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Proceedings Paper

A versatile optical profilometer based on conoscopic holography sensors for acquisition of specular and diffusive surfaces in artworks
Author(s): Nicola Gaburro; Giacomo Marchioro; Claudia Daffara
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Paper Abstract

Surface metrology of artworks requires the design of suitable devices for in-situ non-destructive measurement together with reliable procedures for an effective analysis of such non-engineered variegate objects. To advance the state-of-the-art it has been implemented a versatile optical micro-profilometry taking advantage of the adapt- ability of conoscopic holography sensors, able to operate with irregular shapes and composite materials (diffusive, specular, and polychrome) of artworks. The scanning technique is used to obtain wide field and high spatially resolved areal profilometry. The prototype has a modular scheme based on a set of conoscopic sensors, extending the typical design based on a scanning stage and a single probe with a limited bandwidth, thus allowing the collection of heights data from surface with different scales and materials with variegate optical response. The system was optimized by characterizing the quality of the measurement with the probes triggered in continuous scanning modality. The results obtained on examples of cultural heritage objects (2D paintings, 3D height-relief) and materials (pictorial, metallic) demonstrate the versatility of the implemented device.

Paper Details

Date Published: 11 July 2017
PDF: 9 pages
Proc. SPIE 10331, Optics for Arts, Architecture, and Archaeology VI, 103310A (11 July 2017); doi: 10.1117/12.2270307
Show Author Affiliations
Nicola Gaburro, Univ. degli Studi di Verona (Italy)
Giacomo Marchioro, Univ. degli Studi di Verona (Italy)
Claudia Daffara, Univ. degli Studi di Verona (Italy)

Published in SPIE Proceedings Vol. 10331:
Optics for Arts, Architecture, and Archaeology VI
Luca Pezzati; Piotr Targowski, Editor(s)

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