Method of generating a fingerprint for a gemstone using x-ray imaging
US11073488B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 9, 2015 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | May 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The fingerprint comprises a three-dimensional map of internal imperfections present in a crystal within the gemstone (5), and may also comprise further information about the gemstone (5). The method comprises scanning the gemstone in an imaging apparatus by recording diffraction and/or extinction images according to a scanning strategy, and generating a fingerprint from the recorded diffraction and/or extinction images. The imaging apparatus comprises a sample holder (4), a sample stage (3), a detector (6), an x-ray source (1), wherein the sample holder (4) is movable relative to the x-ray source (1) and the detector (6). The fingerprint is used for the identification of gemstones, and/or for tracking and/or processing of gemstones in a supply chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.