Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1989-06-21
1991-05-21
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324158R, 356 4, G01R 3102, G01P 342
Patent
active
050178644
ABSTRACT:
An inspection apparatus for inspecting printed circuit boards on which components have been mounted, wherein a light source that generates a light beam in a concentrated spot fashion is mounted on a rotary object and radiates the beam spot onto the printed circuit board at approximately right angles thereto while the rotary object is rotating, so that the surface of the printed circuit board is scanned by the beam spot. Changes of at least either one of the reflection angle and the intensity of the light reflected from the printed circuit board is detected by photoelectric converters provided on the rotary object, and at least either one of the height and the brightness of the position at which the beam spot and the printed circuit board are intersected is measured, thereby performing the inspection of the printed circuit board.
REFERENCES:
patent: 4636068 (1987-01-01), Niiho et al.
patent: 4671650 (1987-06-01), Hirzel et al.
Kaida Kenichi
Okuda Eiji
Yamada Osamu
Karlsen Ernest F.
Matsushita Electric - Industrial Co., Ltd.
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