WO2017085730A1 - Appareil et procédé d'identification de diamants synthétiques - Google Patents

Appareil et procédé d'identification de diamants synthétiques Download PDF

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Publication number
WO2017085730A1
WO2017085730A1 PCT/IN2016/000094 IN2016000094W WO2017085730A1 WO 2017085730 A1 WO2017085730 A1 WO 2017085730A1 IN 2016000094 W IN2016000094 W IN 2016000094W WO 2017085730 A1 WO2017085730 A1 WO 2017085730A1
Authority
WO
WIPO (PCT)
Prior art keywords
diamonds
radiation
processing unit
filter
synthetic
Prior art date
Application number
PCT/IN2016/000094
Other languages
English (en)
Inventor
Dayalbhai Goti Shailesh
Original Assignee
Dayalbhai Goti Shailesh
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 Dayalbhai Goti Shailesh filed Critical Dayalbhai Goti Shailesh
Publication of WO2017085730A1 publication Critical patent/WO2017085730A1/fr

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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

Definitions

  • the present invention relates to the field of diamond and jewellery industry. More particularly it relates to an identification technique to identify synthetic, lab grown or manmade diamonds.
  • a synthetic diamond (also known as an artificial diamond, cultured diamond, or cultivated diamond) is diamond produced by human in a laboratory or a diamonds which is not produced by nature or natural processes,. Synthetic diamond is also widely known as HPHT* diamond (referring to the high-pressure high-temperature method) and CVD diamond (referring to chemical vapor deposition crystal formation method) after the two common production methods.
  • HPHT* diamond referring to the high-pressure high-temperature method
  • CVD diamond referring to chemical vapor deposition crystal formation method
  • the main object of the present invention is to provide a mechanism (an apparatus and method) for identifying synthetic diamonds which provides nearly fool-proof and. accurate results.
  • Another object of the invention is to provide the mechanism (an apparatus and method) for identifying synthetic diamonds which is repeatable and reliable.
  • the present invention provides ah apparatus for identifying synthetic diamonds, the apparatus comprising: a platform for accommodating diamonds to be identified; a source of light being configured to emit a beam of monochromatic laser radiation of predetermined wavelength and irradiate the diamonds with the monochromatic laser radiation of predetermined wavelength; a filter being configured to pass only scattered Raman radiation of frequency characteristics of the diamonds out of the ration emitted by the diamonds, the filter being placed at right angle to the scattered beam of radiation; a photocell device to detect and receive the scattered Raman radiation passed by the filter, the photocell device being, configured to generate photo luminescence signal for the diamond on the basis of received scattered Raman radiation; and a processing unit being operatively connected to the photocell device and configurecf to:
  • the present invention also provides a method for identifying synthetic diamonds, the method comprising steps of placing diamonds to be identified on a platform; irradiating, by a source of light, the diamonds with the monochromatic laser radiation of predetennined wavelength; emitting, by the diamonds, the radiation as a result of irradiation with the monochromatic laser radiation; separating, by a filter, out of the ration emitted by the diamonds, only scattered Raman radiation of frequency characteristics of the diamonds; placing the filter at right angle to the scattered beam of radiation; detecting and receiving, by a photocell device, the scattered Raman radiation separated by the filter generating, by the photocell device, a photo luminescence signal for the diamond on the basis of received scattered Raman radiation; receiving s by a processing unit, the photo luminescence signal; generating, by the processing unit, different patterns of growth and/ or illumination for diamonds based on the photo luminescence signal; comparing, by the processing unit, generated patterns with predefined patterns of diamonds; and
  • Fig. 1 Shows block diagram of the apparatus for identifying synthetic diamonds in accordance to the present invention.
  • the apparatus for identifying synthetic diamonds of present invention includes a platform, a source of light, a filter, a photocell device and a processing unit.
  • the platform holds the diamonds to be identified.
  • the source of light emits a beam of monochromatic laser radiation of predetermined wavelength and irradiate the diamonds with the monochromatic laser radiation of predetermined wavelength.
  • the source of light is a low powered laser and/ or monochromatic laser source.
  • the source of radiation is a gas laser producing monochromatic radiation.
  • the predetermined wavelength is in the range of 190 to 550 nanometre.
  • the diamonds emits radiation as a result of irradiation with the monochromatic laser radiation.
  • the filter receives radiations emitted by the diamonds and allows passing of only scattered Raman radiation of frequency characteristics of the diamonds.
  • the filter is placed at right angle to the scattered beam of radiation.
  • the filter may comprise a thin glass slide having a suitable coating. Filters are characterized in terms of the wavelength of the incident radiation.
  • the photocell device detects and receives the scattered Raman radiation passed by the filter.
  • the photocell device generates photo luminescence signal for the diamond on the basis of received scattered Raman radiation.
  • the processing unit is operatively connected to the photocell device. The processing unit receives the photo luminescence signal and generates different patterns of growth and/ or illumination for diamonds based on the photo luminescence signal.
  • the processing unit compares generated patterns with predefined patterns of diamonds and identify whether diamond is synthetic or not based on the results of comparison.
  • the comparison result is displayed on a display.
  • Other details can also be made available on the display.
  • the predefined patterns are stored in a storage unit.
  • the storage unit is operatively coupled to the processing unit.
  • the apparatus may include a diaphragm to control the light emitted from the source of light.
  • a central database is provided which is operatively connected to the processing unit and configured to store the identification result of the diamonds for future use.
  • a single apparatus is explained for the ease. It may possible that a system may include plurality of such apparatuses which are connected to the central database.
  • the identification results obtained by all apparatuses are stored in central database. The results can be access through whole supply chain for validation and chain of custody.
  • the diamonds will be validated and connected to a central database.
  • the processing unit will generate Unique Identification number to each group of diamonds test or studded jewellery test via photocell signal. Validation is to be carried out through internet by gathering detail of an owner of that particular apparatus, location, processing unit name and number and or IP address.
  • the extension of the apparatus by mechanical arrangement to segregate synthetic diamonds from a group of natural diamonds in its loose format.
  • the present invention also provides a method for identifying synthetic diamonds with the use of above defined apparatus.
  • the method comprising of following steps:
  • Raman radiation h. receiving, by a processing unit, the photo luminescence signal; i. generating, by the processing unit, different patterns of growth and/or illumination for diamonds based on the photo luminescence signal; j. comparing, by the processing unit, generated patterns with predefined patterns of diamonds; and k. identifying, by the processing unit, whether diamond is synthetic or not based on the result of comparing step.

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  • 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

L'invention concerne un appareil d'identification de diamants synthétiques comprenant : une plateforme pour recevoir des diamants à identifier ; une source de lumière configurée pour émettre un faisceau de rayonnement laser monochromatique de longueur d'onde prédéterminée et rayonner sur les diamants ; un filtre configuré pour laisser passer uniquement un rayonnement Raman diffusé de caractéristiques fréquentielles des diamants parmi le rayonnement émis par les diamants, le filtre étant placé à angle droit par rapport au rayonnement ; un dispositif à cellule photoélectrique pour détecter et recevoir le rayonnement Raman diffusé ayant traversé le filtre, configuré pour générer un signal de photoluminescence pour le diamant sur la base du rayonnement Raman diffusé reçu ; et une unité de traitement reliée de façon fonctionnelle au dispositif à cellule photoélectrique, conçu pour recevoir le signal de photoluminescence et générer différents modèles de croissance et/ou d'éclairage pour des diamants sur la base du signal de photoluminescence, comparer des motifs générés avec des motifs prédéfinis de diamants ; et identifier si le diamant est synthétique sur la base des résultats de comparaison.
PCT/IN2016/000094 2015-11-19 2016-04-11 Appareil et procédé d'identification de diamants synthétiques WO2017085730A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN4358/MUM/2015 2015-11-19
IN4358MU2015 2015-11-19

Publications (1)

Publication Number Publication Date
WO2017085730A1 true WO2017085730A1 (fr) 2017-05-26

Family

ID=58718512

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2016/000094 WO2017085730A1 (fr) 2015-11-19 2016-04-11 Appareil et procédé d'identification de diamants synthétiques

Country Status (1)

Country Link
WO (1) WO2017085730A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799786A (en) * 1985-06-13 1989-01-24 The British Petroleum Company P.L.C. Method of diamond identification
US5883389A (en) * 1993-03-05 1999-03-16 Spear; Paul Martyn Distinguishing natural from synthetic diamonds
US20020008925A1 (en) * 1999-03-04 2002-01-24 Gemological Institute Of America, Inc. Gem identification viewer
US20130321792A1 (en) * 2012-06-04 2013-12-05 Frederick W. Shapiro Universal tool for automated gem and mineral identification and measurement
WO2015082985A1 (fr) * 2013-12-05 2015-06-11 Sahajanand Technologies Pvt Ltd. Détection de pierres précieuses synthétiques à l'aide d'un traitement d'image

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4799786A (en) * 1985-06-13 1989-01-24 The British Petroleum Company P.L.C. Method of diamond identification
US5883389A (en) * 1993-03-05 1999-03-16 Spear; Paul Martyn Distinguishing natural from synthetic diamonds
US20020008925A1 (en) * 1999-03-04 2002-01-24 Gemological Institute Of America, Inc. Gem identification viewer
US20130321792A1 (en) * 2012-06-04 2013-12-05 Frederick W. Shapiro Universal tool for automated gem and mineral identification and measurement
WO2015082985A1 (fr) * 2013-12-05 2015-06-11 Sahajanand Technologies Pvt Ltd. Détection de pierres précieuses synthétiques à l'aide d'un traitement d'image

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