Phase-shifting fringe projection system using freeform optics

Susanne Zwick; Peter Kühmstedt; Gunther Notni

doi:10.1117/12.896819

30 September 2011 Phase-shifting fringe projection system using freeform optics

Susanne Zwick, Peter Kühmstedt, Gunther Notni

Proceedings Volume 8169, Optical Fabrication, Testing, and Metrology IV; 81690W (2011) https://doi.org/10.1117/12.896819
Event: SPIE Optical Systems Design, 2011, Marseille, France

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.

Citation Download Citation

Susanne Zwick, Peter Kühmstedt, and Gunther Notni "Phase-shifting fringe projection system using freeform optics", Proc. SPIE 8169, Optical Fabrication, Testing, and Metrology IV, 81690W (30 September 2011); https://doi.org/10.1117/12.896819

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