Optical characterization of an object

A dual optical detection system with diffused and collimated light sources and a multi-view CNN algorithm effectively addresses the challenge of detecting inclusions and cracks in gemstones, enhancing classification accuracy.

GB2701122APending Publication Date: 2026-04-22DE BEERS UK LTD
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Patent Information

Authority / Receiving Office
GB · GB
Patent Type
Applications
Current Assignee / Owner
DE BEERS UK LTD
Filing Date
2022-12-20
Publication Date
2026-04-22

AI Technical Summary

Technical Problem

Existing methods for classifying gemstones, such as diamonds, struggle to accurately detect inclusions and cracks, which affect their quality, due to interference from reflections and diffractions at outer surfaces.

Method used

A dual optical detection system using diffused and collimated light sources, combined with circular polarizers, to distinguish between reflections from outer surfaces and internal inclusions or cracks, and a multi-view CNN algorithm for enhanced classification.

Benefits of technology

Improves the detection of inclusions and cracks in gemstones by enhancing signal-to-noise ratio and enabling precise classification based on optical imaging and machine learning.

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Abstract

An optical characterisation system for characterising a gemstone 10, the system comprising: a first optical detection apparatus, comprising a first sample chamber 400, a diffused light source 41 and a
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Citation Information

Patent Citations

  • Process and system for diamond clarity measurement

    US20210033540A1

  • Gemstone sorting apparatus and methods

    US5193685A

  • Inclusion detection in polished gemstones

    WO2011054822A1