Surface inspecting apparatus

Details Surface inspecting apparatus Surface inspecting apparatus

1988-01-25

1989-09-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356431, G01N 2188

Patent

active

048684031

ABSTRACT:
An apparatus for inspecting the surface of 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 divisions of the width of the web. A first memory capability is provided for storing division signals added together by division every N transverse scans. The added division signals are transferred to a second memory capability by division, for evaluating the surface defect distribution of the scanned surface division by division.

REFERENCES:
patent: 3618063 (1971-11-01), Johnson
patent: 4134684 (1979-01-01), Jette
patent: 4509076 (1985-04-01), Yoshida
patent: 4546444 (1985-10-01), Bullis

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