Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1990-07-13
1992-04-14
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324158F, 324158D, 358106, G01R 3101, G01N 2188
Patent
active
051051494
ABSTRACT:
An apparatus for inspecting electronic devices mounted on a circuit board is disclosed. The apparatus includes: a camera for forming an image of a view of an electronic device to be inspected; a laser device for emitting laser light toward the device to be inspected; a laser light detector for detecting a laser beam reflected from the device to be inspected; and a control unit for inspecting the condition of mounting the device to be inspected on the circuit board based on data obtained from the camera and the laser detector. Rough inspections are performed first by the camera which can rapidly perform the inspection, and then only failing devices are inspected by the combination of the laser device and detector which is capable of precisely measuring the solder shape. Therefore, visual inspection for various items is performed at an overall faster rate while maintaining the required inspection level.
REFERENCES:
patent: 4028728 (1977-06-01), Sharp
patent: 4772125 (1988-09-01), Yoshimura et al.
patent: 4863268 (1989-09-01), Clarke et al.
patent: 4872052 (1989-10-01), Liudzius et al.
Matsushita Electric - Industrial Co., Ltd.
Nguyen Vinh P.
Wieder Kenneth A.
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