Alignment, Tooling, and Angle Tracking
One of the most common applications of lasers in industry arises in the solution of alignment problems, in which knowledge of the displacement from a reference line or plane is desired. Use of laser alignment techniques has replaced older, more tedious methods of performing such tasks as machine tool alignment. These applications are made possible by the unusual properties of laser radiation. The most important properties are the directionality of the beam and the high radiance.
A collimated Gaussian laser beam has a spatial distribution given by
(8.1)
where r is the radial distance from the beam ...
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