CN108918504A - The system and method for Gemstone Identification is realized based on Raman spectrum and OCT - Google Patents
The system and method for Gemstone Identification is realized based on Raman spectrum and OCT Download PDFInfo
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- 239000010437 gem Substances 0.000 title claims abstract description 38
- 229910001751 gemstone Inorganic materials 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001237 Raman spectrum Methods 0.000 title claims abstract description 24
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 32
- 238000005516 engineering process Methods 0.000 claims abstract description 26
- 239000011521 glass Substances 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000004458 analytical method Methods 0.000 claims abstract description 8
- 230000001427 coherent effect Effects 0.000 claims abstract description 6
- 238000003384 imaging method Methods 0.000 claims abstract description 4
- 238000004364 calculation method Methods 0.000 claims abstract 2
- 230000001788 irregular Effects 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000003786 synthesis reaction Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 4
- 238000013075 data extraction Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 claims 1
- 238000005457 optimization Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000001228 spectrum Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 239000010929 jewellery material Substances 0.000 abstract 1
- 230000000704 physical effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 239000002131 composite material Substances 0.000 description 5
- 239000010432 diamond Substances 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 4
- 101000572981 Homo sapiens POU domain, class 3, transcription factor 1 Proteins 0.000 description 3
- 102100021543 Solute carrier family 22 member 16 Human genes 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000003325 tomography Methods 0.000 description 2
- 101100188554 Arabidopsis thaliana OCT5 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- 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
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- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
本发明公开了一种基于拉曼光谱和光学相干成像（OCT）技术实现宝石鉴定的系统及方法，所述系统包括：宝石样品、载玻片、暗盒、移动平台、拉曼光谱仪、OCT、数据提取与处理模块、显示器，所述暗盒包括两个透光孔；所述方法包括：首先运用OCT通过透光孔获取载玻片空载时的空载图像，再分别运用OCT与拉曼光谱仪对放置在载玻片上的样品进行检测以获取样品光谱图与OCT图像；利用计算机软件分析图像，以获取样品边界和距离信息，并通过光程匹配原理完成折射率的计算，分析拉曼谱图得到样品化学性质；最终测量结果通过显示器显示。本系统和方法设计简单、操作简便、对同一样品实现测量的快速切换；实现了不规则珠宝材料的物理属性（光学折射率）和化学成分等多指标的测量与综合分析；同时本方法实现了宝石不同断层的光学折射率的自动化、数字化、智能化测量。
The invention discloses a system and method for gemstone identification based on Raman spectroscopy and optical coherent imaging (OCT) technology. The system includes: gemstone samples, glass slides, cassettes, mobile platforms, Raman spectrometers, OCT, data The extraction and processing module and the display, the cassette includes two light holes; the method includes: firstly using OCT to obtain an empty image of the glass slide through the light holes, and then using OCT and a Raman spectrometer to The sample placed on the glass slide is detected to obtain the sample spectrum and OCT image; the image is analyzed by computer software to obtain the sample boundary and distance information, and the calculation of the refractive index is completed through the optical path matching principle, and the Raman spectrum is analyzed to obtain Sample chemistry; final measurement results are shown on the display. The system and method are simple in design, easy to operate, and can quickly switch the measurement of the same sample; the measurement and comprehensive analysis of multiple indicators such as the physical properties (optical refractive index) and chemical composition of irregular jewelry materials are realized; at the same time, the method realizes Automatic, digital and intelligent measurement of optical refractive index of different faults of gemstones.
Description
Technical field
The present invention relates to Gemstone Identification fields, more particularly to one kind is based on Raman spectrum and OCT measurement jewel physics refraction
The System and method for of rate and chemical component property.
Background technique
The authenticity of jewel be in real life it is particularly important, wherein refractive index is an extremely important identification
Index, measurement method include prism method, Polarization Method（Test Brewster's angle）, contact pin method, Abbe refractometer method, also include light
It learns coherent imaging technology (OCT).
OCT is the new skill of a kind of quick, high-resolution and the highly sensitive high-resolution tomography image for obtaining sample
Art has been widely used in biologic medical and material tests, and detection method is also extremely easy, only material need to be directly put
Set in scanning range, can be obtained the OCT image comprising material characteristics information, measurement it is the simplest directly, be it is a kind of quickly,
Detect the new technique of refractive index.
Jewelry, ore refractive index can thus measure, but thus much an appraisal basis is relatively simple, especially rolls in sample
It penetrates in situation similar in rate, is difficult to distinguish gem materials, it is therefore necessary to enrich corresponding identification of indicator；And Raman spectrum skill
Art is as a kind of mature technology, using " molecular fingerprint " characteristic of Raman spectrum, can screen different chemical composition, and its conduct
A kind of sxemiquantitative and non-quantitation technology, are difficult accurate quantification different chemical composition content, and refractive index can make up it is such
Defect, therefore the combination of two kinds of technologies can play bigger power, form more comprehensive to jewelry ore materials, comprehensive analysis knot
Fruit and report.
Apparatus of the present invention realize the combination of above-mentioned technology, and the physics and chemical property of jewelry ore materials can be achieved at the same time
It measures, obtains and the comprehensive evaluating of jewel is identified, and detection is easy, quick, accurate.
Summary of the invention
It is a kind of precious based on Raman spectrum and OCT technology realization object of the present invention is to provide in view of the defects existing in the prior art
The System and method for of stone identification, measurement while physics and chemical property to realize jewelry ore materials, obtains to jewel
Comprehensive evaluating and identification, and detection is easy, quick, accurate.
In order to achieve the above object, the present invention adopts the following technical scheme that：
A kind of system that Gemstone Identification is realized based on Raman spectrum and OCT technology, including Gem Samples, glass slide, magazine, movement
Platform, Raman spectrometer, OCT, data, which are extracted, includes two loopholes with processing module, display, the magazine.
Further, the Raman spectrometer wavelength model is optional, for measuring the Raman spectral information of Gem Samples；Institute
State that OCT wavelength model is optional, principle is the light that issues of low-coherence light source after fiber optic splitter, uniformly it is divided into two beams,
Reference arm and sample arm are respectively enterd, the reference light returned by the reflected sample light of sample and mirror reflection is again through light
Fine beam splitter phase dry doubling is coupled on detector, herein for OCT figure in surface when obtaining glass slide zero load (for always in image
Line, referred to as baseline) with place sample when Sample Scan figure.
Preferably, the sample is the jewel of surfacing.
Preferably, the slide thickness is 1 ~ 2mm, measures unloaded image and placement sample for providing OCT.
Preferably, the magazine provides environmental requirement for Raman spectrometer and OCT measurement, extraneous interference is avoided, into one
With walking, the light of loophole there are two the magazine tops, Raman spectrometer and OCT are via herein into magazine.
Further, the mobile platform is for placing glass slide and sample, and horizontal can at the uniform velocity drag platform for drawing
The scanning of graceful spectrometer and OCT to sample.
Preferably, the data extract the synthesis for carrying out unloaded figure and sample drawing with computer software with processing module,
And optimize through median filtering, Boundary Recognition is carried out using canny operator, utilizes Hough transform (Hough
Transformation Straight Line Identification) is carried out to each interface of composite diagram, the distance feature between the straight line of acquisition, according to light path
Sample refractive index is calculated automatically with principle, and analysis raman spectrum obtains sample chemical property.
Further, the display is for showing final gem properties measurement result.
A method of Gemstone Identification is realized based on Raman spectrum and OCT technology, is included the following steps：
A, baseline image when first with OCT by loophole acquisition glass slide zero load；Use OCT and Raman spectrum respectively again
Instrument detects the sample being placed on glass slide, i.e., at the uniform velocity drags mobile platform, makes Raman spectrometer and OCT successively to sample
Product, which are scanned, obtains sample Raman spectrogram and OCT image；
B, using two image of computer software analysis, to obtain sample boundaries and characteristic information, and it is public by light path matching principle
Formula completes the calculating of refractive index, and the analysis of chemical property is completed by Raman spectrum；
C, final measurement is shown by display.
The beneficial effects of the invention are as follows：（1）This system realizes Raman spectroscopy and two kinds of optical coherence imaging technique
The combination of technology, reducing two kinds, technology space separation bring operation is constant and resource is overlapped.
（2）This method by computer software by arithmetic programming realize jewel difference tomography light refractive index from
Dynamicization, digitlization, intelligent measuring.
（3）Apparatus of the present invention and method, design is simple, and integration ofTechnology degree is high, easy to operate, while having given full play to two kinds
The qualitative and quantitative complementarity of measuring technique, to quickly, accurately, systematically complete jewelry, the common physics of ore and change
Learn the comprehensive analysis and identification of property.
Detailed description of the invention
Attached drawing 1 is system and device schematic diagram of the invention.
Attached drawing 2 is measuring method flow chart provided by the invention.
Attached drawing 3 is Method And Principle schematic diagram provided by the present invention.
Attached drawing 4 is a kind of jewel embodiment Raman spectrogram provided by the invention.
Attached drawing 5 is a kind of jewel embodiment OCT figure provided by the invention, composite diagram.
Attached drawing 6 is the interaction figure provided by the invention using 5 composite diagram of attached drawing after algorithm process.
In figure, 1- sample 2- glass slide 3- magazine 301-OCT loophole 302- Raman spectrometer loophole 4- is mobile
Platform 5-OCT 6- Raman spectrometer 7- data are extracted and processing module 8- display.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specifically real
Applying example, the invention will be further described, so that those skilled in the art can better understand technical solution of the present invention,
But the embodiment of invention is without being limited thereto.
As shown in Figure 1, for a kind of system and device schematic diagram for realizing Gemstone Identification based on Raman spectrum and OCT technology, packet
Gem Samples 1, glass slide 2, magazine 3, mobile platform 4, Raman spectrometer 5, OCT6, data are included to extract and processing module 7, display
Device 8, the magazine include two loopholes 301,302.
It is illustrated in figure 2 a kind of method stream that Gemstone Identification is realized based on Raman spectrum and OCT technology provided by the invention
Cheng Tu includes the following steps：
A, the mobile platform 4 for not placing sample 1 is placed in 301 lower section of loophole, sky when starting OCT6 acquisition glass slide 2 is unloaded
Baseline chart is carried, later places the Gem Samples of surfacing 1, places it in 302 lower section of loophole, then at the uniform velocity dragging is mobile flat
Platform 4, is respectively started Raman spectrometer 5 and OCT6 scanning obtains the Raman spectrum and OCT image of sample 1；
B, scanning figure acquired in two instruments is uploaded to data extraction and processing module 7 through data line connection, used here
Computer software carries out the synthesis of unloaded figure and sample drawing, and optimizes through median filtering, carries out boundary knowledge using canny operator
Not, Hough transform is utilized（Hough Transformation）Straight Line Identification carried out to each interface of composite diagram, acquisition it is straight
Distance feature between line；If Straight Line Identification is ineffective, it may be programmed and realize same scan line（Dotted line as shown in Figure 3）With it is upper
The manual interaction of lower boundary, baseline intersection point is chosen, and completes various point locations information（The coordinate value being primarily referred to as on image）It extracts,
Sample refractive index is calculated according to light path matching principle automatically afterwards, analysis raman spectrum obtains sample chemical property；
C, final result is connected to display 8 by data line and is shown.
It should be noted that wherein can realize the measurement to sample refractive index, principle such as Fig. 3 based on light path matching principle
It is shown：The light path matching principle and the corresponding faultage image location information of physics light path that OCT coherent measurement requires：Place sample
Before, i.e., when objective table is vacant, its tomograph is scanned, the position of stage surface is y in figure0（As baseline position）；It is carrying
It after placing sample on object platform, is tightly attached to the lower surface of sample on objective table, carries out longitudinal scanning（At Fig. 3 algorithm process figure
p0~p4It is shown）；In Sample Scan tomograph, if the position of sample upper surface is y1, the lower surface of sample is for position in figure
y2If sample refractive index is n, then have, then by respective image processing technique described above, extract respective distance
Parameter（y0, y1, y2）, refractive index can be calculated by substituting into formula.
If Fig. 4 is a kind of Raman spectrogram of Gem Samples diamond embodiment provided by the present invention, feature spectral peak is
1300cm-1 is consistent by Raman spectrum analysis with known diamond embodiment standard feature peak, and the mirror of corresponding chemical ingredient is completed
It is fixed.
As shown in Figure 5,6, Fig. 5 is the OCT figure and composite diagram of above-mentioned diamond embodiment provided by the invention；Fig. 5 (a) is benefit
The baseline chart of acquisition is scanned to vacant objective table with OCT technology；Fig. 5 (b) is using OCT technology to being placed on objective table
Diamond be scanned the sample drawing of acquisition；Fig. 5 (c) is the synthesis of the baseline chart and sample drawing realized by programming；Fig. 6 is to close
At digital picture identify that the interaction figure on boundary is scanned along longitudinal direction by the boundary identified through Hough transform（p0~p4）, fortune
Multiple groups up-and-down boundary distance and coboundary are obtained to parallax range parameter value i.e. with algorithmWith, light is substituted into afterwards
Journey matching principle formula, and statistical disposition test result.The measuring sample refractive index is that 2.412 ± 0.013 (known this is pure
2.417) driller's industry standard refraction rate is.
In conclusion more preferred separate embodiment used herein a kind of is based on Raman to provided by the present invention
Spectrum and OCT technology realize that the System and method for of Gemstone Identification is expounded, and the explanation of above example is only intended to help
Understand method and core concept of the invention, it is noted that although having carried out in detail referring to aforementioned separate embodiment to the present invention
Illustrate, but to those skilled in the art, without departing from the principle of the present invention, several change can also be made
Into and retouching, these modifications and embellishments are also considered to be within the scope of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811059554.3A CN108918504A (en) | 2018-09-12 | 2018-09-12 | The system and method for Gemstone Identification is realized based on Raman spectrum and OCT |
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| CN201811059554.3A CN108918504A (en) | 2018-09-12 | 2018-09-12 | The system and method for Gemstone Identification is realized based on Raman spectrum and OCT |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132933A (en) * | 2019-05-09 | 2019-08-16 | 上海大学 | A device and method for stably collecting surface-enhanced Raman spectroscopy signals |
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