发明名称 |
METHOD AND APPARATUS FOR EXAMINING AN OBJECT |
摘要 |
In order to examine a gemstone, the stone is irradiated and observed through a filter at a first wavelength which is characteristic of a first class of gemstones. The filter can be rocked from a setting normal to the optical axis to transmit radiation of at least one reference wavelength. The intensities of radiation transmitted at the first and reference wavelengths are observed and compared, to classify the gemstone as belonging to the first class or not. In order to detect whether the gemstone is a diamond or a diamond simulants, the first wavelength comprises Raman emission characteristic of diamond. In order to detect whether the gemstone is definitely natural or not definitely natural, the gemstone is classified as definitely natural if there is a maximum of absorption of radiation at 415.5nm.
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申请公布号 |
CA2081347(C) |
申请公布日期 |
2002.06.11 |
申请号 |
CA19912081347 |
申请日期 |
1991.04.24 |
申请人 |
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发明人 |
SMITH, MARTIN PILLIP;SMITH, ROBIN WYNCLIFFE;WELBOURN, CHRISTOPHER MARK |
分类号 |
G01N21/65;G01N21/31;G01N21/87;(IPC1-7):G01N21/87;B07C5/342 |
主分类号 |
G01N21/65 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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