Process for determining and monitoring the shape of the edges of

Details Process for determining and monitoring the shape of the edges of Process for determining and monitoring the shape of the edges of

1989-09-20

1992-02-04

Rosenberger, Richard A.

Optics: measuring and testing

By configuration comparison

With comparison to master, desired shape, or reference voltage

356239, 356376, G01B 1100

Patent

active

050855166

ABSTRACT:
The process involves comparing the shape of the edges of a curved object being monitored with that of a standard curved object. A reference is obtained by tracing an orthogonal projection of the standard curved object on a plane. The monitored object is placed face-to-face with the reference and the edges of both the reference and the monitored object are illuminated by a fan beam produced by a laser. The required measurements are performed on the basis of the thus-generated traces and the use of guide marks. The present invention also discloses an apparatus for carrying out the above process. A typical application of the invention is in the monitoring of window panels in the automobile industry.

REFERENCES:
patent: 3985454 (1976-10-01), Fletcher et al.
patent: 4446481 (1984-05-01), Edamatsu et al.
patent: 4492477 (1985-01-01), Leser
patent: 4647197 (1987-03-01), Kitaya et al.
patent: 4701047 (1987-10-01), Eibert et al.
patent: 4847510 (1989-07-01), Douglas
Optical Engineering, vol. 18, No. 1, Janvier/Febrier 1979 pp. 63-66; G. Indebetouw: "A Simple Optical Noncontact Profilometer".

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