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公开(公告)号：US20140285802A1
公开(公告)日：2014-09-25
申请号：US14072331
申请日：2013-11-05
Applicant: Rion Co., Ltd.
Inventor： Masaki SHIMMURA , Takehiro IMAI , Takuya TABUCHI
IPC: G01N15/02
CPC classification number: G01N15/0211 , G01N15/1429 , G01N15/1459 , G01N2015/0238 , G01N2015/1486
Abstract: [Subject]To offer a light scattering particle counter that improves the SN ratio by sufficiently attenuating the high frequency noise component while suppressing the attenuation of the signal component.[Means for Solving the Problems]A light scattering particle counter which irradiates a laser beam La to a sample fluid and forms a particle detection area 13, a multi-channel light detecting element receives scattered light Ls from a particle passing through the particle detection area and detects the particle, the time constants τc, τm, τe of the low pass filters F1, F2, F3, F4, F5 are set depending on the beam diameter of the laser beam La and the flow velocity of the fluid which flows through each divided area.
Abstract translation: [主题]提供一种光散射粒子计数器，通过在抑制信号分量的衰减的同时充分衰减高频噪声分量来提高SN比。 解决问题的手段一种将激光束La照射到样品流体并形成粒子检测区域13的光散射粒子计数器，多通道光检测元件从通过粒子检测区域的粒子接收散射光Ls 并检测出粒子，根据激光束La的光束直径和流过各个光束的流体的流速，设定低通滤光片F1，F2，F3，F4，F5的时间常数τc，τm，τe 分区。
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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.
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Patent Agency Ranking
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
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.
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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
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.
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公开(公告)号：US20160091407A1
公开(公告)日：2016-03-31
申请号：US14859780
申请日：2015-09-21
Applicant: RION CO., LTD.
Inventor： Takashi MINAKAMI , Masaki SHIMMURA , Tomonobu MATSUDA
CPC classification number: G01N21/53 , G01N15/1459 , G01N2015/0053 , G01N2015/1486 , G01N2021/0392 , G01N2021/513
Abstract: A particle counter for chemical solution in this disclosure uses a flow cell through which a chemical solution including particles flows, a laser light, and a light-receiving element array. Scattered light from the particles passing through a detection region on an optical path of the laser light in the flow cell is condensed to the light-receiving element array. The laser light in the center of the detection region has an energy density of 3×108 mW/cm2 or more. Each of plural light-receiving elements (a) is larger in length and width than a spot diameter of the scattered light, and (b) receives the scattered light from a region with a size of 760 μm2 or less included in the detection region. The signal processing unit counts the particles passing through the detection region by use of a threshold corresponding to the smallest measurable particle size of 0.03 μm.
Abstract translation: 本公开的化学溶液的颗粒计数器使用流动池，包括颗粒的化学溶液流过该流动池，激光和受光元件阵列。 来自通过流通池中的激光的光路上的检测区域的颗粒的散射光被聚光到受光元件阵列。 检测区域的中心的激光的能量密度为3×108mW / cm 2以上。 多个光接收元件（a）中的每一个的长度和宽度比散射光的光斑直径大，并且（b）接收来自检测区域中包括的尺寸为760μm2以下的区域的散射光。 信号处理单元通过使用对应于最小可测量粒径为0.03μm的阈值对通过检测区域的颗粒进行计数。
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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.
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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
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.
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