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    Absorption Spectrometer
    41.
    发明申请
    Absorption Spectrometer 审中-公开

    公开(公告)号：US20180003624A1

    公开(公告)日：2018-01-04

    申请号：US15537052

    申请日：2015-12-02

    Applicant: Siemens Aktiengesellschaft

    Inventor： Franz STEINBACHER

    IPC: G01N21/3504 ,  G01N21/39 ,  G01J3/10 ,  G01J3/433

    CPC classification number: G01N21/3504 ,  G01J3/108 ,  G01J3/433 ,  G01J3/4338 ,  G01N21/39 ,  G01N2021/399 ,  G01N2201/0612 ,  G01N2201/068

    Abstract: An absorption spectrometer which measures a gas component concentration in a measured gas and which operates via wavelength modulation spectroscopy, wherein the light wavelength of a wavelength-tunable light source is periodically varied over a gas component absorption line of interest and simultaneously sinusoidally modulated with a high frequency and a low amplitude signal, and wherein the measurement signal of a detector is demodulated in a phase-sensitive manner at the frequency and/or a harmonic of the frequency and further analyzed, where modulation starts in each period or each n-th period with the frequency in a time interval before the beginning of the time function and is performed with a higher amplitude than during the time function to demodulate the measurement signal in a phase-synchronous manner, where a device provided for the phase-sensitive demodulation is synchronized during the time interval such that a cable for transmitting synchronization signals is no longer necessary.

    Spectroscopic Apparatus and Method
    42.
    发明申请
    Spectroscopic Apparatus and Method 审中-公开

    公开(公告)号：US20170268930A1

    公开(公告)日：2017-09-21

    申请号：US15532247

    申请日：2015-12-01

    Applicant: Qrometric Limited

    Inventor： Edward Maxwell Hawes ,  Timothy Freegarde ,  Matthew Himsworth

    IPC: G01J3/433 ,  G01J3/40

    CPC classification number: G01J3/4338 ,  G01J3/40

    Abstract: There is described an apparatus (2) for measuring an amount of an analyte in a mixture. In one example, the apparatus (2) has a laser source (6) for generating a frequency-modulated laser beam (22). A cavity (36) receives the frequency-modulated laser beam (22) and a photodetector (46) obtains an intensity signal indicative of an interaction between the frequency-modulated laser beam (22) and the mixture. The apparatus (2) has a first demodulator (76) for producing a first demodulation signal. A frequency locking arrangement uses the first demodulation signal to lock a carrier frequency of the frequency-modulated laser beam (22) and a mode of the cavity (36) to each other. The apparatus has a second demodulator (50) for producing a second demodulation signal and for generating, on the basis of the second demodulation signal, an output indicative of the amount of the analyte in the mixture. Other apparatus and methods are described.

    Filtered ASE swept source for OCT medical imaging
    44.
    发明授权
    Filtered ASE swept source for OCT medical imaging 有权

    公开(公告)号：US09696471B2

    公开(公告)日：2017-07-04

    申请号：US13847616

    申请日：2013-03-20

    Applicant: Axsun Technologies, Inc.

    Inventor： Dale C. Flanders ,  Walid A. Atia ,  Mark E. Kuznetsov

    IPC: G01B9/02 ,  G02B5/22 ,  G01J3/10 ,  G01J3/26 ,  G01N21/47 ,  G01J3/433

    CPC classification number: G02B5/22 ,  G01B9/02004 ,  G01B9/02091 ,  G01J3/10 ,  G01J3/26 ,  G01J3/4338 ,  G01N21/4795

    Abstract: An integrated swept wavelength optical source uses a filtered ASE signal with an optical amplifier and tracking filter. This source comprises a micro optical bench, a source for generating broadband light, a first tunable Fabry Perot filter, installed on the bench, for spectrally filtering the broadband light from the broadband source to generate a narrowband tunable signal, an amplifier, installed on the bench, for amplifying the tunable signal, and a second tunable Fabry Perot filter, installed on the bench, for spectrally filtering the amplified tunable signal from the amplifier. A self-tracking arrangement is also possible where a single tunable filter both generates the narrowband signal and spectrally filters the amplified signal. In some examples, two-stage amplification is provided. The use of a single bench implementation yields a low cost high performance system. For example, polarization control between components is no longer necessary.

    SEGMENTED CHIRPED-PULSE FOURIER TRANSFORM SPECTROSCOPY
    45.
    发明申请
    SEGMENTED CHIRPED-PULSE FOURIER TRANSFORM SPECTROSCOPY 有权

    公开(公告)号：US20170176256A1

    公开(公告)日：2017-06-22

    申请号：US15338851

    申请日：2016-10-31

    Applicant: University of Virginia Patent Foundation

    Inventor： Brooks Hart Pate ,  Justin L. Neill

    IPC: G01J3/443 ,  G01J3/433 ,  G01N21/3586 ,  G01J3/28

    CPC classification number: G01J3/443 ,  G01J3/2889 ,  G01J3/4338 ,  G01J3/453 ,  G01N21/35 ,  G01N21/3586 ,  G01N2021/3595

    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.

    Method and device for determining gas component inside a transparent container
    49.
    发明申请
    Method and device for determining gas component inside a transparent container 审中-公开
    用于确定透明容器内的气体成分的方法和装置

    公开(公告)号：US20160334331A1

    公开(公告)日：2016-11-17

    申请号：US15111824

    申请日：2015-01-14

    Applicant: OY SPARKLIKE AB

    Inventor： Kai Niiranen ,  Miikkael Niemi ,  Mikko Syrjälahti

    IPC: G01N21/39 ,  G01J3/433

    CPC classification number: G01N21/39 ,  G01J3/433 ,  G01J3/4338 ,  G01N21/274 ,  G01N2021/399

    Abstract: A device for non-invasively determining existence of a gas component of interest inside a determination space of a glass unit comprises a laser beam emitting unit comprising a laser source for emitting laser beam towards said measuring space and detecting unit comprising a detector for detecting transmission of said emitted laser beams travelled through said space. The device is configured to measure in a calibration mode locations of at least one reference peak of at least same gas component as to the determined inside the determination space. The emitted laser beam is configured to travel through a calibration space having at least the gas component of interest, and the detecting means is configured essentially to detect or image said beam transmitted through said calibration space. The device is also configured to be moved so to receive said determination space between the laser beam emitting unit and detecting unit for a determining purpose of the existence of the interest gas component inside said determination space.

    Abstract translation: 用于非侵入性地确定玻璃单元的确定空间内的感兴趣的气体成分的存在的装置包括：激光束发射单元，包括用于朝向所述测量空间发射激光束的激光源;以及检测单元，所述检测单元包括检测器， 所述发射的激光束穿过所述空间。 该装置被配置为在校准模式中测量与确定空间内确定的至少相同气体成分的至少一个参考峰的位置。 发射的激光束被配置成行进通过至少具有感兴趣的气体分量的校准空间，并且检测装置基本上被配置为检测或成像透过所述校准空间的所述光束。 该装置还被配置为移动以便在激光束发射单元和检测单元之间接收所述确定空间，以确定在所述确定空间内存在感兴趣气体成分的确定目的。

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