Evaluation of the Range Performance of Laser Scanners Using Non-planar Targets.
Prem K. Rachakonda, Balasubramanian Muralikrishnan, Craig M. Shakarji, Vincent D. Lee, Daniel S. Sawyer
The Dimensional Metrology Group (DMG) at the National Institute of Standards and Technology (NIST) is supporting the development of documentary standards for performance evaluation of Laser scanners. This evaluation could be performed by determining the measurement error between two derived points at many positions in the work volume of such systems. Some of the test positions are along the ranging direction of the Laser scanner. This work involves exploring non-planar target artifacts such as a spherical, trihedral or a tetrahedral artifact, primarily to understand the influence of target geometry on ranging errors. Considerable work was done by the ASTM E57.02 committee on Test Methods towards evaluating ranging performance of Laser scanners, but that is limited to planar targets. Challenges in selecting a target artifact include the commercial availability of high quality targets which are conducive to both Laser scanners and the calibration instrument (a Laser tracker). Material and surface finish properties such as stiffness, reflectivity, optical penetration and geometric form affect their suitability for evaluating the ranging performance of Laser Scanners. Other challenges include mounting methods, data collection and data processing algorithms used to determine the targets derived point. This work will discuss the techniques explored at NIST to establish a procedure to evaluate the ranging performance of Laser scanners using Laser trackers and non-planar targets.
, Muralikrishnan, B.
, Shakarji, C.
, Lee, V.
and Sawyer, D.
Evaluation of the Range Performance of Laser Scanners Using Non-planar Targets., Proceedings of the 30th ASPE Annual meeting, Austin, TX, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=919240
(Accessed October 1, 2023)