5 February 1996 Laser-beam centering by the opaque wire method
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Proceedings Volume 2730, Second Iberoamerican Meeting on Optics; (1996); doi: 10.1117/12.231020
Event: Second Iberoamerican Meeting on Optics, 1995, Guanajuato, Mexico
Abstract
A simple method for centering a Gaussian laser beam is proposed. It consists of partially blocking out the beam by an opaque wire; when the power of the transmitted beam is brought to a minimum, by moving the relative position of the beam and the wire, the center of the beam and that of the wire are in coincidence. By using the usual formulae for Gaussian beams, the behavior of the power variations with the relative wire-beam position, as a function of the width of the wire are analyzed. The error of the method is also analyzed and it is shown that the optimum case is when the wire diameter equals (root)2 the beam radius. We show some experimental results.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rufino Diaz-Uribe, Roberto Ortega-Martinez, "Laser-beam centering by the opaque wire method", Proc. SPIE 2730, Second Iberoamerican Meeting on Optics, (5 February 1996); doi: 10.1117/12.231020; https://doi.org/10.1117/12.231020
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KEYWORDS
Opacity

Error analysis

Gaussian beams

Power meters

Sensors

Copper

Metals

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