GB1335466A - Optical particle sensor - Google Patents

Optical particle sensor

Info

Publication number
GB1335466A
GB1335466A GB1335466DA GB1335466A GB 1335466 A GB1335466 A GB 1335466A GB 1335466D A GB1335466D A GB 1335466DA GB 1335466 A GB1335466 A GB 1335466A
Authority
GB
United Kingdom
Prior art keywords
light
detector
tube
particle sensor
optical particle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coulter Electronics Inc
Original Assignee
Coulter Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coulter Electronics Inc filed Critical Coulter Electronics Inc
Publication of GB1335466A publication Critical patent/GB1335466A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

1335466 Optical particle sensor COULTER ELECTRONICS INC 29 Jan 1971 3496/71 Heading G1A [Also in Division G2] In an optical particle sensor for determining size and concentration of particles suspended in a flowing liquid or gas, a truncated conical light guide 24 is attached to the receiving surface 21 of the detector 18 to direct light scattered by the particles thereto. Light transmitted directly through the fluid on the optical axis is directed away from the detector by a tube 22 which is blackened so as to absorb this light and has a specularly reflecting surface so as to conduct away light down the tube which is not immediately absorbed by the black colour. The end 23 of tube 22 is open and its outer end closed. The surface 26 of the cone member 24 is curved such that its centre of curvature lies at the axis of flow of the fluid under test, at which point light from a filament lamp is focused. The guide member 24 is cast of plastics material and has an outer aluminium coating 27 to direct all the collected light towards the detector which is a photomultiplier.
GB1335466D 1971-01-29 1971-01-29 Optical particle sensor Expired GB1335466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB349671 1971-01-29

Publications (1)

Publication Number Publication Date
GB1335466A true GB1335466A (en) 1973-10-31

Family

ID=9759431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1335466D Expired GB1335466A (en) 1971-01-29 1971-01-29 Optical particle sensor

Country Status (1)

Country Link
GB (1) GB1335466A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2347676A1 (en) * 1976-04-05 1977-11-04 Cerberus Ag SMOKE DETECTOR
US4523841A (en) * 1979-03-15 1985-06-18 Coulter Electronics, Inc. Radiant energy reradiating flow cell system and method
EP1756547B1 (en) * 2004-03-01 2014-05-14 Partec GmbH Device for measuring light emitted by microscopically small particles or biological cells

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2347676A1 (en) * 1976-04-05 1977-11-04 Cerberus Ag SMOKE DETECTOR
US4523841A (en) * 1979-03-15 1985-06-18 Coulter Electronics, Inc. Radiant energy reradiating flow cell system and method
EP1756547B1 (en) * 2004-03-01 2014-05-14 Partec GmbH Device for measuring light emitted by microscopically small particles or biological cells

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee