公开(公告)号：US20240142360A1

公开(公告)日：2024-05-02

申请号：US18280497

申请日：2022-03-24

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuhiro TAKAHASHI ,  Kouichiro AKIYAMA ,  Hiroshi SATOZONO

IPC: G01N15/04 ,  G01N15/00

CPC classification number: G01N15/042 ,  G01N2015/0053 ,  G01N2015/045

Abstract: A dispersion stability evaluation method is a method for evaluating a dispersion stability of dispersoid dispersed in a dispersion medium. The dispersion stability evaluation method includes a first step of holding a sample including the dispersion medium and the dispersoid on a reflective surface, and a second step of causing terahertz waves to be incident on the reflective surface from a side opposite to the sample and detecting the terahertz waves reflected by the reflective surface. In the second step, while a state where the dispersoid are allowed to move toward the reflective surface is maintained, a plurality of detection results respectively corresponding to a plurality of times apart from each other are acquired.

公开(公告)号：US20240418641A1

公开(公告)日：2024-12-19

申请号：US18703413

申请日：2022-10-26

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuhiro TAKAHASHI ,  Kouichiro AKIYAMA ,  Hiroshi SATOZONO

IPC: G01N21/3581 ,  G01N21/3563

Abstract: A crystal form determination method includes a first process of preparing a measurement target object; a second process of entering a terahertz wave to the measurement target object and detecting the terahertz wave from the measurement target object to acquire a plurality of detection results corresponding to a plurality of times separated from each other; and a third process of determining a type of crystal form contained in the measurement target object. In the third process, when a frequency characteristic having a third peak at a third frequency different from a first frequency related to a first peak corresponding to an anhydride and a second frequency related to a second peak corresponding to a hydrate exists among the plurality of frequency characteristics, determination is made that the crystal form different from the anhydride and the hydrate is contained in the measurement target object.

公开(公告)号：US20220091027A1

公开(公告)日：2022-03-24

申请号：US17474338

申请日：2021-09-14

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Kazuhiro TAKAHASHI ,  Kouichiro AKIYAMA ,  Hiroshi SATOZONO

IPC: G01N21/3563 ,  G01N21/552

Abstract: A terahertz wave attenuated total reflection spectroscopic method, includes: a first step of disposing a measurement target of which a volume is changed during a measurement period on a reflection surface; and a second step of acquiring data including a plurality of detection results respectively corresponding to a plurality of times separated from each other during the measurement period by allowing a terahertz wave to be incident on the reflection surface from a side opposite to the measurement target and by detecting the terahertz wave reflected on the reflection surface, during the measurement period. In the second step, a state in which a substantially constant pressure is applied to the measurement target disposed on the reflection surface is maintained during the measurement period.