Process and device for measuring distances on strips of...

Details Process and device for measuring distances on strips of... Process and device for measuring distances on strips of...

2006-05-30

2006-05-30

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

Shape or surface configuration

Triangulation

C356S429000

Reexamination Certificate

active

07054013

ABSTRACT:
Process for measuring distances by optical means on a specular or quasi-specular strip (1) of bright metal, characterised by the following steps:an incident light beam is emitted by a source (7) incorporated into a measurement head (10), said source projecting a pattern (11) in the form of a plurality of points, preferably a line, arranged along an axis that is essentially perpendicular to the motion direction of the metal surface, in an incidence direction upon a fixed part (5), preferably non-specular, of the installation;firstly, said beam is partially reflected by said fixed part (5) essentially along the same path as the incident beam and in the opposite direction towards a detector (8) belonging to said measurement head (10) and located in the immediate vicinity of said source (7);secondly, said beam is partially reflected towards said metal strip (1), from where it is further reflected in the direction of said detector (8).

REFERENCES:
patent: 4322971 (1982-04-01), Strobel
patent: 4735508 (1988-04-01), Bellio
patent: 4937445 (1990-06-01), Leong et al.
patent: 5087822 (1992-02-01), Fairlie et al.
patent: 5477332 (1995-12-01), Stone et al.
patent: 5822070 (1998-10-01), Syre
patent: WO94/02658 (1994-02-01), None
patent: WO98/21550 (1998-05-01), None

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