CA2418858A1 - Detection de diamant par spectroscopie raman anti-stokes coherente - Google Patents

Detection de diamant par spectroscopie raman anti-stokes coherente Download PDF

Info

Publication number
CA2418858A1
CA2418858A1 CA002418858A CA2418858A CA2418858A1 CA 2418858 A1 CA2418858 A1 CA 2418858A1 CA 002418858 A CA002418858 A CA 002418858A CA 2418858 A CA2418858 A CA 2418858A CA 2418858 A1 CA2418858 A1 CA 2418858A1
Authority
CA
Canada
Prior art keywords
particle
diamond
laser beams
initial laser
initial
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.)
Abandoned
Application number
CA002418858A
Other languages
English (en)
Inventor
George William Over
Hendrik Gerhard Coenraad Human
Narendra Balagury Viranna
Nicholaas Johannes Adolf Lubbe
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
Individual
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 Individual filed Critical Individual
Publication of CA2418858A1 publication Critical patent/CA2418858A1/fr
Abandoned legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • B07C5/3425—Sorting according to other particular properties according to optical properties, e.g. colour of granular material, e.g. ore particles, grain
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/44—Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
    • 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65—Raman scattering
    • 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
    • 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65—Raman scattering
    • G01N2021/653—Coherent methods [CARS]

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

L'invention concerne un procédé et un appareil permettant de détecter des diamants par spectroscopie Raman anti-Stokes cohérente (CARS). Chaque particule (46) à analyser est irradiée au moyen d'un faisceau d'irradiation (44) de particules focalisé de lumière laser formé par combinaison de faisceaux laser (35, 36) initiaux possédant des fréquences différant les unes des autres d'une caractéristique de valeur pour un diamant. Les composants des faisceaux laser sont adaptés en phase de manière cohérente afin de produire une caractéristique de signal CARS du diamant dans les particules dudit diamant. Le signal dispersé à partir des particules est ensuite collecté et analysé afin de déterminer la présence du signal de caractéristique CARS. Le faisceau d'irradiation et/ou au moins le faisceau laser initial est focalisé au moyen d'un système de lentille comprenant une lentille cylindrique. On a découvert que cette caractéristique permettait d'améliorer les résultats par rapport à une analyse CARS classique.
CA002418858A 2000-08-11 2001-08-08 Detection de diamant par spectroscopie raman anti-stokes coherente Abandoned CA2418858A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA200004111 2000-08-11
ZA2000/4111 2000-08-11
PCT/IB2001/001415 WO2002014837A2 (fr) 2000-08-11 2001-08-08 Detection de diamant par spectroscopie raman anti-stokes coherente

Publications (1)

Publication Number Publication Date
CA2418858A1 true CA2418858A1 (fr) 2002-02-21

Family

ID=25588860

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002418858A Abandoned CA2418858A1 (fr) 2000-08-11 2001-08-08 Detection de diamant par spectroscopie raman anti-stokes coherente

Country Status (3)

Country Link
AU (2) AU2001276600B2 (fr)
CA (1) CA2418858A1 (fr)
WO (1) WO2002014837A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112012014789A2 (pt) * 2009-12-17 2019-09-24 British Columbia Cancer Agency Branch aparelho e método para caracterização de tecido, e, meio legível por computador.
CN105642566B (zh) * 2016-03-03 2018-04-06 布勒索特克斯光电设备（合肥）有限公司 一种色选机滤镜自动更换装置
CN106053425A (zh) * 2016-05-10 2016-10-26 南京理工大学 一种拉曼光谱宝玉石鉴定装置及方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784275A (en) * 1986-09-15 1988-11-15 Vanzetti Systems Inc. Verification systems for small objects
GB2280956B (en) * 1991-02-20 1995-08-30 Gersan Ets Classifying or sorting
CA2241470C (fr) * 1997-06-26 2005-06-21 De Beers Consolidated Mines Limited Detection des diamants a l'aide de la diffusion raman anti-stokes coherente
ZA985496B (en) * 1997-06-26 1999-01-20 De Beers Cons Mines Ltd Diamond detection using coherent anti-stokes raman spectroscopy

Also Published As

Publication number Publication date
AU2001276600B2 (en) 2005-05-19
AU7660001A (en) 2002-02-25
WO2002014837A2 (fr) 2002-02-21
WO2002014837A3 (fr) 2002-05-02

Similar Documents

Publication Publication Date Title
US4284897A (en) Fluorescence determining microscope utilizing laser light
US4195913A (en) Optical integration with screw supports
JP5832412B2 (ja) 光学系及びレーザ加工装置
US6259055B1 (en) Apodizers for laser peening systems
JPH11138896A (ja) レーザを用いたマーキング方法、マーキング装置、及びマークの観察方法、観察装置
JPH04171415A (ja) 長焦点深度高分解能照射光学系
US7440088B2 (en) Methods and devices for measuring a concentrated light beam
AU2001276600B2 (en) Diamond detection using coherent anti-stokes raman spectroscopy
WO2018097018A1 (fr) Dispositif de traitement laser et procédé de traitement laser
US20040125441A1 (en) Microscopic imaging apparatus with flat-top distribution of light
AU2001276600A1 (en) Diamond detection using coherent anti-stokes raman spectroscopy
JP2003340588A (ja) 透明材料内部の処理方法およびその装置
ZA200300671B (en) Diamond detection using coherent anti-Stokes Raman spectroscopy.
JP6972670B2 (ja) レーザ加工装置
JP3169354B2 (ja) レーザ溶接加工モニタリング装置
US6676264B1 (en) Laser beam focusing apparatus and method for focusing a laser beam
JP2000227576A (ja) レーザ加工装置用出射光学系
US20020167672A1 (en) Holographic particle-measuring apparatus
KR101972884B1 (ko) 용융 신호 검출 시스템 및 이를 포함하는 웨이퍼 열처리 장치
TWI582407B (zh) 粒子三維定位與追蹤裝置及其方法
JPS6015528A (ja) レ−ザビ−ム特性測定方法
CA2241470C (fr) Detection des diamants a l'aide de la diffusion raman anti-stokes coherente
GB2254444A (en) Laser microscopy
JP2002340804A (ja) マークの観察方法及び観察装置
RU98112329A (ru) Способ обнаружения алмазов с использованием когерентной анти-стоксовой рамановской спектроскопии и устройство для его реализации

Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued