Optical and fast nondestructive identification of the ages of leaded ancient pottery

doi:10.1088/1674-1056/21/5/057803

Abstract In this paper, based on the one-dimensional (1D) optical superlattice model, we calculate the average reflectivities (ARs) of leaded ancient pottery (AP) made within the last 2000 years, and find that for incident light with a suitable wavelength, the AR of the leaded AP increases monotonously with the increase in the layer number of the silvery glaze (SG) media. Based on this property, we propose an optical nondestructive method for identifying the age of leaded AP by detecting the AR. By using the exhaust algorithm and the discriminant function of variance, we obtain the optimal wavelength range of the incident light to identify the ages of the leaded AP. It is found that in the visible light band, if we choose green light with a wavelength range of 540--540.1 nm as the incident light, leaded AP made within the last 2000 years can be identified swiftly and precisely by detecting the ARs. This will be useful for designing optical instruments for the fast nondestructive identification of the ages of leaded AP.

Keywords: optical superlattice ancient pottery nondestructive identification

Received: 11 October 2011
Revised: 27 April 2012
Accepted manuscript online:

PACS:	78.67.Pt	(Multilayers; superlattices; photonic structures; metamaterials)
	68.60.-p	(Physical properties of thin films, nonelectronic)
	42.25.Bs	(Wave propagation, transmission and absorption)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10974061).

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Wu Fang-Yuan (吴方媛) and Yang Xiang-Bo(杨湘波) Optical and fast nondestructive identification of the ages of leaded ancient pottery 2012 Chin. Phys. B 21 057803

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Optical and fast nondestructive identification of the ages of leaded ancient pottery

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