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GB2285311B - Particle classification method and apparatus - Google Patents

Particle classification method and apparatus

Info

Publication number
GB2285311B
GB2285311B GB9425994A GB9425994A GB2285311B GB 2285311 B GB2285311 B GB 2285311B GB 9425994 A GB9425994 A GB 9425994A GB 9425994 A GB9425994 A GB 9425994A GB 2285311 B GB2285311 B GB 2285311B
Authority
GB
United Kingdom
Prior art keywords
classification method
particle classification
particle
classification
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 - Fee Related
Application number
GB9425994A
Other versions
GB2285311A (en
GB9425994D0 (en
Inventor
Con-Vivier Venter
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.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty Ltd
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 De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Publication of GB9425994D0 publication Critical patent/GB9425994D0/en
Publication of GB2285311A publication Critical patent/GB2285311A/en
Application granted granted Critical
Publication of GB2285311B publication Critical patent/GB2285311B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65—Raman scattering
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/87—Investigating jewels

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
GB9425994A 1993-12-30 1994-12-22 Particle classification method and apparatus Expired - Fee Related GB2285311B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA939797 1993-12-30

Publications (3)

Publication Number Publication Date
GB9425994D0 GB9425994D0 (en) 1995-02-22
GB2285311A GB2285311A (en) 1995-07-05
GB2285311B true GB2285311B (en) 1998-01-14

Family

ID=25583567

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9425994A Expired - Fee Related GB2285311B (en) 1993-12-30 1994-12-22 Particle classification method and apparatus

Country Status (6)

Country Link
AU (1) AU687470B2 (en)
BR (1) BR9405310A (en)
CA (1) CA2139178C (en)
GB (1) GB2285311B (en)
RU (1) RU94045262A (en)
ZA (1) ZA9410191B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA955745B (en) * 1994-08-19 1996-02-20 De Beers Ind Diamond Classification of particles according to their Raman response

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786170A (en) * 1985-07-26 1988-11-22 Jenoptik Jena G.M.B.H. Apparatus for the graphic representation and analysis of fluorescence signals
GB2219080A (en) * 1988-05-06 1989-11-29 Gersan Ets Identifying gemstones
US5275168A (en) * 1992-03-31 1994-01-04 The United States Of America As Represented By The Secretary Of The Navy Time-gated imaging through dense-scattering materials using stimulated Raman amplification

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286170A (en) * 1980-02-11 1981-08-25 Samuel Moti X-Ray face mask and chest shield device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786170A (en) * 1985-07-26 1988-11-22 Jenoptik Jena G.M.B.H. Apparatus for the graphic representation and analysis of fluorescence signals
GB2219080A (en) * 1988-05-06 1989-11-29 Gersan Ets Identifying gemstones
US5275168A (en) * 1992-03-31 1994-01-04 The United States Of America As Represented By The Secretary Of The Navy Time-gated imaging through dense-scattering materials using stimulated Raman amplification

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J Phys E: Sci Instr 19 (1986), pages 934-943, J Howard et al"Fluorescence Rejection in Raman.." *

Also Published As

Publication number Publication date
CA2139178C (en) 2007-01-30
AU687470B2 (en) 1998-02-26
GB2285311A (en) 1995-07-05
ZA9410191B (en) 1995-08-25
CA2139178A1 (en) 1995-07-01
GB9425994D0 (en) 1995-02-22
RU94045262A (en) 1996-10-20
BR9405310A (en) 1995-09-19
AU8178294A (en) 1995-07-06

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Legal Events

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

Effective date: 20001222