G
Gerd Gülker
Researcher at University of Oldenburg
Publications - 59
Citations - 495
Gerd Gülker is an academic researcher from University of Oldenburg. The author has contributed to research in topics: Speckle pattern & Electronic speckle pattern interferometry. The author has an hindex of 12, co-authored 57 publications receiving 435 citations.
Papers
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Journal ArticleDOI
Hydration of MgSO4·H2O and Generation of Stress in Porous Materials
Michael Steiger,Kirsten Linnow,Herbert Juling,Gerd Gülker,Akram El Jarad,Stefan Brüggerhoff,Dirk Kirchner +6 more
TL;DR: In this article, an experimental study of the isothermal hydration of MgSO4·H2O, kieserite, in porous glass filters with different in situ techniques, i.e., X-ray diffraction under controlled conditions of temperature and humidity, scanning electron microscopy after cryofixation of samples, and electronic speckle pattern interferometry.
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Corrosion monitoring with speckle correlation
TL;DR: A quantitative relation between the decorrelation of the scattered light fields and the rate of corrosion is established in a theoretical model, based on the statistics of phase and reflectivity changes of point scatterers at the surface.
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Speckle correlation for the analysis of random processes at rough surfaces
TL;DR: In this paper, the speckle field scattered from the surface is used as information carrier and its change is measured by correlation, and the reliability of the quantitative interpretation of the specckle decorrelation is demonstrated.
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Checkup for aging artwork—Optical tools to monitor mechanical behaviour
TL;DR: In this paper, the scope of modern coherent metrology can be adapted to this aim and the proper optical methods become an ideal tool for restorers and conservators, the more as they are nonintrusive and remotely applicable.
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Deformation mapping and surface inspection of historical monuments
TL;DR: In this article, the authors applied ESPI in various configurations (reference beam or shear) as well as double exposure speckle photography for deformation monitoring in historical monuments.