High-accuracy 3D optical profilometry for analysis of surface condition of modern circulated coins
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Author(s)
Type
Journal Article
Abstract
The article shows that noncontact measurement techniques can be an important support to X-ray-based methods when examining the surface condition of modern circulated coins. The forms and degrees of wear of such coins, affecting their utility values, qualifying them as a legal tender in a given country, can be measured and analyzed, among other things, using advanced high-accuracy optical profilometry methods. The authors presented four analyses carried out for reverses and obverses of round coins (1 zloty, 1 franc, 50 bani, 5 pens) characterized by different degrees of surface wear. All of the coins were measured using 3D optical profilometers (Talysurf CLI 2000 and S neox) representing two generations of these types of systems. The obtained results confirm the validity of the applied high-accuracy measurement systems in conjunction with dedicated software in the presented applications. Examples of the analyses carried out can be a significant source of information on the condition of coins in the context of maintaining their functional properties (selection of appropriate wear–resistant alloys and correctness of the production process).
Date Issued
2020-11-26
Date Acceptance
2020-11-23
Citation
Materials, 2020, 13 (23)
ISSN
1996-1944
Publisher
MDPI
Journal / Book Title
Materials
Volume
13
Issue
23
Copyright Statement
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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Subjects
circulated coins
measurements and analysis
optical methods
surface condition
03 Chemical Sciences
09 Engineering
Publication Status
Published
Article Number
5371