Patent ID: 7113313
Filing Date: 2006-09-26
Classification: G01N,G01R

Abstract:
1. An apparatus for inspecting a printed circuit board device having a component, the apparatus comprising an object carrier for carrying the printed circuit board device, imaging means for imaging along an optical axis so as to receive light reflected from surfaces of the device when placed on the object carrier within a field of view of the imaging means, and light projecting means for projecting light toward the object carrier in an oblique direction with respect to the optical axis of the imaging means for illumination of said surfaces of the device, the light projecting means including a substantially dome-shaped structure incorporating a plurality of light elements for producing and projecting the light, said plurality of light elements including light elements of different light characteristics and light elements of different orientations of projection for creating a predetermined illumination pattern on said surfaces of said printed circuit board device, wherein said dome-shaped structure is composed of an assembly of a plurality of structural rings incorporating said light elements and being fitted together in a replaceable manner to form said ring assembly, thereby enabling said light pattern to be varied by replacing one of said structural rings that incorporates light elements of predetermined light characteristics and predetermined orientation of projection by a different structural ring incorporating light elements of different light characteristics and orientation of projection.