公开(公告)号：US20180038781A1

公开(公告)日：2018-02-08

申请号：US15555376

申请日：2016-03-04

Applicant: RION Co., Ltd.

Inventor： Tomonobu MATSUDA ,  Masaki SHIMMURA ,  Yuki YAMAKAWA

IPC: G01N15/02 ,  G01N15/14 ,  G01N21/45 ,  G01N15/06

CPC classification number: G01N15/0205 ,  G01N15/06 ,  G01N15/1434 ,  G01N15/1459 ,  G01N21/45 ,  G01N2015/0011 ,  G01N2015/0038 ,  G01N2015/0053 ,  G01N2015/1445 ,  G01N2015/1454 ,  G01N2015/1486 ,  G01N2015/1493

Abstract: An irradiation optical system 12 irradiates a fluid flowing in a flow passage 2a with one light among a plurality of lights obtained by branching light from a light source 1 and forms the detection area. A detection optical system 13 makes scattered light with a different direction from an optical axis of the irradiation optical system enter a beam splitter 17 among the scattered lights from particles contained in the fluid in this detection area. Meanwhile, a beam expander 16 makes another light among the plurality of lights enter the beam splitter 17 as reference light. A detector 4 receives an interference light, by the scattered light and the reference light, obtained by the beam splitter 17 by light receiving elements and generates a detection signal corresponding to the interference light. A counting unit 6 counts the particles based on this detection signal.

公开(公告)号：US20190162645A1

公开(公告)日：2019-05-30

申请号：US16200511

申请日：2018-11-26

Applicant: RION Co., Ltd.

Inventor： Mitsuaki SAITOU ,  Masaki SHIMMURA ,  Tomonobu MATSUDA ,  Yuki YAMAKAWA

IPC: G01N15/14

CPC classification number: G01N15/1429 ,  G01N15/0211 ,  G01N15/1434 ,  G01N15/1459 ,  G01N2015/1454 ,  G01N2015/1486 ,  G01N2015/1493

Abstract: A particle counter provided with: a detector configured to receive interference light by scattered light and reference light with a light receiving element, and generate a detection signal corresponding to the interference light; a filter configured to perform, with respect to the detection signal generated by the detector, a filtering process for passing a frequency component corresponding to an intensity change of the interference light; a determination unit configured to determine, from a peak level of the detection signal before filtering and a peak level of the detection signal after filtering, whether the detection signal is due to a particle; and a counting unit configured to perform, if it is determined by the determination unit that the detection signal is due to the particle, particle counting based on the detection signal after filtering.

公开(公告)号：US20170160178A1

公开(公告)日：2017-06-08

申请号：US15365096

申请日：2016-11-30

Applicant: RION CO., LTD.

Inventor： Tomonobu MATSUDA ,  Masaki SHIMMURA ,  Mitsuaki SAITOU ,  Yuki YAMAKAWA

IPC: G01N15/06 ,  G01B9/02

CPC classification number: G01N15/06 ,  G01B9/02024 ,  G01B9/02038 ,  G01N15/0211 ,  G01N15/1434 ,  G01N15/1459 ,  G01N2015/0687 ,  G01N2015/0693 ,  G01N2015/1454 ,  G01N2015/1486

Abstract: Provided is a particle counter including: a light source; a light superimposition unit configured to superimpose light beams; an irradiation optical system configured to irradiate a fluid in a flow passage with one of a plurality of light beams from the light source; a detection optical system configured to make a part of scattered light beams by a particle in the fluid enter the light superimposition unit; a reference optical system configured to split another one of the plurality of light beams into a plurality of reference light beams and makes the reference light beams enter the light superimposition unit; and a counting unit configured to count the particles on the basis of detection signals corresponding to an interference light beam received by a light receiver. The interference light beam is generated by interference between the scattered light beam and one of the reference light beams at the light superimposition unit, and is received by the light receiver corresponding to the reference light beam.

公开(公告)号：US20210199558A1

公开(公告)日：2021-07-01

申请号：US17133920

申请日：2020-12-24

Applicant: RION CO., LTD.

Inventor： Hiroaki YAGUCHI ,  Yuki YAMAKAWA ,  Masaki SHIMMURA ,  Tomonobu MATSUDA

IPC: G01N15/14

Abstract: A flow cell includes a body and a flow channel. The body is formed out of blocks made of an uniaxial crystal material and joined to one another. The flow channel is formed inside the body, so that the flow cell is configured to be used to measure particles passing through the flow channel based on reception of scattered light generated from the particles. A crystallographic c-axis in a predetermined part of the body is configured to being substantially perpendicular to both a receiving direction and a polarization direction of the scattered light.

公开(公告)号：US20190277745A1

公开(公告)日：2019-09-12

申请号：US16290788

申请日：2019-03-01

Applicant: RION Co., Ltd.

Inventor： Tomonobu MATSUDA ,  Masaki SHIMMURA ,  Mitsuaki SAITOU ,  Yuki YAMAKAWA

IPC: G01N15/14 ,  G01N15/02 ,  G01N15/06

Abstract: A particle counter includes a detector that receives, using a light receiving element, interference light between scattered light and reference light, generates a detection signal corresponding to the interference light, and amplifies the detection signal using an amplifier; a counting unit that performs counting of the particle, based on the detection signal in a measurement period for measuring particle; and an optical path length variable unit that causes the optical path length of at least one of a first optical path and a second optical path to be changed at a predetermined rate, wherein the predetermined rate is set based on a flow velocity of the fluid so as to slow a change in a phase difference between the scattered light and the reference light and to make the frequency of the detection signal lower by changing the optical path length.