Phase Detected Triangulation: A New Twist On An Old Technology

Leonard H. Bieman; Kevin G. Harding; Mark Michniewicz; Robert Tait

doi:10.1117/12.942879

12 March 1988 Phase Detected Triangulation: A New Twist On An Old Technology

Leonard H. Bieman, Kevin G. Harding, Mark Michniewicz, Robert Tait

Proceedings Volume 0850, Optics, Illumination, and Image Sensing for Machine Vision II; (1988) https://doi.org/10.1117/12.942879
Event: Advances in Intelligent Robotics Systems, 1987, Cambridge, CA, United States

Abstract

A new approach to measuring range using triangulation is presented. In this approach, the triangulation angle is determined by spatially modulating the intensity of light in front of a single channel photodetector and then measuring the phase of the detector output signal. Using a single detector instead of the commonly used linear array or lateral effect photodivide, allows an increased signal to noise ratio and the possibility of faster measurement rates. Two possible application areas discussed are long range measurement (greater than one meter) and measurement of mirror like surfaces.

Citation Download Citation

Leonard H. Bieman, Kevin G. Harding, Mark Michniewicz, and Robert Tait "Phase Detected Triangulation: A New Twist On An Old Technology", Proc. SPIE 0850, Optics, Illumination, and Image Sensing for Machine Vision II, (12 March 1988); https://doi.org/10.1117/12.942879

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