Compact 3D camera

Thorsten Bothe; Wolfgang Osten; Achim Gesierich; Werner P. O. Jueptner

doi:10.1117/12.473573

19 June 2002 Compact 3D camera

Thorsten Bothe, Wolfgang Osten, Achim Gesierich, Werner P. O. Jueptner

Author Affiliations +

Proceedings Volume 4778, Interferometry XI: Applications; (2002) https://doi.org/10.1117/12.473573
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

A new, miniaturized fringe projection system is presented which has a size and handling that approximates to common 2D cameras. The system is based on the fringe projection technique. A miniaturized fringe projector and camera are assembled into a housing of 21x20x11 cm size with a triangulation basis of 10 cm. The advantage of the small triangulation basis is the possibility to measure difficult objects with high gradients. Normally a small basis has the disadvantage of reduced sensitivity. We investigated in methods to compensate the reduced sensitivity via setup and enhanced evaluation methods. Special hardware issues are a high quality, bright light source (and components to handle the high luminous flux) as well as adapted optics to gain a large aperture angle and a focus scan unit to increase the usable measurement volume. Adaptable synthetic wavelengths and integration times were used to increase the measurement quality and allow robust measurements that are adaptable to the desired speed and accuracy. Algorithms were developed to generate automatic focus positions to completely cover extended measurement volumes. Principles, setup, measurement examples and applications are shown.

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Thorsten Bothe, Wolfgang Osten, Achim Gesierich, and Werner P. O. Jueptner "Compact 3D camera", Proc. SPIE 4778, Interferometry XI: Applications, (19 June 2002); https://doi.org/10.1117/12.473573

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