Optical apparatus for measuring objects having a rectilinear profile
AssigneeArea Sistemi S.r.l.
InventorEnrico Maria Pirinoli
Life of this patent
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Abstract
Apparatus for measuring an object (4) with at least one rectilinear edge or profile (4a, 4b) parallel to a given direction (y), comprising: a laser source (1) which emits radiation (2, 2a) which impinges on the said edge or profile; a first cylindrical converging lens (5) the directrices of which are parallel to the direction (y), disposed downstream of the object (4); a spatial filter (6) disposed in the focal plane (A) of the first converging lens (5); a second converging lens (7) disposed downstream of the spatial filter (6); and photosensors (8) disposed in the focal plant (F) of the second converging lens (7).
Claims6
Apparatus for measuring an object (4) having at least one essentially rectilinear outline or edge (4a, 4b), parallel to a given direction (y), the apparatus comprising:
- a laser source (1) capable of emitting radiation (2, 2a) which impinges on the said at least one edge or outline (4a, 4b);
- first converging lens means (5) disposed downstream of the object (4) and comprising at least one cylindrical lens (5) with its directrices parallel to the said given direction (y),
- spatial filter means (6) disposed in the focal plane (A) of the first converging lens means (5);
- second converging lens means (7) disposed downstream of the spatial filter means (6);
- photosensitive means (8) disposed in the focal plane (F) of the second converging lens means (7);
- characterised in that the spatial filter means (6) comprise an element essentially in the form of a wire or bar elongated in a direction parallel to the said given direction (y).
Dependencies are inferred from the claim text.