Defect inspection apparatus

Details Defect inspection apparatus Defect inspection apparatus

1984-06-05

1985-04-02

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

250563, 356431, H04N 718

Patent

active

045090769

ABSTRACT:
A defect inspection apparatus having a television camera which picks up an object to be inspected and produces a video signal for inspecting defects on the object, wherein the apparatus comprises a detection section which outputs a signal responding to the positive changes of the video signal with respect to time and a further detection section which outputs a signal in response to the negative changes of the video signal with respect to time, so that a defect detection signal is only output when, after one of the detection sections generates an output, the other detection section generates an output within a given time period.

REFERENCES:
patent: 3646353 (1972-02-01), Bhullar et al.
patent: 3715476 (1973-02-01), Watanabe
patent: 3795452 (1974-03-01), Bourdelais et al.
patent: 4011457 (1977-03-01), Wolf
patent: 4110048 (1978-08-01), Akutsu et al.

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