Mr. Hagen Bossemeyer Profile

Hagen Bossemeyer

at Leibniz Univ Hannover

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 15 August 2023 Paper

An extended model for the kinematic identification of a tiltable laser plane in adaptive light-section triangulation

Hagen Bossemeyer, Markus Kästner, Eduard Reithmeier

Proceedings Volume 12618, 126181T (2023) https://doi.org/10.1117/12.2673846

KEYWORDS: Cameras, Calibration, Mirrors, Imaging systems, Sensors, Kinematics, Reflection, Systems modeling, Mirror surfaces, Laser systems engineering

Read Abstract +

Proceedings Article | 20 June 2021 Presentation + Paper

Robust and sub-pixel accurate wavelet-based segmentation of laser lines formed by lenticular lenses

Hagen Bossemeyer, Markus Kästner, Eduard Reithmeier

Proceedings Volume 11782, 1178218 (2021) https://doi.org/10.1117/12.2592657

KEYWORDS: Lenticular lenses, Wavelets, Sensors, Light sources, Optical sensors, Optical components, Light scattering, Image segmentation, Detection and tracking algorithms, Chemical elements

Read Abstract +

Proceedings Article | 1 April 2020 Presentation + Paper

Model-based calibration routine for a triangulation sensor for inner radius measurements of cylindrical components

Rüdiger Beermann, Hagen Bossemeyer, Robin Diekmann, Markus Kästner, Eduard Reithmeier

Proceedings Volume 11352, 113520S (2020) https://doi.org/10.1117/12.2552729

KEYWORDS: Cameras, Calibration, Mirrors, Clouds, 3D modeling, Calculus, 3D metrology, Model-based design, Mathematical modeling

Read Abstract +

None-tactile metrology systems for inner radius measurements of cylindrical objects with large diameters are often based on the triangulation principle, using a laser source as illumination unit and a camera as detection unit. Different approaches have been presented in the past in order to generate a complete profile section of the measurement object’s inner radius. A standard light-section sensor cannot provide a 360° view of the radius without sensor rotation around the cylinder axis. The additional rotation axis needs to be calibrated and the captured point clouds registered in the same coordinate frame. To spare the necessity of a rotational axis, we developed a prototype sensor based on the hardware approach suggested by Yoshizawa et al.,¹ using a cylinder cone mirror and a laser illumination unit in order to generate a line circle projected onto the inner radius. In combination with a wide-angle camera, the laser line can be captured in one shot. Unlike the approach by Yoshizawa et al. , we present a model-based calibration routine for the triangulation sensor by mathematically describing the laser light path. The cone mirror expands the laser light into a disc (plane) or into a cone – depending on the incidence angle between laser and mirror. In our model, the light cone is parametrized by the right circular cone equation to reduce the number of unknowns in regression calculus. The necessary 3D support points to approximate the model parameter are gained by recording planar calibration pattern poses with and without laser line. The intersection calculation between the camera’s line-of-sight and the projected laser light geometry is derived, and the mathematical ambiguity in the line-cone intersection successfully solved. We present first experimental calibration and measurement data of a cylinder. By intentionally misaligning sensor and cylinder axes with arbitrarily chosen angles, the robustness of the suggested procedure is demonstrated.

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years