G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/24 (2006.01) G01B 11/25 (2006.01)
Patent
CA 2086378
An optical sensor for three dimensional shapes includes a laser that produces a lamellar plane beam which illuminates the surface of an object. The lamellar plane beam produces a curvilinear luminous trace that is scanned by at least one video camera, to produce information that is then converted into digital data representing pixel coordinates. The sensor includes a lightbox having a common housing that is positioned a short distance above the object to be scanned. The lightbox housing also includes a laser source that produces a coll1mated rectilinear beam and an optical device for converting the rectilinear beam into the lamellar plane beam. The lightbox housing also includes a device for lengthening the optical path of the lamellar plane beam, comprising two fixed plane mirrors in face to face relationship to produce a plurality of reflections between a bçam entry point and beam exit point of the lightbox. The small physical distance between the housing and the object is compensated by a virtual optical distance so that there is a correlative increase in the depth of field of the usable region of the lamellar plane beam at the beam exit point from the housing.
Cosnard Eric
Steuperaert Jan
Kreon Industrie
Ridout & Maybee Llp
LandOfFree
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