Surface inspecting apparatus with strip width dividing means

Details Surface inspecting apparatus with strip width dividing means Surface inspecting apparatus with strip width dividing means

1989-03-20

1991-01-01

Nelms, David C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356431, G01N 2188

Patent

active

049821059

ABSTRACT:
An apparatus for inspecting the surface of a web material moving lengthwise at a constant speed by scanning the surface in the direction of the width of the surface with a light beam. The scanned beam modulated by the surface is received and converted into an electric signal which is divided into division signals representing lengthwise areas of the surface. At least one of the lengthwise areas or lanes into which the surface is divided is specified to be subjected to surface inspection. Surface signals of the specified lengthwise areas or lanes are separated from the other surface signals and evaluated for qualifying the surface of the web material.

REFERENCES:
patent: 3618063 (1971-11-01), Johnson
patent: 3898469 (1975-08-01), Nichols et al.
patent: 4134684 (1979-01-01), Jette
patent: 4546444 (1985-10-01), Bullis
patent: 4581632 (1986-04-01), Davis et al.
patent: 4868403 (1989-09-01), Takahashi et al.

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