Contact-free optical linear measurement device

Details Contact-free optical linear measurement device Contact-free optical linear measurement device

1985-10-15

1988-03-22

Evans, F.

Optics: measuring and testing

By configuration comparison

With photosensitive film or plate

356386, G01B 1108

Patent

active

047324864

ABSTRACT:
A contact free, optical linear measurement device comprising a beam of light that is emitted by a laser and this is displaced parallel to itself within a first beam path. A semi-reflecting mirror reflects the light of the first beam path to a path-diverting mirror, in this way generating a second beam path, the course of which is parallel to, and at a fixed distance from, the first beam path. An object to be measured is positioned at right angles in relation to and within the two beam paths. Light sensors receive dark and light signals in the respective beam paths behind the object to be measured. By means of an electronic evaluating unit an inclination of the object to be measured can be determined and the exact diameter of the object to be measured can be calculated, without being influenced by its inclination.

REFERENCES:
patent: 3621266 (1971-11-01), Akuta et al.

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