FR2436383A1 - Analyser for granulometric analysis of particles in fluid - has flow through chamber in which light is reflected from particles - Google Patents

Analyser for granulometric analysis of particles in fluid - has flow through chamber in which light is reflected from particles

Info

Publication number
FR2436383A1
FR2436383A1 FR7826427A FR7826427A FR2436383A1 FR 2436383 A1 FR2436383 A1 FR 2436383A1 FR 7826427 A FR7826427 A FR 7826427A FR 7826427 A FR7826427 A FR 7826427A FR 2436383 A1 FR2436383 A1 FR 2436383A1
Authority
FR
France
Prior art keywords
light
chamber
particles
light source
fluid
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.)
Granted
Application number
FR7826427A
Other languages
French (fr)
Other versions
FR2436383B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7826427A priority Critical patent/FR2436383A1/en
Publication of FR2436383A1 publication Critical patent/FR2436383A1/en
Application granted granted Critical
Publication of FR2436383B1 publication Critical patent/FR2436383B1/fr
Granted 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—Electro-optical investigation, e.g. flow cytometers
    • G01N15/1434—Electro-optical investigation, e.g. flow cytometers using an analyser being characterised by its optical arrangement

Abstract

The analyser comprises a flow-through chamber having a light source outside the chamber which directs a convergent light beam through a transparent window in the chamber wall into the chamber. A light sensitive element outside the chamber opposite a second transparent window receives light reflected from particles in the fluid. The second window is shaped as a cylinder which has its axis matched with the optical axis of the light source and serves as the walls of the flow-through chamber. The optical system of the light source is such that the point of intersection of the optical axes of the light source and light sensitive element is beyond the focus of the light source in the direction of the light flux. The solid angle of the convergent light beam is in the range O = alpha = 2 Arccos 1/n, (in which n, is the refractive index of the fluid being investigated. Granulometric analysis of particulate impurities in fuels and lubricants. The solid angle alpha is selected to ensure complete internal reflection of light from the outer walls of the cylinder. This prevents light reflected from the chamber walls being received by the light sensitive element.
FR7826427A 1978-09-14 1978-09-14 Analyser for granulometric analysis of particles in fluid - has flow through chamber in which light is reflected from particles Granted FR2436383A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7826427A FR2436383A1 (en) 1978-09-14 1978-09-14 Analyser for granulometric analysis of particles in fluid - has flow through chamber in which light is reflected from particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7826427A FR2436383A1 (en) 1978-09-14 1978-09-14 Analyser for granulometric analysis of particles in fluid - has flow through chamber in which light is reflected from particles

Publications (2)

Publication Number Publication Date
FR2436383A1 true FR2436383A1 (en) 1980-04-11
FR2436383B1 FR2436383B1 (en) 1981-04-10

Family

ID=9212644

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7826427A Granted FR2436383A1 (en) 1978-09-14 1978-09-14 Analyser for granulometric analysis of particles in fluid - has flow through chamber in which light is reflected from particles

Country Status (1)

Country Link
FR (1) FR2436383A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1418260A (en) * 1964-10-09 1965-11-19 Rech S Scient Et Ind Ersi Et Apparatus for measuring the physical characteristics of particles suspended in a fluid
US3462608A (en) * 1966-12-19 1969-08-19 Dynac Corp Method and apparatus for detecting suspended particles
US3504183A (en) * 1966-09-12 1970-03-31 Iit Res Inst Particle counter using a variable test volume
US3738759A (en) * 1969-04-18 1973-06-12 W Dittrich Apparatus and methods for flow photometry of particles of a dispersion
US3800147A (en) * 1969-01-22 1974-03-26 Gam Rad Turbidimeter with formed flow chamber
US4053229A (en) * 1976-01-13 1977-10-11 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration 2°/90° Laboratory scattering photometer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1418260A (en) * 1964-10-09 1965-11-19 Rech S Scient Et Ind Ersi Et Apparatus for measuring the physical characteristics of particles suspended in a fluid
US3504183A (en) * 1966-09-12 1970-03-31 Iit Res Inst Particle counter using a variable test volume
US3462608A (en) * 1966-12-19 1969-08-19 Dynac Corp Method and apparatus for detecting suspended particles
US3800147A (en) * 1969-01-22 1974-03-26 Gam Rad Turbidimeter with formed flow chamber
US3738759A (en) * 1969-04-18 1973-06-12 W Dittrich Apparatus and methods for flow photometry of particles of a dispersion
US4053229A (en) * 1976-01-13 1977-10-11 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration 2°/90° Laboratory scattering photometer

Also Published As

Publication number Publication date
FR2436383B1 (en) 1981-04-10

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