Low-coherence ESPI in the investigation of ancient terracotta warriors

Gerd Gulker; Arne Kraft

doi:10.1117/12.516576

27 May 2003 Low-coherence ESPI in the investigation of ancient terracotta warriors

Gerd Gulker, Arne Kraft

Proceedings Volume 4933, Speckle Metrology 2003; (2003) https://doi.org/10.1117/12.516576
Event: Speckle Metrology 2003, 2003, Trondheim, Norway

Abstract

In order to investigate deterioration processes in the paint layers on the famous 2000-yr-old Chinese Terracotta warriors, a low coherence ESPI system was designed. In this modified set-up a short-coherent superluminescence diode instead of a laser is used. By changing the path length of one of the interfering beams it is possible to select a region limited in depth where deformations are measured even if it is below the surface. Results on an artificial test object and on original terracotta fragments demonstrate the limits and the capabilities of the new method.

Citation Download Citation

Gerd Gulker and Arne Kraft "Low-coherence ESPI in the investigation of ancient terracotta warriors", Proc. SPIE 4933, Speckle Metrology 2003, (27 May 2003); https://doi.org/10.1117/12.516576

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