Patent ID: 6084663
Filing Date: 2000-07-04
Classification: G01N,G01R

Abstract:
An apparatus for inspecting an IC on a printed circuit board assembly, the IC having leads extending from four sides, the apparatus comprising:a lighting assembly for illuminating the printed circuit board assembly, anda plurality of cameras for viewing the printed circuit board assembly, the plurality of cameras including:a center camera having an optical axis arranged substantially perpendicularly to the printed circuit board assembly; andtwo opposing pairs of surround cameras arranged such that their respective optical axes are positioned symmetrically about the optical axis of the center camera and the axes are arranged obliquely with respect to the printed circuit board assembly such that each opposing pair of surround cameras has two associated fields of view on the printed circuit board assembly,wherein the two fields of view of each opposing pair of surround cameras do not overlap and the two fields of view are separated to enable the leads on two opposite sides of the IC to be separately viewed by the opposing pair of surround cameras.