MULTI-MODE PLASMA-BASED OPTICAL EMISSION GAS DETECTOR

    公开(公告)号:US20180038800A1

    公开(公告)日:2018-02-08

    申请号:US15555620

    申请日:2016-03-02

    Inventor: Yves Gamache

    CPC classification number: G01N21/67 G01J3/443 G01N21/01 G01N2201/023

    Abstract: A plasma-based detector using optical spectroscopic techniques for analysing the constituents of gas samples are provided. The detector includes a plasma-generating mechanism and a plasma-localizing mechanism. Electron-injecting electrodes may be provided in the plasma chamber of the detector. A Pressure control mechanism as well as a doping module may optionally be included. In accordance with some implementations, the collection, detection and analysis of light extracted from the plasma may enable one or more of various operation modes, such as an emission mode, an absorption mode, and indirect detection mode or a constant emission mode.

    OPTICAL EMISSION SYSTEM INCLUDING DICHROIC BEAM COMBINER

    公开(公告)号:US20170343414A1

    公开(公告)日:2017-11-30

    申请号:US15679969

    申请日:2017-08-17

    Abstract: An optical emission spectrometer system includes a light source and a dichroic beam combiner. The light source emits first light in a first direction and second light in a second direction different from the first direction. The dichroic beam combiner receives the first light via a first light path and the second light via a second light path, reflects a portion the first light into an entrance aperture of a light detection and measurement apparatus, and transmits a portion of the second light into the entrance aperture, enabling analysis and measurement of both first and second light characteristics simultaneously. The portion of the first light reflected into the entrance aperture predominately has wavelengths in a first range of wavelengths and the portion of the second light transmitted into the entrance aperture predominately has wavelengths in a second range of wavelengths, different from the first range of wavelengths.

    Segmented chirped-pulse Fourier transform spectroscopy

    公开(公告)号:US09778112B2

    公开(公告)日:2017-10-03

    申请号:US15338851

    申请日:2016-10-31

    Abstract: An emission can be obtained from a sample in response to excitation using a specified range of excitation frequencies. Such excitation can include generating a specified chirped waveform and a specified downconversion local oscillator (LO) frequency using a digital-to-analog converter (DAC), upconverting the chirped waveform via mixing the chirped waveform with a specified upconversion LO frequency, frequency multiplying the upconverted chirped waveform to provide a chirped excitation signal for exciting the sample, receiving an emission from sample, the emission elicited at least in part by the chirped excitation signal, and downconverting the received emission via mixing the received emission with a signal based on the specified downconversion LO signal to provide a downconverted emission signal within the bandwidth of an analog-to-digital converter (ADC). The specified chirped waveform can include a first chirped waveform during a first duration, and a second chirped waveform during a second duration.

    Optical emission system including dichroic beam combiner

    公开(公告)号:US09752933B2

    公开(公告)日:2017-09-05

    申请号:US14614381

    申请日:2015-02-04

    Abstract: An optical emission spectrometer system includes a light source and a dichroic beam combiner. The light source emits first light in a first direction and second light in a second direction different from the first direction. The dichroic beam combiner receives the first light via a first light path and the second light via a second light path, reflects a portion the first light into an entrance aperture of a light detection and measurement apparatus, and transmits a portion of the second light into the entrance aperture, enabling analysis and measurement of both first and second light characteristics simultaneously. The portion of the first light reflected into the entrance aperture predominately has wavelengths in a first range of wavelengths and the portion of the second light transmitted into the entrance aperture predominately has wavelengths in a second range of wavelengths, different from the first range of wavelengths.

    OPTICAL MEASUREMENT DEVICE AND OPTICAL MEASUREMENT METHOD

    公开(公告)号:US20170212047A1

    公开(公告)日:2017-07-27

    申请号:US15312771

    申请日:2015-04-07

    CPC classification number: G01N21/64 G01J3/0254 G01J3/443 G01N2201/12753

    Abstract: An optical measurement device inputs excitation light to an integrating sphere in which a sample is disposed, irradiates the sample with the excitation light having a predetermined beam cross-section, detects measurement light output from the integrating sphere by a photodetector, and acquires intensity data of the sample. The optical measurement device includes a storage unit in which correction data is stored and an optical characteristic calculation unit for calculating optical characteristics of the sample based on the intensity data of the sample and the correction data. The correction data is calculated based on first corrective intensity data and second corrective intensity data. The predetermined beam cross-section is covered with the first light absorbing member and covers the second light absorbing member.

    Apparatus for analyzing elements in liquid with controlled amount of gas supply for plasma generation

    公开(公告)号:US09677940B2

    公开(公告)日:2017-06-13

    申请号:US14184233

    申请日:2014-02-19

    CPC classification number: G01J3/443 G01N21/67 G01N21/69

    Abstract: An elemental analysis apparatus 101 includes a treatment vessel 108 of which at least a part is optically transparent, a first electrode 104 covered by insulator 103, a second electrode 102, a bubble-generating part which generates a bubble 106, a gas-supplying apparatus 105 which supplies gas to the bubble-generating part in an amount necessary for generating the bubble 106, a power supply 101 which applies voltage between the first electrode 104 and the second electrode 102, and an optical detection device 110 which determines an emission spectrum of plasma that is generated by application of the voltage, and the apparatus conducts qualitatively or quantitatively analysis of a component contained in the liquid 109 based on the emission spectrum determined by the optical detection device 110.

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