Apparatus for detecting and measuring defects

Details Apparatus for detecting and measuring defects Apparatus for detecting and measuring defects

1981-09-18

1983-11-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356237, 250572, G01N 2172

Patent

active

044171498

ABSTRACT:
An apparatus for detecting and measuring the area of defects in a sheet or rolled material comprises a defect detection section which rapidly scans the whole area of the material to locate the positions of defects and a defect size measuring section which is moved directly to each of the located positions to measure the area of the defect.

REFERENCES:
patent: 3280692 (1966-10-01), Milnes et al.
patent: 3851972 (1974-12-01), Smith et al.
patent: 4330205 (1982-05-01), Murakami et al.

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