公开(公告)号：US10670518B2

公开(公告)日：2020-06-02

申请号：US16028531

申请日：2018-07-06

Applicant: SHIMADZU CORPORATION

Inventor： Daijiro Kato ,  Shinya Wakuda

IPC: G01N21/35 ,  G01J3/45 ,  G01J3/28 ,  G01J3/453

Abstract: The Fourier transform infrared spectrophotometer includes: a light source 11 for generating infrared light having a wavelength width including an absorption wavelength of a compound to be analyzed; an interferometer including a fixed mirror 15 and a movable mirror 16, for generating interfering light from the infrared light; a detector 25 for generating a voltage with a magnitude corresponding to the intensity of the interfering light, and for outputting a voltage obtained by subtracting, from the aforementioned voltage, a voltage with a predetermined magnitude; a high-pass filter 464 for allowing the passage of frequency components equal to or higher than a predetermined frequency in an output voltage from the detector 25; an amplifier 463 for amplifying an output voltage from the high-pass filter 464 by a predetermined multiplying factor; and an analogue-to-digital converter 27 for converting an output voltage from the amplifier 463 into a digital signal.

公开(公告)号：US20190011357A1

公开(公告)日：2019-01-10

申请号：US16028531

申请日：2018-07-06

Applicant: SHIMADZU CORPORATION

Inventor： Daijiro Kato ,  Shinya Wakuda

IPC: G01N21/35 ,  G01J3/45

CPC classification number: G01N21/35 ,  G01J3/28 ,  G01J3/45 ,  G01J3/4535 ,  G01J2003/4538 ,  G01N2021/3595

Abstract: The Fourier transform infrared spectrophotometer includes: a light source 11 for generating infrared light having a wavelength width including an absorption wavelength of a compound to be analyzed; an interferometer including a fixed mirror 15 and a movable mirror 16, for generating interfering light from the infrared light; a detector 25 for generating a voltage with a magnitude corresponding to the intensity of the interfering light, and for outputting a voltage obtained by subtracting, from the aforementioned voltage, a voltage with a predetermined magnitude; a high-pass filter 464 for allowing the passage of frequency components equal to or higher than a predetermined frequency in an output voltage from the detector 25; an amplifier 463 for amplifying an output voltage from the high-pass filter 464 by a predetermined multiplying factor; and an analogue-to-digital converter 27 for converting an output voltage from the amplifier 463 into a digital signal.