Calibration of a 3D surface contouring and ranging system

Qingying Hu; Peisen S. Huang; Qionglin Fu; Fu-Pen Chiang

doi:10.1117/12.370256

16 November 1999 Calibration of a 3D surface contouring and ranging system

Qingying Hu, Peisen S. Huang, Qionglin Fu, Fu-Pen Chiang

Proceedings Volume 3835, Three-Dimensional Imaging, Optical Metrology, and Inspection V; (1999) https://doi.org/10.1117/12.370256
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

A new 3D surface contouring and ranging system based on a digital fringe projection and phase shifting technique is described. In this system, three phase-shifted fringe patterns and a centerline pattern are used to determine the absolute phase map of the object. This phase map is then converted to the absolute x, y, and z coordinates of the object surface by a transformation algorithm. To determine the accurate values of the system parameters as required by the transformation algorithm, a two-step calibration procedure was developed. First the parameters were indirectly measured through experiments to determine their approximate values. Second, a calibration plate whose features were calibrated by a coordinate measuring machine was measured by the system at various positions. An iteration algorithm was then used to estimate the system parameters. Measurements of the calibration plate, a sheet- metal panel, and a Ford master gauge showed results consistent with the actual surface contours of the objects.

Citation Download Citation

Qingying Hu, Peisen S. Huang, Qionglin Fu, and Fu-Pen Chiang "Calibration of a 3D surface contouring and ranging system", Proc. SPIE 3835, Three-Dimensional Imaging, Optical Metrology, and Inspection V, (16 November 1999); https://doi.org/10.1117/12.370256

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