公开(公告)号：US11879833B2

公开(公告)日：2024-01-23

申请号：US17439480

申请日：2019-07-17

Applicant: JASCO CORPORATION

Inventor： Yuichi Miyoshi ,  Yoshiro Kondo

IPC: G01N21/19 ,  G01J4/04 ,  G01N21/21

CPC classification number: G01N21/19 ,  G01J4/04 ,  G01N2021/216

Abstract: A circular dichroism measurement device includes: a sample part having a sample; a PEM that modulates a polarization state of an incoming light to the sample part or an outgoing light from the sample part; a photo detector that detects a change in a light intensity of the outgoing light from the sample part; an amplifier that amplifies a detection signal from the photo detector; an A/D converter that converts the detection signal amplified by the amplifier to a digital signal; and a digital processing device that executes a signal processing to the digital signal from the A/D converter to acquire a measurement value of circular dichroism of the sample. The A/D converter is configured to convert the detection signal, that is amplified in a state of containing the AC component and the DC component of the light intensity that changes with the same frequency as the modulation frequency of PEM.

公开(公告)号：US10564035B2

公开(公告)日：2020-02-18

申请号：US15968307

申请日：2018-05-01

Applicant: JASCO Corporation

Inventor： Yoshiro Kondo ,  Koshi Nagamori

IPC: G01J3/44 ,  G01J3/28 ,  G01N21/64 ,  G01N21/27 ,  G01N21/19 ,  G01J3/12 ,  G01J3/02 ,  G01J3/42

Abstract: The present invention relates to improvement in accuracy in a device and a method for determining whether a spectrum of a target sample coincide with a standard spectrum or not.A spectrum determination device 10 determines whether a sample spectrum coincides with a reference spectrum or not by the reference spectrum obtained from a spectrum group. The spectrum determination device 10 comprises a storage unit 26 for storing the reference spectrum, and a determination unit 28 for comparing the reference spectrum and the sample spectrum to determine a sample 20 from the comparison result. The reference spectrum is set with a differing weighting for each point. The determination unit 28 calculates an individual coincidence with the sample spectrum for each point of the reference spectrum, and calculates a coincidence of the sample spectrum with the reference spectrum by the individual coincidence and the differing weighting to determine the sample 20.