公开(公告)号：US20240077399A1

公开(公告)日：2024-03-07

申请号：US18509253

申请日：2023-11-14

Applicant: FUJIFILM Corporation

Inventor： Sohichiro NAKAMURA ,  Kenichi HAMADA

IPC: G01N15/02

CPC classification number: G01N15/0205

Abstract: Provided are a light scattering measurement device and a light scattering measurement method that specify a material of a particle included in a dispersion liquid including at least one type of particles. The light scattering measurement device includes a light source unit that irradiates the dispersion liquid including at least one type of particles with measurement light, a parameter setting unit that sets at least one of a scattering angle or a measurement wavelength as a measurement parameter, a scattered light measurement unit that obtains a plurality of pieces of scattering intensity data by measuring a scattering intensity of scattered light emitted from the dispersion liquid by the measurement light a plurality of times while changing a value of the measurement parameter a plurality of times, and a calculation unit that calculates scattering intensity time variation characteristic data and scattering intensity parameter-dependent data from the scattering intensity data, and specifies a material of each type of particle of the particles of the dispersion liquid specified by fitting the scattering intensity time variation characteristic data and the scattering intensity parameter-dependent data using a theoretical formula or a simulation based on a theory of electromagnetic wave behavior that defines a relationship of a refractive index, a particle diameter, and the scattering intensity.

公开(公告)号：US20230375455A1

公开(公告)日：2023-11-23

申请号：US18361890

申请日：2023-07-30

Applicant: FUJIFILM Corporation

Inventor： Kenichi HAMADA ,  Sohichiro NAKAMURA

IPC: G01N15/02

CPC classification number: G01N15/0211 ,  G01N2015/0222

Abstract: Provided are a dynamic light scattering measurement method and a dynamic light scattering measurement device with which a particle size distribution of each type of particle included in a dispersion liquid including particles is obtained. A dynamic light scattering measurement method for a dispersion liquid including a plurality of types of particles includes a measurement step of measuring a scattering intensity of the dispersion liquid a plurality of times to obtain a plurality of pieces of scattering intensity data while changing a value of any one of at least a scattering angle or a measurement wavelength among measurement parameters, a calculation step of calculating a plurality of pieces of scattering intensity time variation characteristic data and a plurality of scattering intensity parameter-dependent data from the plurality of pieces of scattering intensity data obtained by the measurement step, and a step of obtaining a particle size distribution of each type of particle of a plurality of types of particles by fitting the plurality of pieces of scattering intensity time variation characteristic data and the plurality of pieces of scattering intensity parameter-dependent data, which are obtained by the calculation step, with respect to a theoretical formula that defines a relationship between a particle diameter and the scattering intensity.

公开(公告)号：US20230375453A1

公开(公告)日：2023-11-23

申请号：US18361895

申请日：2023-07-30

Applicant: FUJIFILM Corporation

Inventor： Sohichiro NAKAMURA ,  Kenichi HAMADA

IPC: G01N15/02

CPC classification number: G01N15/0205

Abstract: Provided is an optical measurement device capable of easily measuring a scattering intensity at different scattering angles or different wavelengths. An optical measurement device with a low-coherence interferometer includes a detection unit having at least one of a first detection unit that detects an interference light intensity per wavelength by means of interference between at least a part of scattered light obtained by allowing incident light to be incident on a dispersion liquid including particles and reference light or a second detection unit that detects an interference light intensity per scattering angle by means of interference between at least a part of the scattered light obtained by allowing the incident light to be incident on the dispersion liquid including the particles and the reference light, and a conversion unit extracts a scattering intensity at a specific depth and a specific wavelength of the dispersion liquid from data of the interference light intensity per wavelength detected by the first detection unit or a scattering intensity at a specific depth and a specific scattering angle of the dispersion liquid from data of the interference light intensity per scattering angle detected by the second detection unit and converts data of the extracted scattering intensity into time fluctuation data of the scattered light at the specific depth of the dispersion liquid.