Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1978-02-27
1979-03-20
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
350 89, 356241, H04N 718, G01N 2132, G02B 2110
Patent
active
041457145
ABSTRACT:
A television flaw detector, and process, for inspection of the wall surface of a hole through a circuit board. The circuit board is positioned on a support beneath a microscope, with the hole to be inspected aligned with the microscope. On the opposite side of the circuit board are an optical condenser and a light source. The condenser directs a divergent conical beam of light into the hole to illuminate the wall surface of the hole about its entire circumference and along its full length. A mask prevents non-reflected light rays from passing directly through the condenser and the hole into the microscope. A television camera mounted on the microscope is connected to a television monitor upon which it produces an image of a region of the wall surface of the hole extending from its full circumference at a selected position along its length.
REFERENCES:
patent: 3647961 (1972-03-01), Blitchington
patent: 3661440 (1972-05-01), Takahashi
patent: 3873211 (1975-03-01), Watson
patent: 3920311 (1975-11-01), Tsuda
patent: 3922097 (1975-11-01), Nachet
patent: 3983388 (1976-09-01), Gugliotta
patent: 4028728 (1977-06-01), Sharp
MacDonald Robert W.
Yates Robert W.
Britton Howard W.
MacDonald Robert W.
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