Nondestructive testing device for identifying authenticity of pearl

Abstract

The invention relates to a nondestructive testing device for identifying authenticity of a pearl. The nondestructive testing device is characterized by comprising a halogen tungsten lamp source, an optical fiber spectroscope, mechanical components for fixing the optical fiber spectroscope, a fixing component, a manual mobile platform in vertical direction, mechanical components for fixing the manual mobile platform, an optical platform in vertical direction, an optical fiber connection plate, a lens, a reference lens, a PZT motor, an NI card, a directional manual mobile platform, turbinate cup components used for loading the pearl to be tested, a directional automatic mobile scanning platform and a controller thereof, a near-infrared spectrometer and a computer, wherein the fixing component is provided with the optical fiber connection plate and the lens; the NI card is used for controlling the PZT motor. The nondestructive testing device can two-dimensionally scan the pearl and can imagine the internal structure of the pearl. The nondestructive testing device not only can identify real and fake pearls, but also can identify natural seawater pearls or freshwater cultured pearls, and has high test precision.

Description

technical field [0001] The invention belongs to the technical field of jewelry identification and photoelectric non-destructive testing, and in particular relates to a non-destructive testing device for pearl authenticity identification. Background technique [0002] Pearl is known as the "Queen of Gems" for its gorgeous "jewelry" and elegant and pure character. At present, there are many fake pearls appearing on the market, seriously affecting the order of the market and the consumption value of consumers. Existing true and false pearl identification methods mainly contain following three kinds: experience method, destructive method and non-destructive method. Empirical methods are mainly represented by hand feeling method, teeth bite method, intuition method and sniffing method. In many occasions, it is difficult to accurately identify; destructive methods include cutting and grinding observation, soaking in acetone solution, cross-sectional scanning electron microscopy,...

AI Technical Summary

Problems solved by technology

For non-destructive methods, represented by X-rays, natural seawater pearls (nucleated pearls) and freshwater cultured pearls (non-nucleated pearls) can be visually identified, but X-rays have strong radiation to the human body. Its radiation safety must be considered; in addition, X-ray exposure may change some of the physical structure and chemical properties of pearls, which may affect the value of precious pearls

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