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Proceedings Paper

Contactless dimensional measurement by laser beam scanning
Author(s): Constantin Blanaru; Victor S. Damian; Dan Apostol; Gheorghe Popescu; V. Valeanu; H. Bozdog; Dorin Todor
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Paper Abstract

Accurate dimensional measurement is a stringent demand of today technology. Sometimes, the measurement is difficult because the body under test is not touchable. A modern solution of these two problems is contactless dimensional measurement by laser beam scanning. A moving mirror, driven by a scanner, reflects the incident He-Ne laser beam and forces it to describe a plane. A collimator transforms the plane in a parallel one, which defines the measuring field. When the test body is in the measuring field, it generates a shadow area, with a length proportional to the dimension of the body. This light distribution focuses on the surface of a photo-detector and then the electronic system processes it in order to display the results of the measurement. To prove this method, a set-up has been developed; its block-diagram is presented and the preliminary results are reported. Measuring range is (2 - 75) mm, resolution is of 1 micrometers and the accuracy is +/- 10 micrometers (2 (sigma) ).

Paper Details

Date Published: 8 March 1995
PDF: 3 pages
Proc. SPIE 2461, ROMOPTO '94: Fourth Conference in Optics, (8 March 1995); doi: 10.1117/12.203476
Show Author Affiliations
Constantin Blanaru, Institute of Atomic Physics (Romania)
Victor S. Damian, Institute of Atomic Physics (Romania)
Dan Apostol, Institute of Atomic Physics (Romania)
Gheorghe Popescu, Institute of Atomic Physics (Romania)
V. Valeanu, Institute of Atomic Physics (Romania)
H. Bozdog, Institute of Atomic Physics (Romania)
Dorin Todor, Institute of Atomic Physics (Romania)

Published in SPIE Proceedings Vol. 2461:
ROMOPTO '94: Fourth Conference in Optics
Valentin I. Vlad, Editor(s)

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