Digital speckle pattern interferometry for the condition surveys of painted wood: Monitoring the altarpiece in the church in Hedalen, Norway

Mobile depth profiling and sub-surface imaging techniques for historical paintings—A review

“…The capabilities of the techniques were recently demonstrated in an in-situ study of the influence of changed climatic conditions induced by a heating system on a painted wooden altar in Norway, employing Speckle decorrelation and EPSI [168]. A similar study highlighted the capability of HI to evaluate defects created (or healed) in a painting during transport to an exhibitions and restoration treatments [171].…”

“…A kind of defect that, as opposed to cracks, is difficult to detect with the established imaging techniques XRR and IRR and is commonly studied by the visual observation of slight irregularities in the surface of a painting. Further, the so called percussion method has been described, in that the sound emitted by the painting upon a slightly tapping on the surface is interpreted [22,168]. The investigation of cultural heritage objects by NDT has been reviewed a few years ago [20].…”

Digital holographic interferometry for cultural heritage structural diagnostics: A coherent and a low‐coherence optical set‐up for the study of a marquetry sample

“…Furthermore, a lot of work has been devoted to the investigation of renowned structures with digital holographic and speckle methods. Examples include the condition surveys and analysis of a wooden altarpiece in the church of Hedalen, Norway, or the examination of panel paintings . Digital holographic speckle pattern interferometry (DHSPI) is a technique based on holographic interferometry and electronic speckle pattern interferometry and allows for a full‐field and contactless visualisation of large areas, for examining surface displacements associated with subsurface discontinuities, exploiting the unique optical properties of laser radiation, such as the very narrow spectral width and the high temporal and spatial coherence …”

Study of the Effect of the Strategy of Heating on the Mudejar Church of Santa Maria in Ateca (Spain) for Preventive Conservation of the Altarpiece Surroundings

“…In particular, recent works in the literature [ 2 , 18 , 19 ] analyse the influence of RH and temperature on the state of conservation of altarpieces located in churches. In [ 18 ], triangulation laser displacement sensors were applied to the continuous in situ monitoring of the response of wooden altarpiece in the church of Santa Maria Maddalena in Rocca Pietore, Italy, to fluctuations in temperature and relative humidity caused by the use of a heating system.…”