IL253531B - Method and system for determining location of stresses in a diamond - Google Patents
Method and system for determining location of stresses in a diamondInfo
- Publication number
- IL253531B IL253531B IL253531A IL25353117A IL253531B IL 253531 B IL253531 B IL 253531B IL 253531 A IL253531 A IL 253531A IL 25353117 A IL25353117 A IL 25353117A IL 253531 B IL253531 B IL 253531B
- Authority
- IL
- Israel
- Prior art keywords
- diamond
- model
- location
- stress
- computer
- Prior art date
Links
- 239000010432 diamond Substances 0.000 title claims description 90
- 229910003460 diamond Inorganic materials 0.000 title claims description 85
- 238000000034 method Methods 0.000 title claims description 37
- 238000001514 detection method Methods 0.000 claims description 21
- 238000007654 immersion Methods 0.000 claims description 21
- 230000010287 polarization Effects 0.000 claims description 17
- 238000005286 illumination Methods 0.000 claims description 10
- 238000013507 mapping Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims 4
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims 1
- 238000003384 imaging method Methods 0.000 claims 1
- 230000003993 interaction Effects 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 claims 1
- 229910052711 selenium Inorganic materials 0.000 claims 1
- 239000011669 selenium Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
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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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/87—Investigating jewels
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F1/00—Compounds containing elements of Groups 1 or 11 of the Periodic Table
-
- 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
- G01N21/21—Polarisation-affecting properties
-
- 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
- G01N21/88—Investigating the presence of flaws or contamination
-
- 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
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
- G01N2021/8848—Polarisation of light
Landscapes
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Organic Chemistry (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
METHOD AND SYSTEM FOR DETERMINING LOCATION OF STRESSES IN A DIAMOND BACKGROUND Stress (or strain or tension - all synonyms) in diamonds is a phenomenon inherent in the growth of the different Carbon layers of the diamond, whether man made diamond or a natural one.Stress in diamonds can create many difficulties for the diamond manufacturers, among which but not solely are those involved in producing a finished diamond from a rough stone, including planning how to the rough stone is to be cut/sawn e.g. by a laser, into 2 or more pieces and providing polishing considerations.The Applicant and the inventors of the presently disclosed subject matter are not aware of any process or machine performing 3D mapping of diamonds and of stresses therein, and presentation of such stresses, if any, in a 3D model , and the presently disclosed subject matter is directed to such process and machine which are expected to make the manufacturing and processing of diamonds a more secure process allowing the manufacturer to plan his steps through all the manufacturing process.For the sake of good order it needs to be indicated that there exists a manual method, which uses a polariscope for viewing stresses in diamonds but such viewing is not mapping locations of the stresses, i.e. providing their map as a file with the applied resolution, and it does not allow to automatically determine the locations and presenting them in a 3D model of the diamond.
BACKGROUND ART - WO2007/023444- WO2008/102361 GENERAL DESCRIPTION The presently disclosed subject matter concerns a method and system for detecting stresses in a diamond and, more particularly, determining the location of at least one stress area, if any, in a diamond.
The method according to one aspect of the presently disclosed subject matter is to be performed on a diamond disposed in an immersion medium, and it includes providing illumination including a wavelength, at which the immersion medium can have a refractive index substantially matching that of the diamond; polarizing this illumination by a polarizer and illuminating therewith the diamond within the immersion medium; passing light which exits the diamond and the immersion medium through a polarization analyzer; detecting the light that has passed through the analyzer and determining location of at least one stress area within the diamond based on this detection.If an image, that is obtained based on the detected light, has substantially no dark areas, namely the polarized light did not change its polarization while propagating through the diamond and the immersion medium, it can be concluded that the diamond is free of stresses. Whilst if the image has dark areas (areas through which light did not pass or passed only partially), this can serve as an indication that the diamond might have at least one stressed area. Since the change of polarization can happen not only due to stresses within the diamond but also due to inclusions, the method of the presently disclosed subject matter can comprise an inclusion detection step performed in any known manner, before or after the above stress detection, to exclude the influence of inclusions on the polarized light during the stress detection, and a final decision on the location of the at least one stress in the diamond is made based on the results of the stress detection and inclusion detection.The polarizer and the analyzer can be aligned one to another such that they both are configured to pass light having the same polarization. In this case, when the polarized light propagates through a stressed area and inclusions within the diamond, if any, it will change its polarization and will be blocked by the analyzer, allowing only the light that has passed through the diamond in areas that are clean from stresses and inclusions to exit the diamond and the immersion medium with about the same polarization as it entered thereto.The detection of the light exiting the analyzer can be performed by a detection system including light collection optics, a camera, to which the light collection optics is configured to direct that light and a processor. The camera is being capable of detecting light having the wavelength mentioned above and produce signals responsive thereto, which signals are then processed by the processor to determine the location of at least one stress in the diamond.
The location of the stresses in the diamond is determined as described above relative to a predefined system of coordinates, and the method can further comprise 3D mapping of the exterior surface of the diamond, when free from the immersion medium, to produce its 3D model within the same or correlated system of coordinates, in which case the method can result in producing a 3D model of the diamond with the determined stresses shown therein.The above method can be carried out from at least two perspectives relative to the diamond. By one example, the method can be carried out in at least two rotational positions of the diamond about a vertical axis of rotation passing through the optical axis. The diamond can be held within the immersion medium by a holder so as to allow its rotation within the immersion medium, or it can be rotated together with the immersion medium, about the vertical axis of rotation to allow the diamond within the immersion medium to be illuminated from a plurality of different perspectives. In order to distinguish the stressed areas from the inclusions in this case, the inclusion detection can be performed at the same rotational positions of the diamond and with the same illumination as in the stress detection, though without using the polarizer and analyzer. It should be noted that the method can be carried out by other ways of tomography known in the art that do not require rotation of the diamond, e.g. using a confocal microscope.Another aspect of the presently disclosed subject matter also includes a system for determining location of at least one stress in a diamond as described above, comprising a detection area configured for mounting thereon the diamond within the immersion medium so that the system's optical axis passes through the detection area, an illumination source and the polarizer disposed on one side of the detection area, the polarization analyzer and the detection system disposed on the other side of the detection area, all being arranged along said optical axis. The polarizer and the polarization analyzer are rotatable around the optical and axis and also removable from the optical axis when it is desired to capture a non-polarized image.The system can further comprise means for rotating the diamond with or within the immersion medium. The system can further be configured to produce a 3D model of the diamond including the stresses, based on a 3D map of the exterior surface of the diamond produced externally and received by the system processor or produced by the system. In the latter case, the system can comprise a 3D mapping device via which the diamond can be conveyed prior to its insertion into the immersion medium, for producing a 3D map of its exterior surface. Such device can be any known diamond 3D mapping device. The 3D model can optionally include also the inclusions within the diamond along with the stressed areas.The stress detection of the present invention, as well as the inclusion detection, can be performed in a system, which is similar to that described in in WO 2008/102361, whose description from these publication is incorporated herein by reference, with added thereto the polarizer positioned between the illumination source and the immersion medium with the diamond, and the analyzer positioned between the immersion medium with the diamond and the detection system.In another aspect of the present invention is provided a method for generating a 3D model of a diamond comprising 3D mapping of the diamond configured for producing a 3D model of its external surface, determining location of stress areas in the diamond, if any, and generating a 3D model of the diamond with the representation of stress areas therein relative to the external surface of the diamond.In some embodiments the method further comprising determining location of inclusions in the diamond.In some other embodiments of the method, the determination of location of the stress areas comprises taking into account the location of inclusions.In yet some other embodiments of the method, the 3D model with the representation of stress areas further comprises representation of the inclusions.In yet some other embodiments of the method, the determination of location of stress areas and inclusions is performed when the diamond is disposed within an immersion medium having a refractive index substantially matching that of the diamond.In yet another embodiment the 3D mapping of the diamond configured for producing a 3D model of its external surface is performed when the diamond is free of the immersion medium.In another aspect of the present invention is provided a 3D model of a diamond that is obtainable by the above described methods.
BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the subject matter that is disclosed herein and to exemplify how it may be carried out in practice, embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which: Fig. 1A-1Bshow a top view of a schematic illustration of two embodiments of a system of the present invention. Fig. 2A-2Cshow exemplary images of a diamond captured in a system of the present invention. Figs. 2A-2Bshow images of a diamond captured in configurations of the system wherein the polarizer is offset by 0° and 20° respectively. Fig. 2Cshows an image that is a combination of the images of Fig. 2A-2B . Fig. 3A-3Bshow exemplary presentations of the stressed areas within the diamond of Figs. 2A-2C .
DETAILED DESCRIPTION OF EMBODIMENTS
Claims (21)
1./2 - 10 - CLAIMS: 1. A method for determining a location of a stress in a diamond within an immersionmedium , the method comprising:(a) providing an illumination comprising at least one wavelength at which the immersion medium having a refractive index substantially matching that of the diamond;(b) polarizing the illumination and illuminating the diamond therewith;(c) passing the illumination exiting from the diamond through a polarization analyzer, wherein the polarization analyzer is configured to transmit light having about the same polarization of that obtained in step (b);(d) detecting the illumination passing the polarization analyzer; and(e) determining a location of at least one stress within the diamond based on the detected illumination.
2. The method of claim 1, wherein steps (b)-(e) are performed with respect to two ormore perspectives of the diamond. .
3. The method of claims 1 or 2, comprising:(f) generating a 2D or 3D model of the diamond including the indication of the stresses therein.
4. The method of any one of the preceding claims, comprising further determiningintensity of the stresses.
5. The method of any one of the preceding claims, comprising further using data ofa non-polarized imaging of the diamond for the determination of the location of the at least one stress within the diamond.
6. The method of claim 5, wherein the data of the non-polarized imagingcorresponds to mapping of inclusions in said diamond.
7. The method of any one of the preceding claims, wherein the medium comprisesselenium.
8. A system for determining stresses in a diamond located within an immersionmedium, the system comprising:a detection area comprising the diamond; 02502161158-01 253531/2 - 11 -a light source configured to illuminate light that comprises at least one wavelength at which the immersion medium having a refractive index substantially matching that of the diamond;a polarizer positioned between the light source and the diamond;a polarization analyzer positioned between the diamond and a detector, the detector is configured to detect at least said wavelength; wherein,the light source, the polarizer, the detection area, the polarization analyzer and the detector are arranged along an optical axis; andthe polarizer and the polarization analyzer are configured to transmit light having about the same polarization.
9. The system of claim 8, wherein the polarizer and the polarization analyzer arelinear polarizers.
10. The system of claims 8 or 9, further comprising a processor configured for processing the captured images to obtain at least one 2D image or a 3D model of the diamond comprising a presentation of the at least one stress.
11. The system of any one of the claims 8 to 10, wherein the detection area is rotatable about a vertical axis that is normal to the optical axis.
12. The system of any one of the claims 8 to 11, wherein the medium comprises selenium.
13. A method for generating a 3D model of a diamond, the method comprising: 3D mapping of the diamond and producing a 3D model of the diamond's external surface; determining location of stress areas in the diamond, if any, by the method of any one of the claims 1 to 7; and generating a 3D model of the diamond with the representation of stress areas therein relative to the external surface of the diamond.
14. The method of Claim 13, further comprising determining location of inclusions in the diamond.
15. The method of Claim 14, wherein the determination of location of the stress areas comprises taking into account the location of inclusions.
16. The method of Claim 14, wherein the 3D model of the diamond with the representation of stress areas therein further comprises representation of the inclusions. 02502161158-01 253531/2 - 12 -
17. The method of any one of the Claims 13 to16, wherein the 3D mapping of the diamond and producing a 3D model of the diamond's external surface is performed when the diamond is free of immersion medium.
18. The method of any one of the Claims 1 to 7, 13 to 16, wherein the determination of location of stress areas is performed using a system of any one of Claims 8 to 12.
19. A computer program product comprising a computer useable medium having computer readable program code embodied therein, the computer program product comprising a computer readable program code for causing the computer to execute a 3dimensional interactive model of a diamond, the model comprising data indicative of location of stress areas and, optionally, inclusions within the diamond, wherein the stress areas and inclusions are obtained by the method of any one of the claims 1 to 7 or 13 to 18.
20. The computer program product according to claim 19, wherein said computer readable program code further causing the computer to display the model on a computer display device.
21. The computer program product according to claim 20, wherein said computer readable program code further causing the computer to display the model on a computer display devicewhile enabling user interaction with the model via a user interface. 02502161158-01
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL253531A IL253531B (en) | 2017-07-17 | 2017-07-17 | Method and system for determining location of stresses in a diamond |
| PCT/IL2018/050784 WO2019016800A1 (en) | 2017-07-17 | 2018-07-16 | Method and system for determining location of stresses in a diamond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL253531A IL253531B (en) | 2017-07-17 | 2017-07-17 | Method and system for determining location of stresses in a diamond |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL253531A0 IL253531A0 (en) | 2017-09-28 |
| IL253531B true IL253531B (en) | 2022-07-01 |
Family
ID=62454929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL253531A IL253531B (en) | 2017-07-17 | 2017-07-17 | Method and system for determining location of stresses in a diamond |
Country Status (2)
| Country | Link |
|---|---|
| IL (1) | IL253531B (en) |
| WO (1) | WO2019016800A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090147241A1 (en) * | 2005-08-22 | 2009-06-11 | Galatea Ltd. | Method for evaluation of a gemstone |
| WO2016092300A1 (en) * | 2014-12-09 | 2016-06-16 | Peter Reischig | A method of generating a fingerprint for a gemstone using x-ray imaging |
| DE102015105944A1 (en) * | 2015-04-17 | 2016-10-20 | Max Kobbert | An imaging method for detecting individual features of diamonds using polarized light and an apparatus for performing the method |
-
2017
- 2017-07-17 IL IL253531A patent/IL253531B/en unknown
-
2018
- 2018-07-16 WO PCT/IL2018/050784 patent/WO2019016800A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090147241A1 (en) * | 2005-08-22 | 2009-06-11 | Galatea Ltd. | Method for evaluation of a gemstone |
| WO2016092300A1 (en) * | 2014-12-09 | 2016-06-16 | Peter Reischig | A method of generating a fingerprint for a gemstone using x-ray imaging |
| DE102015105944A1 (en) * | 2015-04-17 | 2016-10-20 | Max Kobbert | An imaging method for detecting individual features of diamonds using polarized light and an apparatus for performing the method |
Also Published As
| Publication number | Publication date |
|---|---|
| IL253531A0 (en) | 2017-09-28 |
| WO2019016800A1 (en) | 2019-01-24 |
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