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Proceedings Paper

Phase-shifting fringe projection system using freeform optics
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Paper Abstract

Phase-shifting fringe projection is one of the most effective methods for shape measurement. Conventional systems are based on a projector imaging fringes into the measurement plane. These systems are mainly limited to the spectral range of visible light, as projectors in UV- or IR-range suffer from technical problems. However, for certain applications these spectral ranges can be of interest. We introduce a novel fringe projector based on beamshaping using a freeform mirror. The fringes in the measurement plane are generated by redistributing light with the freeform mirror. This projection system is wavelength-independent and highly energy efficient, which makes it suitable for applications in UV and IR spectral ranges. Additionally, a measurement field with axially very large dimension can be realized. We present here the system design as well as system simulation results, that demonstrate the principle of our novel approach.

Paper Details

Date Published: 30 September 2011
PDF: 9 pages
Proc. SPIE 8169, Optical Fabrication, Testing, and Metrology IV, 81690W (30 September 2011); doi: 10.1117/12.896819
Show Author Affiliations
Susanne Zwick, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Peter Kühmstedt, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Gunther Notni, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)


Published in SPIE Proceedings Vol. 8169:
Optical Fabrication, Testing, and Metrology IV
Angela Duparré; Roland Geyl, Editor(s)

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