US4606636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical apparatus for identifying the individual multiparametric properties of particles or bodies in a continuous flow
Assignee: UNIVERSITE DE SAINT ETIENNE
•
Filing: 1983-10-25
•
Granted: 1986-08-19
•
Expires: 2003-10-25
Abstract
Abstract Apparatus for identifying multiparametric properties of particles, comprising: a non-divergent quadric reflector, a transparent capillary tube passing through the focus of said reflector, at least one means of irradiating the focus, a mask obstructing the non-reflected scattered rays, a photosensitive cell receiving the reflected scattered rays, and means of processing the signals. An application to the monitoring of latex particle size distribution is described.
Inventors
- 👤 Jean Monin
- 👤 Bernard Faure
- 👤 Georges Soldat
- 👤 Jean-Claude Healy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:25
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1434; G01N15/1436; G01N2015/1477; G01N2015/1486; G01N2015/1493; G01N21/00; G01N21/17; G01N21/47; G01N2021/4702; G01N21/62; G01N21/63; G01N21/64; G01N21/645; G01N2021/6463; G01N2021/6469
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
150 words
An optical apparatus for identifying individual multiparametric properties of particles or bodies moving in a continuous flow, said apparatus comprising: an open-ended, non divergent quadric reflector having a focal point, a transparent, continuous capillary tube passing through said focal point of said reflector and providing for the movement, individually, of particles in suspension in a fluid medium, radiating means capable of directing a beam of radiation normal to the direction of particle movement in said capillary tube through said focal point, said beam of radiation upon striking said particle producing different rays, a mask obstructing a portion of said diffracted rays scattered by a particle intersecting the incident beam of the radiating means at the reflector focus and not striking the reflector, a detecting means for receiving the various reflected scattered rays for producing a signal thereof, and means for processing and using said signals supplied by said detecting means.
Claim 2
Dependent Claim
150 words
An optical apparatus for identifying individual multiparametric properties of particles or bodies moving in a continuous flow, said apparatus comprising: an open-ended, non divergent quadric reflector having a focal point, a transparent, continuous capillary tube passing through said focal point of said reflector and providing for the movement, individually, of particles in suspension in a fluid medium, radiating means capable of directing a beam of radiation normal to the direction of particle movement in said capillary tube through said focal point, said beam of radiation upon striking said particle producing different rays, a mask obstructing a portion of said diffracted rays scattered by a particle intersecting the incident beam of the radiating means at the reflector focus and not striking the reflector, a detecting means for receiving the various reflected scattered rays for producing a signal thereof, and means for processing and using said signals supplied by said detecting means.
Claim 3
Dependent Claim
55 words
An apparatus as in claim 1, wherein said capillary tube passes through the apex of said reflector and extends along the axis of revolution of said reflector and wherein at least one radiating means is provided, comprising a source positioned in radial relation to the reflector and emitting a beam aimed at said reflector focus.
Claim 4
Dependent Claim
14 words
An apparatus as in claim 2, wherein said mask is supported by said tube.
Claim 5
Dependent Claim
40 words
An apparatus as in claim 1, wherein said capillary tube is installed in a plane perpendicular to the reflector's axis of revolution, said capillary tube passing through said focus where it intersects the beam of at least one radiating means.
Claim 6
Dependent Claim
18 words
An apparatus as in claim 2, comprising a plurality of radiating means each emitting at a different wavelength.
Claim 7
Dependent Claim
29 words
An apparatus as in claim 5, wherein a borehole is provided through the reflector for each radiating means at a point diametrically opposite the point occupied by said means.
Claim 8
Dependent Claim
29 words
An apparatus as in claim 1, wherein the radiating means provides an irradiated spot at the focus on the same order of size as the particle to be identified.
Claim 9
Dependent Claim
15 words
An apparatus as in claim 1, wherein the radiating means comprises a laser beam source.
Claim 10
Dependent Claim
15 words
An apparatus as in claim 1, wherein the detecting means consists of a photosensitive sensor.
Claim 11
Dependent Claim
46 words
An apparatus as in claim 1, wherein the transparent capillary tube has a useful internal cross-section substantially related to the average dimension of the particles under study so as to allow only a particle by particle progress through the measuring space intersected by the radiating means.
Claim 12
Dependent Claim
15 words
An apparatus as in claim 1, wherein the detecting means consists of an optical scanner.
Claim 13
Dependent Claim
15 words
An apparatus as in claim 1, wherein the detecting means consists of a video camera.
References Cited (Backward Citations)
US3457407A
Cited
US3508830A
Cited
DE1931631A1
Cited
FR2069514A5
Cited
US3932762A
Cited
US3985441A
Cited
US4124302A
Cited
US4189236A
Cited
GB2044445A
Cited
GB2042166A
Cited
US4200802A
Cited
FR2459966A1
Cited
US4273443A
Cited
US4311387A
Cited
US4348107A
Cited
US4422761A
Cited
US4479058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |