Surface inspection apparatus

Details Surface inspection apparatus Surface inspection apparatus

1989-09-19

1991-12-24

Rosenberger, Richard A.

Optics: measuring and testing

By monitoring of webs or thread

356431, 356445, 250572, G01N 2184, G01N 2188

Patent

active

050746685

ABSTRACT:
A surface inspection apparatus used for inspecting defects of sheet material surfaces includes an optical scanner, a lens unit, a filter, and a photoelectric converter. The lens unit has a plurality of convex lenses arranged in the scanning direction of the optical scanner and adjoining each other. Partitions are arranged in the direction perpendicular to the direction of arrangement of the convex lenses, extending from both ends of the lens unit and from the adjoining portions between the adjoining convex lenses towards the filter.

REFERENCES:
patent: 3612702 (1971-10-01), Troll
patent: 3663107 (1972-05-01), Denis et al.
patent: 4260899 (1981-04-01), Baker
patent: 4277178 (1981-07-01), Cushing et al.
patent: 4488808 (1984-12-01), Kato
patent: 4500208 (1985-02-01), Sick
patent: 4522497 (1985-06-01), Ikin
patent: 4591726 (1986-05-01), Schenk
patent: 4868403 (1989-09-01), Takahashi et al.

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