Raman spectrum-based diamond rapid detection method and device

Abstract

The invention relates to a Raman spectrum-based diamond rapid detection method and a device. According to the Raman spectrum-based diamond rapid detection method, a diamond sample is delivered into a scanning zone for one-dimensional code scanning and photographing; the diamond sample in delivered into a diamond sample collecting and fixing device, and is fixed in a diamond locating hole; the diamond sample is irradiated by laser through an objective lens of a spectrometer, and feedback of molecular structure information of the diamond sample in the mode of Raman spectrum to a computer is realized; analysis of the Raman spectrum is carried out, the characteristic peak of diamond is detected at 1331cm<-1>; if the characteristic peak is not observed, the diamond sample is not diamond; if the characteristic peak is observed, smoothing of the Raman spectrum is carried out so as to remove the diamond characteristic peak, full spectrum peak detection is carried out, if characteristic peaks are observed, the diamond sample is artificial diamond, if characteristic peaks are not observed, the diamond sample is natural diamond. The Raman spectrum-based diamond rapid detection method is capable of distinguishing natural diamond from artificial diamond rapidly and accurately; operation is simple; no requirement on the size of the sample is promoted; the Raman spectrum-based diamond rapid detection method can be used for detecting diamond of different particle diameter; one-touch operation is realized; millisecond-grade detection speed is achieved; and the Raman spectrum-based diamond rapid detection method is especially suitable for batch detection.

Description

technical field [0001] The invention relates to the field of diamond detection, in particular to a rapid diamond detection method and device using Raman spectroscopy. Background technique [0002] The emergence of synthetic diamonds has caused great trouble to the entire field of diamond testing. First of all, the daily inspection volume of top international appraisal institutions is very large, and some institutions even inspect more than 10,000 diamonds per day; secondly, the relevant institutions have a considerable capacity to produce synthetic diamonds, and there are even some potential synthetic diamond production unknown to the industry. ability. Not only that, but there are also many synthetic diamonds on the market, especially those with small fractions. [0003] Raman spectroscopy is a molecular structure characterization technology based on the Raman effect. The position, number and intensity of its spectral peaks directly reflect the molecular structure informa...

AI Technical Summary

Problems solved by technology

[0004] The existing diamond detection technology mainly focuses on UV-visible absorption spectroscopy and photoluminescence spectroscopy. The sensitivity of UV-visible absorption spectroscopy is low, and some weak signals cannot be measured, and reference correction is required. The reference sheet is easy to be dirty and easily leads to errors. The measurement spot is too large to test small diamonds

Photoinduced spectroscopy requires liquid nitrogen to cool down, the conditions are relatively harsh, and the operation process is complicated

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