CA2399222A1 - Systems, apparatuses and methods for diamond color measurement and analysis - Google Patents

Systems, apparatuses and methods for diamond color measurement and analysis Download PDF

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Publication number
CA2399222A1
CA2399222A1 CA002399222A CA2399222A CA2399222A1 CA 2399222 A1 CA2399222 A1 CA 2399222A1 CA 002399222 A CA002399222 A CA 002399222A CA 2399222 A CA2399222 A CA 2399222A CA 2399222 A1 CA2399222 A1 CA 2399222A1
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CA
Canada
Prior art keywords
light
diamond
daylight
analysis
apparatuses
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Granted
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CA002399222A
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French (fr)
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CA2399222C (en
Inventor
Peter De Jong
Ronald Geurts
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Gemological Institute of America Inc
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Individual
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Publication of CA2399222A1 publication Critical patent/CA2399222A1/en
Application granted granted Critical
Publication of CA2399222C publication Critical patent/CA2399222C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/87Investigating jewels
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands

Abstract

The present invention comprises systems, apparatuses and methods for measuring and analyzing gem color in a way which reliably and consistently simulates visual color analysis methodology. The preferred system embodiment of the present invention comprises several aspects, including the use of daylight approximating lamps (10), such as daylight approximating fluorescent tubes or halogen lamp boosted with a filter to approximate daylight, and a light detector which light of a specific angle such that the system approximates visual analysis methodology. In the case of diamond analysis, in one embodiment, the system of the invention includes three major elements: a daylight approximating light source (10) that illuminates the pavilion side of the diamond (40), a light detector (30) which detects light coming out at a specific angle from the pavilion side of the diamond (40), and an optical measurement device which measures the light detected by the light detector (30).
CA002399222A 2000-02-16 2001-02-06 Systems, apparatuses and methods for diamond color measurement and analysis Expired - Lifetime CA2399222C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/505,981 US6473164B1 (en) 2000-02-16 2000-02-16 Systems, apparatuses and methods for diamond color measurement and analysis
US09/505,981 2000-02-16
PCT/US2001/003869 WO2001061316A1 (en) 2000-02-16 2001-02-06 Systems, apparatuses and methods for diamond color measurement and analysis

Publications (2)

Publication Number Publication Date
CA2399222A1 true CA2399222A1 (en) 2001-08-23
CA2399222C CA2399222C (en) 2005-08-16

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Family Applications (1)

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CA002399222A Expired - Lifetime CA2399222C (en) 2000-02-16 2001-02-06 Systems, apparatuses and methods for diamond color measurement and analysis

Country Status (15)

Country Link
US (1) US6473164B1 (en)
EP (1) EP1274982A4 (en)
JP (1) JP3790827B2 (en)
KR (1) KR20020075433A (en)
CN (1) CN100430713C (en)
AU (2) AU2001234875B2 (en)
CA (1) CA2399222C (en)
EA (1) EA008016B1 (en)
HK (1) HK1051721A1 (en)
IL (1) IL150989A0 (en)
MX (1) MXPA02007812A (en)
TW (1) TW548401B (en)
UA (1) UA73978C2 (en)
WO (1) WO2001061316A1 (en)
ZA (1) ZA200206079B (en)

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Also Published As

Publication number Publication date
JP3790827B2 (en) 2006-06-28
HK1051721A1 (en) 2003-08-15
TW548401B (en) 2003-08-21
ZA200206079B (en) 2003-01-30
IL150989A0 (en) 2003-02-12
JP2003523513A (en) 2003-08-05
EP1274982A4 (en) 2004-06-09
EP1274982A1 (en) 2003-01-15
KR20020075433A (en) 2002-10-04
CN100430713C (en) 2008-11-05
US6473164B1 (en) 2002-10-29
EA008016B1 (en) 2007-02-27
AU3487501A (en) 2001-08-27
MXPA02007812A (en) 2003-03-10
CN1398346A (en) 2003-02-19
AU2001234875B2 (en) 2005-01-27
CA2399222C (en) 2005-08-16
UA73978C2 (en) 2005-10-17
WO2001061316A1 (en) 2001-08-23
EA200200782A1 (en) 2003-02-27

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