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公开(公告)号：US20200300770A1
公开(公告)日：2020-09-24
申请号：US16946054
申请日：2020-06-04
Inventor： Peidong Wang , Rong SUN , Brendan FALVEY , Haowen LI , Yu SHEN , Michael DUGAS
Abstract: An embodiment of a laser induced breakdown system is described that comprises a portable device that includes: a laser configured to produce a beam comprising a plurality of repeating pulses; a processor configured to open a data acquisition window after a delay period, wherein the delay period begins upon production of one of the pulses; one or more optical elements configured to direct the beam at a sample and collect emitted light from a plasma continuum; and an optical detector configured to produce a plurality of signal values from the emitted light from the plasma continuum collected during the data acquisition window, wherein the processor is configured to identify an element from the signal values.
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公开(公告)号：US20170023484A1
公开(公告)日：2017-01-26
申请号：US15213512
申请日：2016-07-19
Inventor： Peidong WANG , Rong SUN , Brendan FALVEY , Haowen LI , Yu SHEN , Michael E. DUGAS
Abstract: An embodiment of a laser induced breakdown system is described that comprises a portable device that includes: a laser configured to produce a beam comprising a plurality of repeating pulses; a processor configured to open a data acquisition window after a delay period, wherein the delay period begins upon production of one of the pulses; one or more optical elements configured to direct the beam at a sample and collect emitted light from a plasma continuum; and an optical detector configured to produce a plurality of signal values from the emitted light from the plasma continuum collected during the data acquisition window, wherein the processor is configured to identify an element from the signal values.
Abstract translation: 描述了激光诱导击穿系统的实施例，其包括便携式设备，其包括：激光器，被配置为产生包括多个重复脉冲的光束; 处理器，被配置为在延迟周期之后打开数据采集窗口，其中所述延迟周期在生成所述脉冲之一时开始; 一个或多个光学元件，被配置为将光束引导到样品并收集来自等离子体连续体的发射光; 以及光学检测器，被配置为从在数据采集窗口期间收集的等离子体连续体的发射光产生多个信号值，其中处理器被配置为根据信号值识别元件。
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公开(公告)号：US20190310201A1
公开(公告)日：2019-10-10
申请号：US16421888
申请日：2019-05-24
Inventor： Peidong WANG , Rong SUN , Brendan FALVEY , Haowen LI , Yu SHEN , Michael E. DUGAS
Abstract: An embodiment of a laser induced breakdown system is described that comprises a portable device that includes: a laser configured to produce a beam comprising a plurality of repeating pulses; a processor configured to open a data acquisition window after a delay period, wherein the delay period begins upon production of one of the pulses; one or more optical elements configured to direct the beam at a sample and collect emitted light from a plasma continuum; and an optical detector configured to produce a plurality of signal values from the emitted light from the plasma continuum collected during the data acquisition window, wherein the processor is configured to identify an element from the signal values.
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公开(公告)号：US20160131586A1
公开(公告)日：2016-05-12
申请号：US14996725
申请日：2016-01-15
Inventor： Craig Morris GARDNER , Michael Derek HARGREAVES , Peidong WANG , Yu SHEN
CPC classification number: G01N21/658 , G01J3/44 , G01N21/65 , G01N21/8483 , G01N21/94 , G01N33/9486 , G01N2021/646 , G01N2021/656 , G01N2201/0221 , G01N2201/06113
Abstract: A method of identifying the presence of heroin in an impure heroin composition which contains heroin and at least one fluorescent contaminant which interferes with a Raman signal from the heroin. The method may include contacting the mixture with a solvent such as an alcohol, then contacting the resulting alcohol composition with a SERS surface. The surface may then be exposed to laser light from a hand-held Raman spectrometer to detect a Raman signal from the heroin. An apparatus for performing the method is also provided.
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