3D shape measurement of objects with uncooperative surface by projection of aperiodic thermal patterns in simulation and experiment

Landmann M, Heist S, Dietrich P, Speck H, Kuehmstedt P, Tuennermann A, Notni G (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Optical Engineering Society of Photo-optical Instrumentation Engineers (SPIE)

Book Volume: 59

Article Number: 094107

Journal Issue: 9

DOI: 10.1117/1.OE.59.9.094107

Abstract

3D shape measurement systems based on diffuse reflection of projected structured light are widely used. Unfortunately, this measurement principle does not work for uncooperative materials, i.e., materials with optical properties such as being glossy, transparent, absorbent, or translucent. Recently, it was shown that 3D reconstruction of an uncooperative object can be performed by a two-step process. In the first step, the object absorbs a projected thermal pattern. In the second step, after energy conversion, the object surface reemits a diffused thermal pattern according to Planck's law. To achieve high 3D result qualities in short measurement times, projection parameters such as irradiance pattern and irradiation period must be optimized depending on optical and thermal material properties, e.g., complex spectral refractive index, thermal conductivity, specific heat capacity, or emissivity. Therefore, we have developed a simulation tool to describe the entire measurement process beginning with the projection unit, followed by the interaction of the irradiation with the measurement object, reemission of thermal radiation and recording unit, and finally the 3D reconstruction. In this contribution, we present our simulation tool, verify it with measurement results, and apply it to investigations of the influence of projection and material parameters on the 3D result quality.

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., Heist, S., Dietrich, P., Speck, H., Kuehmstedt, P., Tuennermann, A., & Notni, G. (2020). 3D shape measurement of objects with uncooperative surface by projection of aperiodic thermal patterns in simulation and experiment. Optical Engineering, 59(9). https://dx.doi.org/10.1117/1.OE.59.9.094107

MLA:

Landmann, Martin, et al. "3D shape measurement of objects with uncooperative surface by projection of aperiodic thermal patterns in simulation and experiment." Optical Engineering 59.9 (2020).

BibTeX: Download