Extending hyperspectral imaging from Vis to NIR spectral regions: a novel scanner for the in-depth analysis of polychrome surfaces

Costanza Cucci; Andrea Casini; Marcello Picollo; Lorenzo Stefani

doi:10.1117/12.2020286

30 May 2013 Extending hyperspectral imaging from Vis to NIR spectral regions: a novel scanner for the in-depth analysis of polychrome surfaces

Costanza Cucci, Andrea Casini, Marcello Picollo, Lorenzo Stefani

Author Affiliations +

Proceedings Volume 8790, Optics for Arts, Architecture, and Archaeology IV; 879009 (2013) https://doi.org/10.1117/12.2020286
Event: SPIE Optical Metrology 2013, 2013, Munich, Germany

Abstract

In recent years Hyper-Spectral Imaging (HSI) technologies have become well-established for applications in the field of Cultural Heritage, and in particular for non-invasive analysis and high quality documentation of paintings and other polychrome surfaces. This paper reports on the latest developments of the on-going research at IFAC-CNR, where a new prototype of a high-performance hyper-spectral scanner, operating in the NIR spectral region (900-1700nm range), was designed, assembled and tested. This new NIR scan-head was designed to be mounted on the same mechanical structure used for the earlier IFAC-CNR scanner prototype, which operated in the 400-900nm range. As ultimate goal the whole system would be intended to provide 2D hyper-spectral data on the extended 400-1700nm range, so as to strongly improve the capability of pigment discrimination, and to increase the possibility of visualizing the underlying features of the polychrome surfaces (such as under-drawings, pentimenti, etc.). In the present version, the NIR scan-head operates with a spectral sampling rate of about 2 nm, and a spatial sampling rate of about 9 dots per millimeter. The results of testing and characterization of the new high resolution NIR IFAC-CNR scanner are presented, with a focus on the main technical problems tackled in customizing the new system for the investigation and documentation of paintings.

Citation Download Citation

Costanza Cucci, Andrea Casini, Marcello Picollo, and Lorenzo Stefani "Extending hyperspectral imaging from Vis to NIR spectral regions: a novel scanner for the in-depth analysis of polychrome surfaces", Proc. SPIE 8790, Optics for Arts, Architecture, and Archaeology IV, 879009 (30 May 2013); https://doi.org/10.1117/12.2020286

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