Arrangement for sensing the geometric characteristics of an...

Details Arrangement for sensing the geometric characteristics of an... Arrangement for sensing the geometric characteristics of an...

G - Physics

03

B

354/137, 41/3, 3

G03B 29/00 (2006.01) G01B 11/245 (2006.01) G01B 11/25 (2006.01) G01C 11/02 (2006.01)

Patent

CA 1079965

Abstract of the Disclosure A plurality of projectors are positioned in spaced relation- ship about an object with a surface to be geometrically analyzed. The projectors have cooperating masks which project onto the object illuminated patterns that subdivide the object into pre- determined sections. Each mask has a predetermined pattern of sections, and is applied in sequence. The masks are cooperatively advanced in the projectors, with a separate illuminating pattern prevailing on the object each time that the masks are advanced. The combinations of the patterns on the masks define closely- spaced sections subdividing the object. The patterns are coded so that each section is uniquely defined in coded form. Cameras having the entire object within their field of view, photograph the object each time a separate mask is applied. The cameras also provide a photograph of a reference surface of unknown geometric character. Geometric characteristics of the object are derived from such photographs.

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