JP2019158478A - パーティクルカウンタ - Google Patents
パーティクルカウンタ Download PDFInfo
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- JP2019158478A JP2019158478A JP2018043571A JP2018043571A JP2019158478A JP 2019158478 A JP2019158478 A JP 2019158478A JP 2018043571 A JP2018043571 A JP 2018043571A JP 2018043571 A JP2018043571 A JP 2018043571A JP 2019158478 A JP2019158478 A JP 2019158478A
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- 239000002245 particle Substances 0.000 title claims abstract description 120
- 230000003287 optical effect Effects 0.000 claims abstract description 181
- 238000001514 detection method Methods 0.000 claims abstract description 107
- 239000012530 fluid Substances 0.000 claims abstract description 50
- 238000005259 measurement Methods 0.000 claims abstract description 46
- 230000008859 change Effects 0.000 claims abstract description 34
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 16
- 230000005684 electric field Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 6
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- 230000003247 decreasing effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 230000002238 attenuated effect Effects 0.000 description 2
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- 230000002378 acidificating effect Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N15/1434—Optical arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N15/1456—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals
- G01N15/1459—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals the analysis being performed on a sample stream
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0053—Investigating dispersion of solids in liquids, e.g. trouble
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N15/1434—Optical arrangements
- G01N2015/1454—Optical arrangements using phase shift or interference, e.g. for improving contrast
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N2015/1486—Counting the particles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/14—Optical investigation techniques, e.g. flow cytometry
- G01N2015/1493—Particle size
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
4 検出部
5 フィルタ
6 計数部
11 ビームスプリッタ(光分岐部の一例)
12 照射光学系
13 検出光学系
16 ビームエキスパンダ(参照光学系の一例)
17 ビームスプリッタ(光重畳部の一例)
21a,21b 受光素子
31 光路長可変部
41,42,61〜64,81a,81b,82a,82b,83a,83b 固定反射面
43,44,65〜68,84a,84b 可動反射面
45,69,85 スライダ
Claims (4)
- 光を出射する光源と、
2つの光を空間的に重畳する光重畳部と、
前記光源からの光を分岐して得られる複数の光のうちの第1光を流路内を流れる流体に照射して検出領域を形成する照射光学系と、
前記検出領域内の前記流体に含まれる粒子からの散乱光のうち、前記照射光学系の光軸とは異なる方向の散乱光を、前記光重畳部に入射させる検出光学系と、
前記複数の光のうちの第2光を参照光として前記光重畳部に入射させる参照光学系と、
前記光重畳部によって得られる、前記散乱光と前記参照光との干渉光を受光素子で受光し、前記干渉光に対応する検出信号を生成しアンプで増幅する検出部と、
前記粒子を測定するための測定期間における前記検出信号に基づいて前記粒子の計数を行う計数部と、
前記第1光および前記散乱光の光路である第1光路および前記第2光の光路である第2光路の少なくとも一方の光路長を所定速度で変化させる光路長可変部とを備え、
前記所定速度は、前記流体の流速に基づき、前記光路長を変化させることにより前記散乱光と前記参照光との位相差の変化を遅くし、前記検出信号の周波数を低くするように設定されること、
を特徴とするパーティクルカウンタ。 - 前記光路長可変部は、前記第1光路または前記第2光路に配置される固定反射面と、前記測定期間において、前記光路長が前記所定速度で変化するように可動反射面を配置して、前記可動反射面を移動させるスライダとを備えることを特徴とする請求項1記載のパーティクルカウンタ。
- 前記スライダは、前記測定期間において基準位置から前記可動反射面を移動させ、非測定期間において前記可動反射面を前記基準位置に戻すことで、前記可動反射面を往復運動させ、
前記計数部は、前記測定期間において前記粒子の計数を行い、前記非測定期間において前記粒子の計数を行わないこと、
を特徴とする請求項2記載のパーティクルカウンタ。 - 前記所定速度は、さらに、前記受光素子の周波数特性、および前記アンプの周波数特性に基づいて設定されることを特徴とする請求項1から請求項3のうちのいずれか1項記載のパーティクルカウンタ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018043571A JP7071849B2 (ja) | 2018-03-09 | 2018-03-09 | パーティクルカウンタ |
US16/290,788 US10705010B2 (en) | 2018-03-09 | 2019-03-01 | Particle counter |
KR1020190024719A KR102166583B1 (ko) | 2018-03-09 | 2019-03-04 | 파티클 카운터 |
CN201910173746.5A CN110243729B (zh) | 2018-03-09 | 2019-03-07 | 粒子计数器 |
TW108107844A TWI685650B (zh) | 2018-03-09 | 2019-03-08 | 粒子計數器 |
Applications Claiming Priority (1)
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JP2018043571A JP7071849B2 (ja) | 2018-03-09 | 2018-03-09 | パーティクルカウンタ |
Publications (3)
Publication Number | Publication Date |
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JP2019158478A true JP2019158478A (ja) | 2019-09-19 |
JP2019158478A5 JP2019158478A5 (ja) | 2021-04-30 |
JP7071849B2 JP7071849B2 (ja) | 2022-05-19 |
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US (1) | US10705010B2 (ja) |
JP (1) | JP7071849B2 (ja) |
KR (1) | KR102166583B1 (ja) |
CN (1) | CN110243729B (ja) |
TW (1) | TWI685650B (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7326256B2 (ja) | 2017-10-26 | 2023-08-15 | パーティクル・メージャーリング・システムズ・インコーポレーテッド | 粒子計測システム及び方法 |
US10928297B2 (en) | 2019-01-09 | 2021-02-23 | University Of Washington | Method for determining detection angle of optical particle sizer |
US11237095B2 (en) | 2019-04-25 | 2022-02-01 | Particle Measuring Systems, Inc. | Particle detection systems and methods for on-axis particle detection and/or differential detection |
CN114729868A (zh) | 2019-11-22 | 2022-07-08 | 粒子监测系统有限公司 | 先进的用于干涉测量颗粒检测和具有小大小尺寸的颗粒的检测的系统和方法 |
US20230236107A1 (en) * | 2022-01-21 | 2023-07-27 | Particle Measuring Systems, Inc. | Enhanced dual-pass and multi-pass particle detection |
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- 2019-03-04 KR KR1020190024719A patent/KR102166583B1/ko active IP Right Grant
- 2019-03-07 CN CN201910173746.5A patent/CN110243729B/zh active Active
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Publication number | Publication date |
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CN110243729A (zh) | 2019-09-17 |
JP7071849B2 (ja) | 2022-05-19 |
US20190277745A1 (en) | 2019-09-12 |
US10705010B2 (en) | 2020-07-07 |
KR20190106724A (ko) | 2019-09-18 |
TWI685650B (zh) | 2020-02-21 |
CN110243729B (zh) | 2022-07-15 |
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