CN1385691A - Raman identifying method for jewel mineral - Google Patents
Raman identifying method for jewel mineral Download PDFInfo
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- CN1385691A CN1385691A CN 01108444 CN01108444A CN1385691A CN 1385691 A CN1385691 A CN 1385691A CN 01108444 CN01108444 CN 01108444 CN 01108444 A CN01108444 A CN 01108444A CN 1385691 A CN1385691 A CN 1385691A
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- raman
- jewel
- mineral
- gem
- phonon
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- 239000010437 gem Substances 0.000 title claims abstract description 33
- 229910001751 gemstone Inorganic materials 0.000 title claims abstract description 33
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 29
- 239000011707 mineral Substances 0.000 title claims abstract description 29
- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000013078 crystal Substances 0.000 abstract description 21
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000001066 destructive effect Effects 0.000 abstract 1
- 238000001237 Raman spectrum Methods 0.000 description 11
- 230000010287 polarization Effects 0.000 description 6
- WKBPZYKAUNRMKP-UHFFFAOYSA-N 1-[2-(2,4-dichlorophenyl)pentyl]1,2,4-triazole Chemical compound C=1C=C(Cl)C=C(Cl)C=1C(CCC)CN1C=NC=N1 WKBPZYKAUNRMKP-UHFFFAOYSA-N 0.000 description 4
- 239000011031 topaz Substances 0.000 description 4
- 229910052853 topaz Inorganic materials 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
- 238000001845 vibrational spectrum Methods 0.000 description 1
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
本发明涉及一种宝石矿物的拉曼识别法,属宝石识别技术领域。本发明采用圆偏振的入射、散射光做散射配置,测得宝石矿物的拉曼活性声子,并按照散射强度的大小顺序给出声子频率,然后与我们提供的宝石矿物数据库相比较,识别出所测的宝石矿物。具有无破坏、可现场检测、简单、快速、实用等优点,可客观、准确地识别宝石和未知晶体。The invention relates to a Raman identification method for gem minerals, belonging to the technical field of gem identification. The present invention uses circularly polarized incident and scattered light as scattering configurations to measure the Raman active phonons of gem minerals, and gives the phonon frequencies according to the order of scattering intensity, and then compares them with the gem mineral database provided by us to identify Gem minerals measured. It has the advantages of non-destructive, on-site detection, simplicity, speed, and practicality, and can objectively and accurately identify gemstones 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
R wherein
ΩBe the Raman tensor of this phonon, 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 | A Raman Identification Method of Gem Minerals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011084448A CN1140792C (en) | 2001-05-16 | 2001-05-16 | A Raman Identification Method of Gem Minerals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1385691A true CN1385691A (en) | 2002-12-18 |
| CN1140792C CN1140792C (en) | 2004-03-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011084448A Expired - Fee Related CN1140792C (en) | 2001-05-16 | 2001-05-16 | A Raman Identification Method of Gem Minerals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1140792C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749158A (en) * | 2013-12-27 | 2015-07-01 | 同方威视技术股份有限公司 | Jade jewelry appraisal method and device thereof |
| CN107462563A (en) * | 2016-06-02 | 2017-12-12 | 潘栋雄 | Method for identifying producing area of Algal powder diamond by using Raman spectrum |
| CN108680557A (en) * | 2018-07-02 | 2018-10-19 | 山东大学 | One kind is based on polarization Raman spectrum to the anisotropic test method of SiC crystal phonon |
| CN111107948A (en) * | 2019-12-27 | 2020-05-05 | 重庆康佳光电技术研究院有限公司 | A 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 |
| CN115060704A (en) * | 2022-07-27 | 2022-09-16 | 昆明理工大学 | Method for detecting methylmercury and aflatoxin B1 by surface enhanced Raman scattering |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10801963B2 (en) | 2018-08-22 | 2020-10-13 | Paul Bartholomew | Raman spectroscopy for minerals identification |
| US10663345B2 (en) | 2018-08-22 | 2020-05-26 | Paul Bartholomew | Raman spectroscopy for minerals identification |
-
2001
- 2001-05-16 CN CNB011084448A patent/CN1140792C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749158A (en) * | 2013-12-27 | 2015-07-01 | 同方威视技术股份有限公司 | Jade jewelry appraisal method and device thereof |
| WO2015096780A1 (en) * | 2013-12-27 | 2015-07-02 | 同方威视技术股份有限公司 | Method and device for identifying jewellery and gems |
| US10036707B2 (en) | 2013-12-27 | 2018-07-31 | Nuctech Company Limited | Gem identification method and apparatus |
| CN107462563A (en) * | 2016-06-02 | 2017-12-12 | 潘栋雄 | Method for identifying producing area of Algal powder diamond by using Raman spectrum |
| CN108680557A (en) * | 2018-07-02 | 2018-10-19 | 山东大学 | One kind is based on polarization Raman spectrum to the anisotropic test method of SiC crystal phonon |
| CN108680557B (en) * | 2018-07-02 | 2021-02-19 | 山东大学 | A test method for phonon anisotropy of SiC crystal based on polarized Raman spectroscopy |
| CN111107948A (en) * | 2019-12-27 | 2020-05-05 | 重庆康佳光电技术研究院有限公司 | A 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 |
| CN115060704A (en) * | 2022-07-27 | 2022-09-16 | 昆明理工大学 | Method for detecting methylmercury and aflatoxin B1 by surface enhanced Raman scattering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1140792C (en) | 2004-03-03 |
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