30 September 2011 Phase-shifting fringe projection system using freeform optics
Author Affiliations +
Proceedings Volume 8169, Optical Fabrication, Testing, and Metrology IV; 81690W (2011); doi: 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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Susanne Zwick, Peter Kühmstedt, Gunther Notni, "Phase-shifting fringe projection system using freeform optics", Proc. SPIE 8169, Optical Fabrication, Testing, and Metrology IV, 81690W (30 September 2011); doi: 10.1117/12.896819; https://doi.org/10.1117/12.896819
PROCEEDINGS
9 PAGES


SHARE
KEYWORDS
Mirrors

Light sources

Projection systems

Phase shifts

Distortion

Modulation

Beam shaping

Back to Top