Damage monitoring in historical murals by speckle interferometry

Autor:	Klaus D. Hinsch, Gerd Gülker, Holger Joost
Rok vydání:	2003
Předmět:	Speckle pattern Engineering Noise suppression business.industry Electronic speckle pattern interferometry Emphasis (telecommunications) Speckle noise Speckle imaging Sensitivity (control systems) Ultrasonography business Remote sensing
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.524885
Popis:	In the conservation of historical murals it is important to identify loose plaster sections that threaten to fall off. Electronic speckle interferometry in combination with acoustic excitation of the object has been employed to monitor loose areas. To avoid disadvantages of high sound irradiation of the complete building a novel directional audio-sound source based on nonlinear mixing of ultrasound has been introduced. The optical system was revised for optimum performance in the new environment. Emphasis is placed on noise suppression to increase sensitivity. Furthermore, amplitude and phase data of object response over the frequency-range inspected are employed to gain additional information on the state of the plaster or paint. Laboratory studies on sample specimen supplement field campaigns at historical sites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9ef9e58c1e369ff45fd26ee7c1bcf9fc https://doi.org/10.1117/12.524885 Zobrazit plný text záznamu