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Optical Engineering

Polarization optics design for a laser tracking triangulation instrument based on dual-axis scanning and a retroreflective target
Author(s): J. Rene Mayer
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Paper Abstract

The design of the polarizing optics of an instrument that uses laser tracking triangulation for the dynamic measurement of the 3-D coordinates of a retroreflective target is presented. The system, which uses dual-axis scanning mirrors, has applications in the performance testing and calibration of industrial robots. Analytical and experimental results are provided for the design of the polarizing scheme to maximize beam-energy usage for a given safety classification while minimizing any unwanted laser feedback and secondary beams that can affect measurement precision. Finally, a study of the depolarizing effects of air-path retroreflectors shows how severe degradation of measurement accuracy can result from their use in this context, which thus supports the alternative use of a cat's-eye type target.

Paper Details

Date Published: 1 December 1993
PDF: 11 pages
Opt. Eng. 32(12) doi: 10.1117/12.151296
Published in: Optical Engineering Volume 32, Issue 12
Show Author Affiliations
J. Rene Mayer, University of Surrey, Guildford, Surrey, England (Canada)

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