High-resolution sequential thermal fringe projection technique for fast and accurate 3D shape measurement of transparent objects

Landmann M, Speck H, Dietrich P, Heist S, Kuehmstedt P, Tuennermann A, Notni G (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Applied Optics Optical Society of America

Book Volume: 60

Pages Range: 2362-2371

Journal Issue: 8

DOI: 10.1364/AO.419492

Abstract

Three-dimensional (3D) shape measurement systems based on diffuse reflection of projected structured light do not deliver reliable data when measuring glossy, transparent, absorbent, or translucent objects. In recent years, we have developed a method based on stereo recording with infrared cameras and projection of areal aperiodic sinusoidal thermal patterns to detect such objects. However, the measurements took longer than 10 s, up to minutes; moreover, the measurement accuracy was improvable. Now, we have succeeded in both drastically reducing measurement time and significantly increasing measurement quality. This finally provides a technique for reliably measuring transparent objects, e.g., in series production. We demonstrate measurement examples achieved within 1 s and with 3D standard deviations less than 10 µm.

Involved external institutions

Fraunhofer-Institut für Angewandte Optik und Feinmechanik (IOF) / Fraunhofer Institute for Applied Optics and Precision Engineering DE Germany (DE)

How to cite

APA:

Landmann, M., Speck, H., Dietrich, P., Heist, S., Kuehmstedt, P., Tuennermann, A., & Notni, G. (2021). High-resolution sequential thermal fringe projection technique for fast and accurate 3D shape measurement of transparent objects. Applied Optics, 60(8), 2362-2371. https://dx.doi.org/10.1364/AO.419492

MLA:

Landmann, Martin, et al. "High-resolution sequential thermal fringe projection technique for fast and accurate 3D shape measurement of transparent objects." Applied Optics 60.8 (2021): 2362-2371.

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