Apparatus for determining the shape of a gemstone
US7436498B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2006 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Jul 10, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for determining the shape of a gemstone, including irregularities on its surface, is provided, The apparatus comprises a platform adapted to support the gemstone, a scanning system adapted to provide geometrical information concerning the three-dimensional convex envelope of the gemstone, an illumination system adapted to project on the gemstone a plurality of laser beams, an imaging system adapted to capture reflections of at least a part of said laser beams from the surface of the gemstone, and a processor. The processor is adapted to calculate, based on said geometrical information, a predicted reflection of each laser beam, to compare the captured reflections with said predicted reflections and to relate each captured reflection to its corresponding predicted reflection, to determine said shape of the gemstone based on the comparison and said geometrical information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.