G - Physics – 01 – R
Patent
G - Physics
01
R
356/2
G01R 31/28 (2006.01) G01N 21/88 (2006.01) G01N 21/956 (2006.01)
Patent
CA 2008378
Abstract Inspection of a circuit board to detect missing and misaligned active and passive surface-mounted components and, respectively, is accomplished by first illuminating the board with top light to enhance the image of the passive components. The circuit board is then displaced, relative to a linescan camera trained on the board, so that the camera captures the image of successive strips of surface area running across the board perpendicular to its direction of movement. The images captured by the camera are stored and thereafter processed by an image-processing system to determine whether any passive component is missing or misaligned. The circuit board is then illuminated with side light to enhance the image of the active components. The circuit board is again displaced relative to the linescan camera so the camera captures the image of successive strips of surface area on the board. The captured images are stored and then processed by the image-processing system to detect whether any of the active surface-mounted components are missing or misaligned.
Amir Israel
Higgins Frank P.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
LandOfFree
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