公开(公告)号：US10982949B2

公开(公告)日：2021-04-20

申请号：US16697180

申请日：2019-11-27

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Kazufumi Nishida ,  Hitoshi Hara ,  Kazuki Setsuda

IPC: G01B11/06 ,  G01N21/27 ,  G01N21/64

Abstract: A measurement apparatus includes a detection unit to detect a first light intensity of a light obtained by making a first light having a first wavelength transmitted through a measurement object, a second light intensity of a light obtained by making a second light having a second wavelength transmitted through the object, the second wavelength having a lower rate of absorption by a material of the object than the first wavelength, and a third light intensity of a light obtained by making a third light having a third wavelength transmitted through the object, the third wavelength having a lower rate of absorption by the material of the object than the first wavelength and having a lower rate of absorption by the object containing a fluid than the second wavelength, and a calculation unit to calculate the thickness of the object by using the first, second, and third light intensities.

公开(公告)号：US11867636B2

公开(公告)日：2024-01-09

申请号：US16984185

申请日：2020-08-04

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Kazuki Setsuda ,  Hitoshi Hara ,  Yasushi Ichizawa

IPC: G01N21/86 ,  G01B11/06 ,  G01N21/3559

CPC classification number: G01N21/86 ,  G01B11/0691 ,  G01N21/3559 ,  G01N2021/869 ,  G01N2021/8618 ,  G01N2021/8663

Abstract: A measurement device to measure a physical quantity of a measurement target having a sheet-like shape is provided, including: a first integrating sphere which is separated by a gap from a first surface of the measurement target, has a first opening facing the first surface, and is not provided with a light detector to detect an intensity of light; a second integrating sphere which is separated by a gap from a second surface of the measurement target, where the second surface is positioned opposite to the first surface, and has a second opening facing the first opening with the measurement target sandwiched therebetween; a light source to emit light into the first integrating sphere; a light detecting unit to detect an intensity of light inside the second integrating sphere; and a calculating unit to calculate the physical quantity of the measurement target based on the intensity of the detected light.

公开(公告)号：US20230062325A1

公开(公告)日：2023-03-02

申请号：US17822661

申请日：2022-08-26

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Kazufumi Nishida ,  Kumiko Horikoshi ,  Hitoshi Hara

IPC: G02B1/18 ,  G02B5/10 ,  G02B5/02

Abstract: An integrating sphere (10) of the present disclosure includes a hollow member (1) and a diffusive coating (4), on the inner surface of the hollow member (1), configured to scatter and reflect light from a light source within the hollow member (1) to yield diffused light. The diffusive coating (4) is coated with a hydrophobic coating (5). The accuracy of optical measurements using the integrating sphere (10) is improved by suppressed moisture absorption of the integrating sphere (10) and suppressed fluctuations in the efficiency of the integrating sphere (10).