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    METHOD FOR ANALYZING OPTICAL ISOMERS AND ION MOBILITY ANALYZER
    66.
    发明申请
    METHOD FOR ANALYZING OPTICAL ISOMERS AND ION MOBILITY ANALYZER 审中-公开

    公开(公告)号：US20190066992A1

    公开(公告)日：2019-02-28

    申请号：US16108182

    申请日：2018-08-22

    申请人： SHIMADZU CORPORATION

    发明人： Yoshinori ARITA ,  Osamu FURUHASHI

    IPC分类号： H01J49/06 ,  G01N27/62

    CPC分类号： H01J49/06 ,  G01N21/19 ,  G01N27/622

    摘要： The existence ratio of optical isomers (D-form, L-form) is easily measured.Counterclockwise or clockwise circularly polarized light is applied from a light application unit 6 to ions which are derived from a target compound and are drifting in a drift region 3. The ions absorb light, and a collision cross-section of the ions thus changes, whereby the mobility also changes. Each of the D-form and the L-form has a light absorption rate which is different between counterclockwise circularly polarized light and clockwise circularly polarized light. Therefore, each light absorption rate is examined in advance, and an existence ratio of the D-form and the L-form is calculated, based on the two intensity ratios each of which is the ratio of a peak of the ions having absorbed no light and a peak of the ions having absorbed light, which peaks appear on a drift time spectrum, and based on the light absorption rates of the D-form and the L-form.

    MITIGATING MENISCUS EFFECTS IN VERTICALLY ORIENTED CIRCULAR DICHROISM SPECTROMETERY
    67.
    发明申请
    MITIGATING MENISCUS EFFECTS IN VERTICALLY ORIENTED CIRCULAR DICHROISM SPECTROMETERY 审中-公开

    公开(公告)号：US20180283948A1

    公开(公告)日：2018-10-04

    申请号：US15765698

    申请日：2016-10-06

    申请人： Hinds Instruments, Inc.

    发明人： Baoliang Wang

    IPC分类号： G01J3/447 ,  G01J4/04 ,  G01N21/19 ,  G01N21/21 ,  G01N21/25

    CPC分类号： G01J3/447 ,  G01J3/0205 ,  G01J3/0224 ,  G01J4/04 ,  G01J2004/001 ,  G01N21/19 ,  G01N21/21 ,  G01N21/253 ,  G01N2021/216

    摘要： Example embodiments of methods, apparatus, and systems for measuring polarimetric parameters using spectroscopy are disclosed herein. Particular embodiments concern circular dichroism (CD) spectrometers that use a vertically aligned beam. In such embodiments, the solution being analyzed may have a top surface that forms a convex or concave meniscus, creating a surface through which the measuring beam passes that may refract the beam in undesirable ways. Accordingly, particular embodiments of the disclosed technology include one or more meniscus-compensating (meniscus-effect-reducing) components or subsystems. These components and/or subsystems can be used alone or in combination with one another to reduce the undesirable refractive effects caused by the meniscus at the solution's surface, thereby improving the resulting quality of the spectroscopy measurement and potentially improving the speed with which CD spectroscopy can be performed.

    Cavity enhanced polarimeter and related methods
    69.
    发明授权
    Cavity enhanced polarimeter and related methods 有权

    公开(公告)号：US09702812B2

    公开(公告)日：2017-07-11

    申请号：US14706743

    申请日：2015-05-07

    申请人： Theodore Peter Rakitzis

    发明人： Theodore Peter Rakitzis

    IPC分类号： G01N21/19 ,  G01J4/02 ,  G01J4/04 ,  G01N21/21 ,  G01J4/00

    CPC分类号： G01N21/19 ,  G01J4/02 ,  G01J4/04 ,  G01J2004/001 ,  G01N21/21 ,  G01N2201/06113 ,  G01N2201/0636 ,  G01N2201/067

    摘要： A polarimeter for measuring chirality of a material comprising an optical ring cavity comprising a plurality of reflective elements configured to promote bi-directional propagation of a laser beam within the cavity, a laser-emitting device configured to introduce a first input laser beam and a second input laser beam into the ring cavity, and a Faraday rotator and a phase compensator configured to suppress a birefringent background as the first and second laser beams pass through the ring cavity, wherein the plurality of mirrors, Faraday rotator, and phase compensator are configured such that light from the first and second laser beams passes through a chiral material located within the cavity a sufficient number of times for a measurement of optical rotary dispersion (ORD) and circular dichroism (CD) of light transmitted through the chiral material to be obtained. Particular implementations include monolithic ring cavities or microresonators or use of intra-cavity gain media.

    CIRCULAR DICHROISM MEASURING METHOD AND CIRCULAR DICHROISM MEASURING DEVICE
    70.
    发明申请
    CIRCULAR DICHROISM MEASURING METHOD AND CIRCULAR DICHROISM MEASURING DEVICE 审中-公开

    公开(公告)号：US20170191928A1

    公开(公告)日：2017-07-06

    申请号：US15315433

    申请日：2015-05-18

    申请人： HAMAMATSU PHOTONICS K.K.

    发明人： Hiroshi SATOZONO

    IPC分类号： G01N21/19 ,  G01J4/04

    CPC分类号： G01N21/19 ,  G01J4/04 ,  G01N2021/216

    摘要： Circular dichroism can be accurately measured even when a phase modulation element with a distortion component is used.A circular dichroism measuring method using a circular dichroism measuring device 2 includes a step of measuring Ip(t) (S101: phase amount change acquisition step), a step of measuring Is(t) (S102: sample data acquisition step), a step of converting Ip(t) to δ(t) (S103: phase amount change acquisition step), a step of converting Is(t) to Is(δ) (S104: analysis step/Is(δ) calculation step), and a step of performing curve fitting to calculate matrix elements S00, S02, and S03 (S105: analysis step/matrix element calculation step).