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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：US20150168215A1
公开(公告)日：2015-06-18
申请号：US14629858
申请日：2015-02-24
Inventor： David R. DAY , Malcolm C. SMITH , Peidong WANG
CPC classification number: G01J3/32 , G01J3/0229 , G01J3/0272 , G01J3/44 , G01J3/4412 , G01N21/65 , G01N2201/06113
Abstract: A Raman spectrometer including a laser excitation source, edge filters, and detection optics that direct light into a spectrograph. A spectrograph containing a dispersive element and optics that directs various wavelengths of light onto a segmented diffractive MEMS light modulator array. The MEMS array, depending on actuation state, directs light either to or away from a single detector. Control electronics drive the MEMS light modulator for either sequential wavelength measurement or multiplexed wavelength measurement (Hadamard for example).
Abstract translation: 拉曼光谱仪包括激光源，边缘滤光片以及将光引入光谱仪的检测光学器件。 包含分散元件和光学元件的光谱仪，其将各种波长的光引导到分段的衍射MEMS光调制器阵列上。 取决于致动状态的MEMS阵列将光指向或远离单个检测器。 控制电子驱动MEMS光调制器用于顺序波长测量或多路复用波长测量（例如Hadamard）。
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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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