Surface topology investigation for ancient coinage assessment using optical interferometry

Autor:	C. Raepsaet, E. Paris, S. Lesko, J.L. Pastol, R.I. Grynszpan
Rok vydání:	2004
Předmět:	Interferometry Optics business.industry media_common.quotation_subject White light General Materials Science General Chemistry Art Ancient history business Effigy Analysis method media_common
Zdroj:	Applied Physics A. 79:273-276
ISSN:	1432-0630 0947-8396
DOI:	10.1007/s00339-004-2531-3
Popis:	In order to demonstrate the capabilities of white-light interferometry depth profiling (WLI-DP) for ancient coinage assessment, we investigated a series of notorious 1786 gold coins, bearing Louis XVI’s ‘horned’ effigy, and allegedly minted in Strasbourg. Scanning electron microscopy as well as WLI-DP observations unambiguously indicate that both previously differentiated ‘single’- and ‘double’-horned varieties originated from a unique minting tool. Moreover, from topological measurements, we infer that ‘single-horned’ coins, rather than wearing out into ‘double-horned’ coins, proceeded from the latter variety during minting by progressive failure of an already altered die. Whereas present observations do not exclude initial forgery, they suggest that protrusions resulted from progressive incidental in-service die deterioration.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::11194e77462b67452da9ca2afae5b190 https://doi.org/10.1007/s00339-004-2531-3 Zobrazit plný text záznamu Plný text ve formátu PDF