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Laser scanner two-face errors on spherical targets



Balasubramanian Muralikrishnan, Katharine M. Shilling, Daniel S. Sawyer, Prem K. Rachakonda, Vincent D. Lee, Steven D. Phillips, Geraldine S. Cheok, Kamel S. Saidi


Geometric misalignments within the construction of a laser scanner such as offsets, tilts, and eccentricities, result in systematic errors in the measured point coordinates (range and angles). Many of these sources of error are sensitive to two-face testing. Two-face tests can therefore be employed in the performance evaluation of laser scanners, just as they are used to assess laser tracker performance. The advantage of using two-face tests is that they are quick and easy to perform and require no calibrated artifact. The only requirement is that the target remains stationary between the front face and back face measurement. The primary objective here is to establish the noise (repeatability) in the detection of the sphere center and then determine whether systematic error sources within these instruments are discernible from two-face testing. Additionally, a geometric error model for a laser scanner is used to explain possible causes for any observed systematic two-face error.
Proceedings Title
Proceedings of the Annual Meeting of the ASPE 2014
Conference Dates
November 9-14, 2014
Conference Location
Boston, MA


laser scanner, two-face errors, volumetric performance evaluation


Muralikrishnan, B. , Shilling, K. , Sawyer, D. , Rachakonda, P. , Lee, V. , Phillips, S. , Cheok, G. and Saidi, K. (2014), Laser scanner two-face errors on spherical targets, Proceedings of the Annual Meeting of the ASPE 2014, Boston, MA (Accessed May 21, 2024)


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Created November 11, 2014, Updated February 19, 2017