Single-frame evaluation of object-adapted fringes

Tobias Haist; Ernst Ulrich Wagemann; Hans J. Tiziani

doi:10.1117/12.361000

9 September 1999 Single-frame evaluation of object-adapted fringes

Tobias Haist, Ernst Ulrich Wagemann, Hans J. Tiziani

Proceedings Volume 3823, Laser Metrology and Inspection; (1999) https://doi.org/10.1117/12.361000
Event: Industrial Lasers and Inspection (EUROPTO Series), 1999, Munich, Germany

Abstract

We present two fast methods for the evaluation of object- adapted fringe images. One method, a fast and simple skeleton method, is purely digital. The method is stable against varying object reflectivities and illumination conditions. We also demonstrate the optical evaluation of object-adapted fringe images by means of a moire technique. This second method uses a Ronchi grating for the optical processing of the images in order to detect topographic defects with high speed. Additionally, we present a new method for the generation of object-adapted fringe masks where only a few images have to be recorded in order to obtain the mask.

Citation Download Citation

Tobias Haist, Ernst Ulrich Wagemann, and Hans J. Tiziani "Single-frame evaluation of object-adapted fringes", Proc. SPIE 3823, Laser Metrology and Inspection, (9 September 1999); https://doi.org/10.1117/12.361000

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