GB2317693A - Examining a diamond - Google Patents

Examining a diamond

Info

Publication number
GB2317693A
GB2317693A GB9800373A GB9800373A GB2317693A GB 2317693 A GB2317693 A GB 2317693A GB 9800373 A GB9800373 A GB 9800373A GB 9800373 A GB9800373 A GB 9800373A GB 2317693 A GB2317693 A GB 2317693A
Authority
GB
United Kingdom
Prior art keywords
diamond
radiation
examining
pattern
refracted
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
GB9800373A
Other versions
GB9800373D0 (en
GB2317693B (en
Inventor
Martin Phillip Smith
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 GB9515144A external-priority patent/GB2303699A/en
Application filed by Gersan Ets filed Critical Gersan Ets
Priority to GB9800373A priority Critical patent/GB2317693B/en
Publication of GB9800373D0 publication Critical patent/GB9800373D0/en
Publication of GB2317693A publication Critical patent/GB2317693A/en
Application granted granted Critical
Publication of GB2317693B publication Critical patent/GB2317693B/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 Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

In order to test whether a diamond (2) has had a layer of synthetic diamond deposited theron, it is irradiated with ultraviolet radiation (4) so as to form a pattern of beams of refracted and reflected radiation, the pattern of reflected and refracted radiation being observed on a screen (5) behind the diamond (2).
GB9800373A 1995-07-24 1996-07-22 Examining a diamond Expired - Fee Related GB2317693B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9800373A GB2317693B (en) 1995-07-24 1996-07-22 Examining a diamond

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9515144A GB2303699A (en) 1995-07-24 1995-07-24 A method and apparatus for detecting layers of synthetic diamond
GB9800373A GB2317693B (en) 1995-07-24 1996-07-22 Examining a diamond
PCT/GB1996/001752 WO1997004303A1 (en) 1995-07-24 1996-07-22 Examining a diamond

Publications (3)

Publication Number Publication Date
GB9800373D0 GB9800373D0 (en) 1998-03-04
GB2317693A true GB2317693A (en) 1998-04-01
GB2317693B GB2317693B (en) 1999-10-06

Family

ID=26307448

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9800373A Expired - Fee Related GB2317693B (en) 1995-07-24 1996-07-22 Examining a diamond

Country Status (1)

Country Link
GB (1) GB2317693B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740142A (en) * 1969-08-24 1973-06-19 Fumio Suruki Apparatus for discriminating and/or identifying jewels
US3947120A (en) * 1973-10-23 1976-03-30 Yeda Research And Development Co. Ltd. Gem identification
EP0071462A1 (en) * 1981-07-27 1983-02-09 Lce, Ltd. Method and apparatus for analyzing gems
GB2275788A (en) * 1993-03-05 1994-09-07 Gersan Ets Distinguishing natural from synthetic diamond
GB2286251A (en) * 1994-01-25 1995-08-09 Gersan Ets Examining a diamond for synthetic diamond

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3740142A (en) * 1969-08-24 1973-06-19 Fumio Suruki Apparatus for discriminating and/or identifying jewels
US3947120A (en) * 1973-10-23 1976-03-30 Yeda Research And Development Co. Ltd. Gem identification
EP0071462A1 (en) * 1981-07-27 1983-02-09 Lce, Ltd. Method and apparatus for analyzing gems
GB2275788A (en) * 1993-03-05 1994-09-07 Gersan Ets Distinguishing natural from synthetic diamond
GB2286251A (en) * 1994-01-25 1995-08-09 Gersan Ets Examining a diamond for synthetic diamond

Also Published As

Publication number Publication date
GB9800373D0 (en) 1998-03-04
GB2317693B (en) 1999-10-06

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Legal Events

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

Effective date: 20020722