DOI Artikel:
Hinsch, Klaus: Laseroptik am Baudenkmal - ein Beitrag zum Erhalt steinerner Kulturgüter
DOI Seite / Zitierlink:https://doi.org/10.11588/diglit.50505#0050
Verbundprojekten „Steinzerfall’’ und „Schäden an Wandmalereien"
gefördert.
3 Einzelheiten zur Lasergranulation siehe I. C. Dainty (ed.): Laser
Speckle and Related Phenomena. Berlin 1975.
4 K. Hinsch / K. Wolff, In: Bautenschutz und Bausanierung 11, 1988,
S. 97.
5 R. Jones / C. Wykes: Holographie and Speckle Interferometry.
Cambridge 1983.
6 G. Gülker et al., In: Proc. SPIE 952, 1989, S. 68-74.
7 Die Spaltzugexperimente an Steinproben wurden wesentlich unter-
stützt durch A. Löhr und G. Sevade von der Forschungs- und
Materialprüfanstalt (FMPA) des Landes Baden-Württemberg,
Stuttgart.
8 Die Experimente mit Steinersatzmassen wurden unter maßgebli-
cher Beteiligung von A. Boue vom Institut für Bauforschung IBAC
der Technischen Hochschule Aachen durchgeführt.
Abbildungsnachweis
Verfasser.
Summary
For centuries, climatic cycles and man-made influences acting
on stone monuments produce deformations of the building
materials that result in their final disintegration. The systematic
study of deterioration mechanisms requires measurement of
these tiny displacements to reveal how the different external
factors contribute to the decay, and to trace any weak spot
that occur in single stones as well as in compound structural
components. Laser techniques like speckle interferometry or
holography provide excellent means to map displacement
fields when the deformations are in the order of the light
wavelength (about 1 micron, i.e. 1/iooo mm). Problems arise
when such measurements must be made in situ at the monu-
ment since background movements or vibrations conceal the
effects completely as soon as the assume this order of mag-
nitude. A special method of video-holography (electronic
speckle pattern interferometry, ESPI) has been adapted to
meet this task. It provides equipment that can easily be
brought to any monument for long-term monitoring of its
deformations. Examples are being shown that reveal crack
formations in loaded stone samples and shrinking processes
in stone substitutes, and that demonstrate the daily cyclic
response of plastered walls to the interior climate in the church
of Eilsum in Northern Germany.
48
gefördert.
3 Einzelheiten zur Lasergranulation siehe I. C. Dainty (ed.): Laser
Speckle and Related Phenomena. Berlin 1975.
4 K. Hinsch / K. Wolff, In: Bautenschutz und Bausanierung 11, 1988,
S. 97.
5 R. Jones / C. Wykes: Holographie and Speckle Interferometry.
Cambridge 1983.
6 G. Gülker et al., In: Proc. SPIE 952, 1989, S. 68-74.
7 Die Spaltzugexperimente an Steinproben wurden wesentlich unter-
stützt durch A. Löhr und G. Sevade von der Forschungs- und
Materialprüfanstalt (FMPA) des Landes Baden-Württemberg,
Stuttgart.
8 Die Experimente mit Steinersatzmassen wurden unter maßgebli-
cher Beteiligung von A. Boue vom Institut für Bauforschung IBAC
der Technischen Hochschule Aachen durchgeführt.
Abbildungsnachweis
Verfasser.
Summary
For centuries, climatic cycles and man-made influences acting
on stone monuments produce deformations of the building
materials that result in their final disintegration. The systematic
study of deterioration mechanisms requires measurement of
these tiny displacements to reveal how the different external
factors contribute to the decay, and to trace any weak spot
that occur in single stones as well as in compound structural
components. Laser techniques like speckle interferometry or
holography provide excellent means to map displacement
fields when the deformations are in the order of the light
wavelength (about 1 micron, i.e. 1/iooo mm). Problems arise
when such measurements must be made in situ at the monu-
ment since background movements or vibrations conceal the
effects completely as soon as the assume this order of mag-
nitude. A special method of video-holography (electronic
speckle pattern interferometry, ESPI) has been adapted to
meet this task. It provides equipment that can easily be
brought to any monument for long-term monitoring of its
deformations. Examples are being shown that reveal crack
formations in loaded stone samples and shrinking processes
in stone substitutes, and that demonstrate the daily cyclic
response of plastered walls to the interior climate in the church
of Eilsum in Northern Germany.
48