Fast and flexible shape control with adaptive LCD fringe masks

Martin Schoenleber; Hans J. Tiziani

doi:10.1117/12.281188

17 September 1997 Fast and flexible shape control with adaptive LCD fringe masks

Martin Schoenleber, Hans J. Tiziani

Proceedings Volume 3098, Optical Inspection and Micromeasurements II; (1997) https://doi.org/10.1117/12.281188
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

Fast analysis of 3D shape deviations is obtained with fringe projection combined with moire filtering. A method is presented where an object adapted fringe mask is written in a matrix LCD and projected onto the test object. The object is detected by a CCD camera. Perfect objects yield regular fringe patterns. shape deviations results in distorted fringes. For moire filtering the periodic structure of the detecting CCD chip is exploited, therefore no image postprocessing is required, testing at video frame rate is possible.

Citation Download Citation

Martin Schoenleber and Hans J. Tiziani "Fast and flexible shape control with adaptive LCD fringe masks", Proc. SPIE 3098, Optical Inspection and Micromeasurements II, (17 September 1997); https://doi.org/10.1117/12.281188

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