HIGHLIGHTS
SUMMARY
The work in this paper measures the straightness of a machine path in space with respect to a laser beam by means of a sensor measuring the lateral position of the beam retroreflected by a target attached to the machine movable component. The target illuminated with laser beam, which constitutes profile of the retroreflected beam exhibits a central symmetry with a distinct peak the direction of the instrument and one of the directions of the straightness plane. in The return beam retroreflected by the target to be slightly divergent even with a perfectly collimated . . .
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