Non-destructive testing system with dual scanning

Details Non-destructive testing system with dual scanning Non-destructive testing system with dual scanning

1983-05-13

1985-07-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250572, 358106, G01N 2188

Patent

active

045284555

ABSTRACT:
A system is disclosed in which a defect-indicating material is applied to the surface of a part which is scanned by a laser beam or by use of a television camera to develop electrical signals indicating defects. A comparison arrangement is provided for developing output signals only when signals are developed from the same portions of the scanned region during two scans, and a blower is provided for displacing extraneous elements between scans.

REFERENCES:
patent: 2919624 (1960-01-01), Lindemann et al.
patent: 3777169 (1973-12-01), Walter et al.

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