FR2438837A1 - Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses - Google Patents

Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses

Info

Publication number
FR2438837A1
FR2438837A1 FR7924974A FR7924974A FR2438837A1 FR 2438837 A1 FR2438837 A1 FR 2438837A1 FR 7924974 A FR7924974 A FR 7924974A FR 7924974 A FR7924974 A FR 7924974A FR 2438837 A1 FR2438837 A1 FR 2438837A1
Authority
FR
France
Prior art keywords
precious stone
light
axis
diamonds
denoted
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
FR7924974A
Other languages
English (en)
Other versions
FR2438837B1 (fr
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 Consolidated Mines Ltd
Original Assignee
De Beers Consolidated Mines 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 Consolidated Mines Ltd filed Critical De Beers Consolidated Mines Ltd
Publication of FR2438837A1 publication Critical patent/FR2438837A1/fr
Application granted granted Critical
Publication of FR2438837B1 publication Critical patent/FR2438837B1/fr
Granted 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)
  • Spectrometry And Color Measurement (AREA)

Abstract

L'INVENTION CONCERNE UN PROCEDE DE DETERMINATION DE LA COULEUR D'UN DIAMANT OU D'AUTRES PIERRES PRECIEUSES. SELON L'INVENTION, ON ALIGNE LA TABLE DE LA PIERRE Z PERPENDICULAIREMENT A L'AXE DU FAISCEAU LUMINEUX EMIS PAR UNE SOURCE, ON REND COLINEAIRES L'AXE DU FAISCEAU LUMINEUX ET L'AXE DE SYMETRIE DE LA PIERRE Z PERPENDICULAIRE A LA TABLE, ON PROJETTE SUR LA PIERRE Z, DE LA LUMIERE D'UNE LONGUEUR D'ONDE UNIQUE DONNEE, ON DETERMINE LA PROPORTION DE LA LUMIERE INCIDENTE TRANSMISE PAR LA PIERRE, ON REPETE CETTE DETERMINATION POUR DIFFERENTES LONGUEURS D'ONDE DE LA GAMME VISIBLE POUR OBTENIR UN SPECTRE DE TRANSMISSION ET ON CALCULE LES COORDONNEES CHROMATIQUES A PARTIR DE CES VALEURS. CE PROCEDE PERMET D'OBTENIR UN EVALUATION COMPLETEMENT OBJECTIVE DE LA COULEUR DE LA PIERRE PRECIEUSE.
FR7924974A 1978-10-09 1979-10-08 Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses Granted FR2438837A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7839847 1978-10-09

Publications (2)

Publication Number Publication Date
FR2438837A1 true FR2438837A1 (fr) 1980-05-09
FR2438837B1 FR2438837B1 (fr) 1983-02-25

Family

ID=10500211

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7924974A Granted FR2438837A1 (fr) 1978-10-09 1979-10-08 Procede de determination de la couleur d'un diamant ou d'autres pierres precieuses

Country Status (9)

Country Link
JP (1) JPS5598341A (fr)
AU (1) AU527834B2 (fr)
BE (1) BE879290A (fr)
CH (1) CH644452A5 (fr)
DE (1) DE2940625A1 (fr)
FR (1) FR2438837A1 (fr)
IL (1) IL58344A (fr)
NL (1) NL189426C (fr)
ZA (1) ZA795228B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041348A2 (fr) * 1980-06-04 1981-12-09 De Beers Consolidated Mines Limited Procédé pour analyser la couleur des diamants et autres pierres précieuses
BE1006575A3 (fr) * 1992-12-18 1994-10-18 Taiko Co Ltd Dispositif d'agrandissement pour des pierres precieuses presentant des facettes taillees qui y sont faconnees.
FR2768513A1 (fr) * 1997-09-15 1999-03-19 Jean Pierre Delgrande Procede d'analyse colorimetrique comparative et dispositif correspondant

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58728A (ja) * 1981-06-25 1983-01-05 Shimadzu Corp ダイヤモンドカラ−測定装置
JPS5830644A (ja) * 1981-08-14 1983-02-23 Ii R C:Kk 光軸を確定する方法
WO2019129238A1 (fr) * 2017-12-29 2019-07-04 Goldway Technology Limited Procédé et système de mesure de clarté de diamant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992588A (en) * 1958-02-03 1961-07-18 Beckman Instruments Inc Photometer reflectance unit
FR2222651A1 (fr) * 1973-03-20 1974-10-18 Dihaco Diamanten Handels Co

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1772105C2 (de) * 1968-03-30 1974-04-04 Eickhorst, Manfred, 2000 Hamburg Vorrichtung zur Bestimmung der photometrischen Transmission geschliffener Diamanten
BE789234A (fr) * 1971-09-29 1973-01-15 Colorant Schmuckstein G M B H Procede et dispositif pour l'enregistrement des qualites de pierres de bijouterie
ZA765149B (en) * 1976-08-27 1978-04-26 De Beers Ind Diamond Measurement of optical properties
JPS5378855A (en) * 1976-12-21 1978-07-12 Nec Corp Polygonal jewery identifying device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992588A (en) * 1958-02-03 1961-07-18 Beckman Instruments Inc Photometer reflectance unit
FR2222651A1 (fr) * 1973-03-20 1974-10-18 Dihaco Diamanten Handels Co

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXRV/70 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041348A2 (fr) * 1980-06-04 1981-12-09 De Beers Consolidated Mines Limited Procédé pour analyser la couleur des diamants et autres pierres précieuses
EP0041348A3 (en) * 1980-06-04 1982-03-31 De Beers Consolidated Mines Limited A method of assessing the colour in diamonds and other gems and a set of diamonds or other gems graded by the method
BE1006575A3 (fr) * 1992-12-18 1994-10-18 Taiko Co Ltd Dispositif d'agrandissement pour des pierres precieuses presentant des facettes taillees qui y sont faconnees.
FR2768513A1 (fr) * 1997-09-15 1999-03-19 Jean Pierre Delgrande Procede d'analyse colorimetrique comparative et dispositif correspondant

Also Published As

Publication number Publication date
FR2438837B1 (fr) 1983-02-25
NL189426B (nl) 1992-11-02
ZA795228B (en) 1980-09-24
CH644452A5 (en) 1984-07-31
JPS5598341A (en) 1980-07-26
NL7907348A (nl) 1980-04-11
AU527834B2 (en) 1983-03-24
NL189426C (nl) 1993-04-01
IL58344A (en) 1983-09-30
AU5150579A (en) 1980-04-17
BE879290A (fr) 1980-04-09
DE2940625A1 (de) 1980-06-04

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Legal Events

Date Code Title Description
ST Notification of lapse