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US20080064975 SPECTROSCOPIC BREATH ANALYSIS  
Methods and apparatus for the analysis of exhaled breath by spectroscopy are disclosed. An optical cavity containing the exhaled breath, typically comprising a pair of opposing high reflectivity...
US20080231857 Sensor system and sampling cell assembly for use with sensor system  
A sensor system for detection of a gaseous chemical substance is provided, which includes an optical sampling cell holding a sampling chamber of a volume of at most 20 mm3, a light emitter and a...
US20150185144 LASER GAS ANALYZER  
A laser gas analyzer includes a wavelength-variable laser having a wide wavelength-variable width, a light-split module configured to split an output light of the wavelength-variable laser into a...
US20100007876 HOLLOW-CORE WAVEGUIDE-BASED RAMAN SYSTEMS AND METHODS  
Embodiments of the invention include a method for sensing. Other embodiments include a method for sensing molecules, for example, homonuclear diatomic molecules. The method may include...
US20070133001 Laser sensor having a block ring activity  
A sensitive fluid sensor for detecting fluids and particularly trace fluids. The sensor may be adjustable for detecting fluids of various absorption lines. To effect such adjustment, a tunable...
US20070182965 Linked extendable gas observation system for infrared absorption spectroscopy  
A modular system for gas analysis has a first gas cell that receives and passes at least a portion of an infrared light beam through at least a portion of the first gas cell. A second gas cell...
US20150329267 CONTAINER FOR FOOD PRODUCTS, A METHOD FOR MANUFACTURING OF A CONTAINER, METHOD FOR DETECTING INTERNAL GAS AND A PRODUCTION SYSTEM FOR FILLING CONTAINERS  
The invention concerns a container for food products or other sensitive products, said container being made of a material that intends to provide the container with gas-tight properties and that...
US20070229834 System and method for high sensitivity optical detection of gases  
A method and apparatus architecture for detecting gases, particularly hazardous gases which should be detected in miniscule amounts. High sensitivity detection of chemical warfare agents (CWAs) is...
US20060044562 Gas monitor  
Gas detection or monitoring apparatus mainly comprising, an optical source unit including a tunable diode laser, an optical detection unit including a light sensitive detector, the source and the...
US20120194818 Gas Analyzer for Measuring the Mercury Content of a Gas  
The invention relates to a gas analyzer for measuring the mercury content of a gas having an Hg light source which transmits transmitted light having wavelengths of at least one spectral line of...
US20050122523 Device and method of trace gas analysis using cavity ring-down spectroscopy  
An apparatus and method for analyzing an impurity on a gas is provided. The apparatus includes a first cell containing a first gas with the impurity and a second cell containing a second gas...
US20100027015 Optical sensor  
The invention relates to an optical device with at least one radiation source (11), a detector (16), a light guide (12) for the primary radiation and a light guide (17) for further conducting the...
US20090257064 Optical Absorption Spectrometer and Method for Measuring Concentration of a Substance  
An optical absorption spectrometer is provided for determining the concentration of a substance within a sample. The optical absorption spectrometer comprises a first radiation source for...
US20100005893 METHOD OF MONITORING PRESSURE OF A GAS SPECIES AND APPARATUS TO DO SO  
A method of monitoring pressure of a gas species up to at most a predetermined maximum pressure value is disclosed. The method includes exposing the gas species to transmission of laser light,...
US20070081162 Method And Apparatus For Determining Marker Gas Concentration Using An Internal Calibrating Gas  
A method and an apparatus for measuring the concentration of a specific gas component of a gas mixture including another gas whose concentration is independently known using light absorption...
US20100302546 OPTICAL MEASUREMENT OF SAMPLES  
A portable device includes a base unit, an extension, and a mirror. The base unit includes a light source, a light detector, and at least one window through which light exits from, and is received...
US20090128819 LOW COST APPARATUS FOR DETECTION OF NITROGEN-CONTAINING GAS COMPOUNDS  
Nitrogen-containing compounds are detected by chemically converting (210) them to nitrogen dioxide, and detecting (10) the amount of nitrogen dioxide. A semiconductor laser or light emitting diode...
US20080198027 Infrared Laser Based Alarm  
The subject invention relates to a new alarm which is based on using a quarternary tunable Mid-IR laser to measure both particles and gas at the same time. The measurement is done within an area...
US20080291452 Optical Switching Device  
Optical switching device comprising a substrate on which a magnesium transition metal layer such as a magnesium nickel metal layer is provided. At supplying of hydrogen the magnesium transition...
US20080198381 Pressurized detectors substance analyzer  
An apparatus, system and method to measure the concentration of a constituent element in a gas sample contained in an analyzer. A sample cell has an inlet and an outlet. The inlet is to receive a...
US20130008224 METHOD FOR CALIBRATION OF A CO2 CONCENTRATION SENSOR AND A MEASURING DEVICE  
This publication discloses a method for calibrating a CO2 concentration measuring device, in which method gas concentration is measured in a room. In accordance with the invention presence of...
US20090323055 CRDS BREWSTER GAS CELL  
A toxic gas sensor or device which is a cavity ring-down spectroscopy device having two or more mirror components. Each of the mirror components has two Brewster windows attached to it. The...
US20050254056 System and method for controlling the light source of a cavity ringdown spectrometer  
A system and method for controlling the light source of a cavity ring-down spectrometer (CRDS). The system comprises a resonant optical cavity having at least two high reflectivity mirrors; a...
US20120009694 APPARATUS AND METHOD FOR MONITORING PRECURSOR FLUX  
An apparatus and method for monitoring precursor flux is disclosed herein. The apparatus comprises an optical cell configured for electromagnetic radiation spectroscopy and has a precursor...
US20060012794 Optical sensor system and method for detection of hydrides and acid gases  
A gas sensor for detection of hydride and/or acid gas species, featuring a color changing material that changes color in exposure to hydride and/or acid gas species, component(s) for impinging...
US20120013472 Systems and Methods of Monitoring Combustible Gases in a Coal Supply  
A method of monitoring a coal supply includes receiving a sampled level of at least one combustible gas in the coal supply from a combustible gas sensor device embedded in the coal supply,...
US20060109470 Measuring environmental parameters  
Intensity measurements characterizing at least two absorption lines for a molecule of interest within at least one sample of gas may be used to calculate at least one ratio which may be associated...
US20150276586 MERCURY VAPOR TRACE DETECTION USING PRE-EXCITATION CAVITY RING DOWN SPECTROSCOPY  
Apparatus and techniques can include optically exciting an analyte gas in an optically-resonant cavity using optical energy having a first range of wavelengths including a wavelength specified to...
US20120188550 Gas Concentration Measurement Device  
In a gas concentration measurement device using a TDLAS measurement, the distortion of peak waves originating from absorption by target components is prevented by reducing a higher-frequency noise...
US20120281221 PROCESS AND MEASURING EQUIPMENT FOR IMPROVING THE SIGNAL RESOLUTION IN GAS ABSORPTION SPECTROSCOPY  
Process and measuring equipment for improving the signal resolution in gas absorption spectroscopy, wherein the measuring equipment includes a laser light source, a light detector and a measuring...
US20120170043 Sensitive and Compact Sensor Employing a Visible Diode Laser and A High Finesse Optical Cavity for Trace Gas Detection (NO2)  
A sensor with high sensitivity and selectivity for the detection of NO2 uses a simple diode laser operating nominally at 405 nm in the visible region, a high finesse optical cavity and a low noise...
US20100014094 DISTRIBUTED GAS DETECTION  
A system includes a plurality of optical resonators, a light source, an optical fiber that couples the plurality of optical resonators to the light source, and a detector that is coupled to the...
US20120050743 Apparatus of absorption spectroscopy for gaseous samples  
An absorption spectroscopy apparatus provides an apparatus for analyzing gaseous sample. A measuring section irradiates the gaseous sample with terahertz radiation. An analysis section calculates...
US20160238528 OPTOPAIRS WITH TEMPERATURE COMPENSABLE ELECTROLUMINESCENCE FOR USE IN OPTICAL GAS ABSORPTION ANALYZERS  
Optopair for use in sensors and analyzers of gases such as methane, and a fabrication method therefor is disclosed. It comprises: a) an LED, either cascaded or not, having at least one radiation...
US20120075632 APPARATUS AND METHOD FOR MEASURING SO3 AND H2SO4 CONCENTRATIONS IN GASES  
The invention relates to an apparatus for the continuous measurement of SO3 and/or H2SO4 concentrations in gases using a photometer having a light source, a cuvette, a receiver, an optical filter...
US20090124918 Apparatus For Spectroscopically Analyzing A Gas  
The invention relates to an apparatus for spectroscopically analysing a gas, said apparatus having at least one radiation source (1), at least one detection apparatus (12; 20), at least one sample...
US20140233034 APPARATUS AND METHOD FOR ON-LINE, REAL-TIME ANALYSIS OF CHEMICAL GASSES DISSOLVED IN TRANSFORMER OIL  
A method of providing real-time analysis of chemical gases in a transformer oil has been disclosed. The method includes the steps of providing an inspection probe adapted to measure a transmission...
US20100242572 WAVELENGTH MODULATION SPECTROSCOPY FOR SIMULTANEOUS MEASUREMENT OF TWO OR MORE GAS INGREDIENTS  
Methods and systems to measure simultaneously concentrations or concentration ratio(s) of two or more gas ingredients in a sample area comprising: a wavelength modulated light source; an acoustic...
US20070252995 Cavity Ring-Down Sensing Apparatus and Methods  
We describe an evanescent wave cavity-based optical sensor. The sensor comprises an optical cavity including a reflection from one or more totally internally reflecting (TIR) surfaces generating...
US20130058830 SENSOR SYSTEM USING A HOLLOW WAVEGUIDE  
The present application provides a method for determining one or two parameters of a sensor system for detecting a gaseous sample. The sensor system comprises a light source to generate a light...
US20100002235 LASER DIODE ARRANGEMENTS AND METHOD FOR GAS DETECTION  
A gas detection laser diode device and gas detection unit including the gas detection laser diode device having a hermetically sealed housing with electrical connectors at the bottom and a window,...
US20090284745 GAS CELL USING TWO PARABOLIC CONCAVE MIRRORS AND METHOD OF PRODUCING GAS SENSOR USING THE SAME  
Disclosed are an optical cavity and a gas cell fabricated by using the same. The optical cavity is the most important element of the gas cell, which measures density of gas using light absorption...
US20080158563 Sensors  
A gas sensor for hydrogen or other gases, especially flammable or explosive gases, has a plasmon-polariton waveguide comprising a metal strip on a membrane supported by a substrate in an...
US20050162655 Method and apparatus for monitoring trace constituents in a fluid  
An apparatus for remote detection of selected trace constituents in a fluid, for example flue gases from a stack, has a laser for generating a laser beam. The laser beam is transmitted through the...
US20070097371 LASER SENSING APPARATUS AND METHOD  
An apparatus for eliminating speckle noise from retro reflectors. A polyethylene film is introduced in an optical path between a retro reflector and a radiation receiver to reduce coherence length...
US20110184624 GAS DETECTION DEVICE  
The present invention relates to a gas detection device (200) comprising a laser sensor unit (100). The laser sensor unit (100) is adapted to emit laser light being adapted to be at least...
US20090303486 LIGHT SOURCE AND GAS MEASURING DEVICE  
A light source is provided that realizes a single spectral linewidth having a half value width of 1 MHz or less and that is not influenced by the ambient temperature. A light source includes first...
US20050062972 System and method for cavity ring-down spectroscopy using continuously varying continuous wave excitation  
An apparatus and method for determining the presence of a trace species in a sample gas contained in a resonant cavity. The apparatus comprises at least one light source for generating radiation;...
US20090316139 BIODIESEL/DIESEL BLEND LEVEL DETECTION USING ABSORBANCE  
Described herein are embodiments of a method and device for determining the relative amounts of biodiesel and diesel in a biodiesel/diesel blend without separating the biodiesel from the diesel....
US20090128820 OPTICAL SYSTEM AND ATOMIC OSCILLATOR BACKGROUND  
An optical system of an atomic oscillator includes: a coherent light source emitting two resonant light components each having a p-polarized light component and an s-polarized light component, the...

Matches 1 - 50 out of 75 1 2 >