AND GAS DETECTING APPARATUS - A concentration of ethanol is detected without using any light source such as a lamp by utilizing a face of a human being as a light source. The gas detecting apparatus has an optical filter for ethanol which allows to transmit an infrared light having a predetermined wavelength band including an absorption spectrum derived from a C—O stretching vibration of ethanol contained in breath in an absorption spectrum generated by interaction with infrared light emitted from the face of a person, an optical filter for reference that allows to transmit an infrared light having a wavelength band emitted from the face of the person, a converting component for ethanol that converts the infrared light transmitted through the optical filter for ethanol to electric signals, a converting component for reference that converts an infrared light transmitted through the optical filter for reference to electric signals, and a detection component that detects the concentration of ethanol gas based on the electric signals converted by the converting component for ethanol and the electric signals converted by the converting component for reference. | 02-04-2010 |
20100258728 | Saturation Filtering NDIR Gas Sensing Methodology - NDIR gas sensing methodology is advanced which renders the output of an NDIR gas sensor, when implemented with this new methodology, to remain stable or drift-free over time. Furthermore, the output of such a sensor will also be independent of the temperature of an environ wherein the sensor is in physical contact. This method utilizes the same narrow band-pass spectral filter for the detection of the gas of interest for both the signal and the reference channels. By so doing, the two channels always receive radiation of the same spectral content from the infrared source of the sensor convoluted with that from any external elements exposed to the sensor. While the same sample chamber through which the gas of interest to be detected flows is shared by the two channels, the detector package for the reference channel is hermetically sealed with 100% of the gas to be detected instead of 100% N | 10-14-2010 |
20100327167 | Spectroscopic gas sensor and method for ascertaining an alcohol concentration in a supplied air volume, in particular an exhaled volume - A spectroscopic gas sensor is disclosed, which has at least: an IR radiation source for emitting IR radiation, a measuring volume to be completely or partially filled with an air supply volume, in particular an exhaled air, a detector unit having at least one, preferably two detector elements for detecting the IR radiation passing through the measuring volume in at least one first wavelength range and outputting measuring signals, and an analyzer unit for recording the measuring signals and ascertaining a concentration of a measured substance in the air supply volume. A first detector element measures IR radiation in a wavelength range of an absorption band of the measured substance, and the analyzer unit ascertains a concentration of the measured substance in the air supply volume from the ascertained concentrations of the measured substance and a further component in the measuring volume. For this purpose, a second detector means measures the concentration of the further component of the air supply volume, preferably as a second spectroscopic detector element. | 12-30-2010 |
20120241622 | METHOD FOR DETERMINING THE 14C CONTENT OF A GAS MIXTURE AND ARRANGEMENT SUITABLE THEREFOR - A method for determining the | 09-27-2012 |
20120241623 | Chemical Species Optical Sensor Operating in Infrared - The invention relates to a chemical species optical sensor comprising: a fluorescent source ( | 09-27-2012 |
20120298868 | Laser Based, Temperature Insensitive, Carbon Dioxide Isotope Ratio Measurement - An apparatus and method (and related kit) for determination of the isotopic ratio of | 11-29-2012 |
20130087709 | MERCURY GAS SENSING USING TERAHERTZ TIME-DOMAIN SPECTROSCOPY - Disclosed are methods and apparatuses for detecting mercury species in various gas streams, such as those generated from fossil fuel combustion. | 04-11-2013 |
20130334419 | METHOD AND APPARATUS FOR REMOTE DETECTION OF ALCOHOL VAPORS IN THE ATMOSPHERE - A light beam generated by a light source having a wavelength corresponding to the ethanol absorption spectrum, preferably in the wavelength range of 3.28-3.52 μm or in one or more wavelength ranges 6.49-7.46 μm, 7.74-8.33 μm, 8.84-10.10 μm, 10.7-12.00 μm, is sent through a measuring space containing a sample of exhaled breath, and then the intensity of the light beam passing through the measuring space is measured. Based on the spectral analysis of the dependence of the light intensity to the alcohol concentration, the concentration of ethanol vapor is determined and the information about the level of the ethanol content is provided to a suitable display or device. | 12-19-2013 |
20140361173 | Device and Method for Identifying Refrigerants - A device for identifying refrigerants includes a gas cell, which has a test gas inlet and a test gas outlet, an infrared source that radiates through the gas cell, and at least one sensor that detects the infrared radiation that passes through the gas cell. At least one wide-band filter is provided between the infrared source and the sensor. The passband of the at least one wide-band filter includes the absorption spectra of the refrigerants to be detected and does not include the absorption spectrum of hydrocarbons. The gas cell is connected to a cartridge, which contains the refrigerant to be detected in pure form as a reference gas. | 12-11-2014 |
20160377533 | GAS MEASURING APPARATUS, GAS MEASURING METHOD AND GAS CELL - A gas measuring apparatus of an embodiment includes a light source, a gas cell and a detection portion. The light source emits infrared light. Into the gas cell, gas containing | 12-29-2016 |
20160377534 | GAS MEASURING APPARATUS - A gas measuring apparatus includes a cell portion, a light source portion, a detection portion, and a control portion. The cell portion includes a space into which a sample gas containing breath containing a first isotope of carbon dioxide and a second isotope of carbon dioxide is introduced. The light source portion changes a wavelength of the light in a band of 4.345 μm or more and | 12-29-2016 |