Journal of the European Optical Society - Rapid publications, Vol 7 (2012)

Wear recording at micro deep drawing tools with comparative digital holography

S. Huferath-von Luepke, P. Huke, C. von Kopylow, R. B. Bergmann


We present a method to record the wear on samples of micro deep drawing tools. The method is based on the basic idea of comparative holography and captures three dimensionally the surface of the tool in the initial state and compares it with used state after processing several parts. The comparison reveals scratches and other effects caused by wear. In an industrial environment the comparative method must compensate for linear and rotational displacement of the present tool with respect to the initial state. As a consequence to the single-step-measurement with sufficiently high illumination intensity the developed set-up can be made insusceptible against stray light and the method is capable of inline quality control during a production process in a micro deep drawing machine.

© The Authors. All rights reserved. [DOI: 10.2971/jeos.2012.12041]

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