Method of inspecting circuit boards and apparatus therefor

Details Method of inspecting circuit boards and apparatus therefor Method of inspecting circuit boards and apparatus therefor

1977-12-19

1979-05-01

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

250363S, H04N 718

Patent

active

041527232

ABSTRACT:
A method and apparatus for generating a digital image representation of a printed circuit board. The board has a substrate of insulating material. A pattern of metallic conductors is disposed on a surface of the insulating material. A beam of light energy scans this surface in a predetermined pattern. The beam has an energy level high enough to induce a detectable fluorescence in the surface of the insulating material. This fluorescence is detected and a binary signal is generated to indicate the presence or absence of fluorescence as the beam scans the surface. The binary signal is synchronized with the scanning of the beam such that a binary image representation of the board's surface is provided.

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