GB2317692A - Examining a diamond - Google Patents

Examining a diamond

Info

Publication number
GB2317692A
GB2317692A GB9800372A GB9800372A GB2317692A GB 2317692 A GB2317692 A GB 2317692A GB 9800372 A GB9800372 A GB 9800372A GB 9800372 A GB9800372 A GB 9800372A GB 2317692 A GB2317692 A GB 2317692A
Authority
GB
United Kingdom
Prior art keywords
diamond
examining
luminescence
irradiated
measured
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
GB9800372A
Other versions
GB9800372D0 (en
GB2317692B (en
Inventor
Christopher Mark Welbourn
Martin Phillip Smith
James Gordon Charters Smith
Paul Martyn Spear
Philip Maurice Martineau
Martin Cooper
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.)
Gersan Ets
Original Assignee
Gersan Ets
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
Priority claimed from GB9515143A external-priority patent/GB2303698A/en
Application filed by Gersan Ets filed Critical Gersan Ets
Priority to GB9800372A priority Critical patent/GB2317692B/en
Publication of GB9800372D0 publication Critical patent/GB9800372D0/en
Publication of GB2317692A publication Critical patent/GB2317692A/en
Application granted granted Critical
Publication of GB2317692B publication Critical patent/GB2317692B/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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/87—Investigating jewels

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (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)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

In order to test whether a diamond has had a layer of synthetic diamond deposited thereon, it is irradiated with high energy ultraviolet radiation to cause emission of luminescence, the luminescence intensity produced by different zones of the diamond being measured and compared. In one embodiment an integrating enclosure (15) is used and the diamond (13) is mounted on a rotatable mount (14).
GB9800372A 1995-07-24 1996-07-22 Examining a diamond Expired - Fee Related GB2317692B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9800372A GB2317692B (en) 1995-07-24 1996-07-22 Examining a diamond

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9515143A GB2303698A (en) 1995-07-24 1995-07-24 A method and apparatus for detecting layers of synthetic diamond
PCT/GB1996/001751 WO1997004302A1 (en) 1995-07-24 1996-07-22 Examining a diamond
GB9800372A GB2317692B (en) 1995-07-24 1996-07-22 Examining a diamond

Publications (3)

Publication Number Publication Date
GB9800372D0 GB9800372D0 (en) 1998-03-04
GB2317692A true GB2317692A (en) 1998-04-01
GB2317692B GB2317692B (en) 1999-11-24

Family

ID=26307446

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9800372A Expired - Fee Related GB2317692B (en) 1995-07-24 1996-07-22 Examining a diamond

Country Status (1)

Country Link
GB (1) GB2317692B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2336901A (en) * 1998-04-30 1999-11-03 Gersan Ets Examining diamonds

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2818841A1 (en) * 1977-04-30 1978-11-09 Olympus Optical Co MICROSCOPE FOR DETERMINING FLUORESCENCES
EP0425426A2 (en) * 1989-10-27 1991-05-02 Wellborn Ltd. Method for identifying gemstones, particularly diamonds
GB2275788A (en) * 1993-03-05 1994-09-07 Gersan Ets Distinguishing natural from synthetic diamond
US5406367A (en) * 1993-05-10 1995-04-11 Midwest Research Institute Defect mapping system
GB2293236A (en) * 1994-09-07 1996-03-20 Gersan Ets Examining a diamond

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2818841A1 (en) * 1977-04-30 1978-11-09 Olympus Optical Co MICROSCOPE FOR DETERMINING FLUORESCENCES
EP0425426A2 (en) * 1989-10-27 1991-05-02 Wellborn Ltd. Method for identifying gemstones, particularly diamonds
GB2275788A (en) * 1993-03-05 1994-09-07 Gersan Ets Distinguishing natural from synthetic diamond
US5406367A (en) * 1993-05-10 1995-04-11 Midwest Research Institute Defect mapping system
GB2293236A (en) * 1994-09-07 1996-03-20 Gersan Ets Examining a diamond

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2336901A (en) * 1998-04-30 1999-11-03 Gersan Ets Examining diamonds

Also Published As

Publication number Publication date
GB9800372D0 (en) 1998-03-04
GB2317692B (en) 1999-11-24

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Legal Events

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

Effective date: 20030722