CN1140792C - Raman identifying method for jewel mineral - Google Patents
Raman identifying method for jewel mineral Download PDFInfo
- Publication number
- CN1140792C CN1140792C CNB011084448A CN01108444A CN1140792C CN 1140792 C CN1140792 C CN 1140792C CN B011084448 A CNB011084448 A CN B011084448A CN 01108444 A CN01108444 A CN 01108444A CN 1140792 C CN1140792 C CN 1140792C
- Authority
- CN
- China
- Prior art keywords
- jewel
- raman
- mineral
- phonon
- jewel mineral
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a Raman identifying method for jewel minerals, which belongs to the technical field of jewel identification. In the present invention, circular-polarization incident and scattered light is used as scattering configuration to measure the Raman active phonons of a jewel mineral, phonon frequency is given in the magnitude order of scattering strength, and then, the phonon frequency is compared with that in the database of the jewel mineral provided by people to identify the measured jewel mineral. The present invention has the advantages of no destructivity, in-situ detection, high simplicity, high speed, high practicality, etc., and can be used for objectively and accurately identifying the jewel minerals and unknown crystals.
Description
The present invention relates to a kind of jewel mineral the Raman method of identification, belong to jewel mineral recognition technology field.
Traditional jewel mineral recognition methods has magnifier observation, surveys hardness, index of refraction, microscopic etc.These methods since only be the surface or incomplete, and parameter is single, so the detection degree of accuracy is low.Modern recognition methods has Electronic Speculum, X-ray, infrared spectrum etc.In these methods or to sample destruction is arranged, or be difficult to carry out micro-zone analysis.
In recent years, the professional person adopts micro-Raman technology, discerns the jewel mineral by mensuration by the vibrational spectra of the basic crystal structure decision of jewel mineral.Yet, know that from the Raman spectrum principle of crystal general whole Raman spectrums are measured needs two conditions to obtain.First is an independent perfect crystal, and along specific crystal orientation cutting, polishing.The secondth, select several scattering configurations by the crystal symmetry decision, do corresponding polarization Raman spectrum.This is difficult to accomplish in the jewel mineral identification of reality.Reason is: the first, and the jewel sample can not be cut and wear into such that the physicist requires, destroy its outward appearance and pattern aesthetic feeling.The second, repeatedly the scattering allocating and measuring also is time-consuming and high price.
The objective of the invention is to overcome the deficiency of prior art, and a kind of Raman method of identification of easy, quick and nondestructive jewel mineral is provided.
The present invention is achieved in that
Be based on the inelastic scattering of light and matter interaction with Raman optical spectrum method identification jewel mineral, the phonon that heat shock is initiated in photon and the material (quantum of crystal vibration) when taking place to interact in accordance with energy conservation:
ω
Loose=ω
λ± Ω (1)
ω
Loose, ω
λRepresent incident, scattering light frequency respectively, the phonon frequency in the crystal of Ω representative participation scattering.From (1) formula as can be known, as long as measure the difference on the frequency ω of incident, scattered light
Loose-ω
λJust measured the phonon of crystal.Because the structure difference of various crystal, every kind of crystal all has an own unique cover phonon, and in above-mentioned scattering process, wherein the phonon of Raman active all might be detected.Its scattering strength is observed
Wherein R ° is the Raman tensor of this phonon, and Ei, Es are respectively the electric vectors (polarization direction) of incident, scattered light.(2) formula shows that the different phonons of different crystal jewel mineral have different Raman tensors, and occurs under different incident lights, scatter light polarization are measured.So the not high crystal of symmetry will carry out the incident under the various configurations, the phonon spectrum that the scatter light polarization test could obtain its whole Raman actives.Just very difficult to the thorough identification of jewel mineral like this, and be impossible almost just to the lapidarist product of having chiseled.
At above-mentioned situation, the present invention adopts circularly polarized incident light, scattered light to measure the Raman active phonon of crystal jewel mineral, and the size according to scattering strength sorts then, and provides the frequency of phonon.By (2) formula as can be known, when incident, when scattered light is circularly polarized light, the scattering strength of Raman active phonon will have nothing to do to the relative orientation of crystal with incident, scattered light, and the active phonon of all Raman lights all can occur, and its scattering strength is only relevant with the basic parameter of crystal.Thereby can obtain whole Raman active phonon spectrums objectively, exactly.We have measured nearly 400 kinds of jewel mineral with this method, and provide the phonon frequency in proper order according to the intensity of first three highest peak, form the database of a jewel, mineral.The application program of database adopts the dialog mode window of prior art, and program comprises enquiry module, data module, user management module, authentication module and system management module.When needs are identified jewel mineral or any unknown crystal, as long as with Raman spectrum data (frequency, intensity, the halfwidth etc.) input database of being surveyed, computing machine only needed 20-30 minute can identify the jewel mineral of being surveyed, and showed the kind of the jewel mineral of surveying.
Accompanying drawing 1 is light path and the instrumentation diagram with the Raman spectrum of circularly polarized light test jewel sample.M-catoptron, L-focus lamp among the figure.
Accompanying drawing 2 is embodiment (topaz) Raman spectrums when linearly polarized light excites different polarization configuration down.
To be embodiment (topaz) excite Raman spectrum when placing sample arbitrarily down at circularly polarized light with accompanying drawing 3.
The invention will be further described below in conjunction with accompanying drawing:
Topaz is placed the instrument shown in the accompanying drawing 1, Raman active phonon with circularly polarized light test topaz, and provide the phonon frequency according to the size order of scattering strength, then with Raman spectrum data (frequency, intensity, halfwidth etc.) input database (the dialog mode window of being surveyed of the application program employing prior art of database, known program comprises enquiry module, data module, user management module, authentication module and system management module), computing machine only needed 20 minutes just can identify the jewel mineral of being surveyed, and showed the kind of the jewel mineral of surveying.
From accompanying drawing 2 as can be seen, it is different with the crystal relative orientation that linearly polarized light excites down its Raman spectrum to depend on the polarization of incident light direction, the polarisation of light difference, and resulting Raman spectrum especially relative intensity has a great difference.
From accompanying drawing 3 as can be seen, circularly polarized light excites down its Raman spectrum and crystal relative orientation to have nothing to do, therefore can utilize one or more feature Raman peaks with intensity ordering associated frequencies, compare by the database that provides with us, come the kind of unique definite crystal.
The present invention compared with prior art, but have do not have to destroy Site Detection, simple, fast, the advantage such as practicality, Can identify objective, exactly jewel mineral and unknown crystal.
Claims (1)
- A kind of Raman method of identification of jewel mineral, it is characterized in that adopting circularly polarized incident, scattered light to do the scattering configuration, record the Raman active phonon of jewel mineral, and provide the phonon frequency according to the size order of scattering strength, compare with jewel mineral database then, identify the jewel mineral of being surveyed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011084448A CN1140792C (en) | 2001-05-16 | 2001-05-16 | Raman identifying method for jewel mineral |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011084448A CN1140792C (en) | 2001-05-16 | 2001-05-16 | Raman identifying method for jewel mineral |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1385691A CN1385691A (en) | 2002-12-18 |
| CN1140792C true CN1140792C (en) | 2004-03-03 |
Family
ID=4657261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011084448A Expired - Fee Related CN1140792C (en) | 2001-05-16 | 2001-05-16 | Raman identifying method for jewel mineral |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1140792C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10663345B2 (en) | 2018-08-22 | 2020-05-26 | Paul Bartholomew | Raman spectroscopy for minerals identification |
| US10801963B2 (en) | 2018-08-22 | 2020-10-13 | Paul Bartholomew | Raman spectroscopy for minerals identification |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749158B (en) * | 2013-12-27 | 2020-12-11 | 同方威视技术股份有限公司 | Method and device for identifying jewelry jade |
| CN107462563A (en) * | 2016-06-02 | 2017-12-12 | 潘栋雄 | The method in the place of production bored using Raman spectrum identification A Gaier powder |
| CN108680557B (en) * | 2018-07-02 | 2021-02-19 | 山东大学 | Method for testing phonon anisotropy of SiC crystal based on polarized Raman spectrum |
| CN111107948B (en) * | 2019-12-27 | 2022-07-15 | 重庆康佳光电技术研究院有限公司 | Screening method and device for LED chips to be transferred |
| CN111398243A (en) * | 2020-04-02 | 2020-07-10 | 中南大学 | Optical fiber Raman system and method for on-line detection of grade of tungsten flotation concentrate |
| CN115060704B (en) * | 2022-07-27 | 2022-10-21 | 昆明理工大学 | Method for detecting methylmercury and aflatoxin B1 by surface enhanced Raman scattering |
-
2001
- 2001-05-16 CN CNB011084448A patent/CN1140792C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10663345B2 (en) | 2018-08-22 | 2020-05-26 | Paul Bartholomew | Raman spectroscopy for minerals identification |
| US10801963B2 (en) | 2018-08-22 | 2020-10-13 | Paul Bartholomew | Raman spectroscopy for minerals identification |
| US11181480B2 (en) | 2018-08-22 | 2021-11-23 | Paul Bartholomew | Raman spectroscopy for minerals identification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1385691A (en) | 2002-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Smith et al. | Modern Raman spectroscopy: a practical approach | |
| CN205384224U (en) | Raman spectroscopy measures experimental apparatus | |
| Eaton-Magaña et al. | An introduction to photoluminescence spectroscopy for diamond and its applications in gemology | |
| CN1140792C (en) | Raman identifying method for jewel mineral | |
| EP2021775B1 (en) | Method for obtaining spectral information | |
| WO2018038628A1 (en) | Device for identifying a diamond | |
| CN101995395A (en) | Laser induction multiple spectrum united fingerprint network online detecting material method | |
| CA2937696A1 (en) | Method of spectroscopic analysis of a diamond and apparatus thereof | |
| CN106053425A (en) | Raman spectrum gem and jade appraising device and method | |
| Barone et al. | A portable versus micro‐Raman equipment comparison for gemmological purposes: the case of sapphires and their imitations | |
| Culka et al. | Gem and mineral identification using GL gem raman and comparison with other portable instruments | |
| Urashima et al. | Micro-Raman spectroscopic analysis on natural carbonates: linear relations found via biaxial plotting of peak frequencies for cation substituted species | |
| McKeown et al. | Raman spectroscopy of silicate rings: benitoite and the three-membered ring | |
| Steinberg | [7] Circularly polarized luminescence | |
| Ma et al. | Single-cell discrimination based on optical tweezers Raman spectroscopy | |
| Geisler et al. | Raman spectroscopy in fossilization research | |
| Roberts et al. | Micro-Raman spectroscopy in the earth sciences | |
| White | Identification of cave minerals by Raman spectroscopy: new technology for non-destructive analysis | |
| Lehnig et al. | Structure and Dynamics of Phthalocyanine− Argon n (n= 1− 4) Complexes Studied in Helium Nanodroplets | |
| Xu et al. | Raman spectroscopic investigation of zircon in gem‐quality sapphire: Application in origin determination | |
| Tsai et al. | Rapid gemstone mineral identification using portable Raman spectroscopy | |
| RU2765213C1 (en) | Device for diagnostic stones in jewelry | |
| JP2850856B2 (en) | Interface analysis method | |
| RU2435158C1 (en) | Method of analysing cut precious stones | |
| Dao et al. | Raman micro-spectrometry and its applications to the identification of inclusions in natural rubies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |