23 October 2001 Projection of structured light in object planes of varying depths for absolute 3D profiling in a triangulation setup
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Abstract
We are currently introducing a new scanning triangulation method for absolute 3D profiling of a macroscopic scene based on fringe projection technique. A scanning focal plane allows the phase to be determined for any desired depth range of the measurement volume. Furthermore, the limitations of the depth of focus occurring by projected light techniques will be overcome, allowing a large aperture and therefore better use of light. Two different systems based on this technique will be shown: System I uses both vertical and lateral translation of a Ronchi grating. System II uses an LCD element for generation of different fringes which has to be translated vertically, only. The basic principle of the new method is explained. First measurement results of both systems demonstrate the efficiency of the newly developed algorithms and the innovative measurement arrangements.
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Klaus Koerner, Ulrich Droste, Robert Windecker, Matthias Fleischer, Hans J. Tiziani, Thorsten Bothe, and Wolfgang Osten "Projection of structured light in object planes of varying depths for absolute 3D profiling in a triangulation setup", Proc. SPIE 4398, Optical Measurement Systems for Industrial Inspection II: Application in Industrial Design, (23 October 2001); doi: 10.1117/12.445556; https://doi.org/10.1117/12.445556
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