Method and apparatus for examining printed circuit board provide

Details Method and apparatus for examining printed circuit board provide Method and apparatus for examining printed circuit board provide

1982-10-18

1985-10-22

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

356239, 250563, 382 8, H04N 718

Patent

active

045492069

ABSTRACT:
The rear and front surfaces of a printed circuit board are illuminated by parallel light beams from first and second illuminating systems, respectively. The obtained transmitted light and reflected light are received by an image sensor through a lens system to provide video data which is stored in a video memory. Abrasion scars are formed by brushing the surfaces of terminals formed on the front surface of the printed circuit board prior to soldering. The presence or absence of a chip element is discriminated by a microprocessor in accordance with the difference between reflection factors of light emitted by the second illuminating system and reflected from the terminals and light reflected from the chip element.

REFERENCES:
patent: 3688235 (1976-06-01), Migeotte
patent: 3813173 (1974-05-01), Teter
patent: 3963354 (1976-06-01), Feldman et al.
patent: 4115802 (1978-09-01), Kramer et al.
patent: 4342515 (1982-08-01), Akiba et al.
patent: 4449818 (1984-05-01), Yamaguchi et al.
UK Patent Office Action-Jun. 11, 1984.

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