Process and apparatus for the automatic inspection of patterns

Details Process and apparatus for the automatic inspection of patterns Process and apparatus for the automatic inspection of patterns

1976-08-12

1980-01-22

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358212, 356390, 356237, 250224, 250565, 235 92QC, 235 92CA, H04N 718

Patent

active

041852982

ABSTRACT:
An object pattern to be inspected, such as a printed circuit board, and a reference pattern are scanned synchronously by respective cameras. The outputs of the cameras are compared and a fault signal is produced when the outputs do not coincide.

REFERENCES:
patent: 3339076 (1967-08-01), Hilal
patent: 4006296 (1977-02-01), Peterson
A. C. Turits, Sense, Mark, and Count Video Defects, vol. 12, No. 6, 11-69, . 795, IBM (T.D.B.).
G. Giedd, Defect Scanner, vol. 13, No. 5, 10-70, p. 1062, I.B.M. (T.D.B.).

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