Patent ID: 8107719
Filing Date: 2012-01-31
Classification: G01R,G06T

Abstract:
1. A machine vision system for the three-dimensional metrology of a rapidly moving semiconductor or packaged electronic objects in various stages within a manufacturing facility, the system comprising: a structural subsystem including an enclosure mounted to the ground of the manufacturing facility, and including a back plate suspended from the enclosure, wherein the suspension of the back plate from the enclosure isolates the back plate from a vibration of the enclosure; a camera subsystem adapted to capture the image of a moving object when the object moves into a viewing area, wherein the camera subsystem includes a first camera mounted to the back plate, a second camera mounted to the back plate, and a third camera mounted to the back plate; a lighting subsystem connected to the back plate and adapted to illuminate the moving object, wherein the lighting subsystem comprises a first light group, a second light group and a third light group; and a processor adapted to receive the captured images from the cameras and to calculate a first determination of the three-dimensional metrology of the moving object based on the captured images from the first camera and the second camera, a second determination of the three-dimensional metrology of the moving object based on the captured images from the first camera and the third camera, and a third determination of the three-dimensional metrology of the moving object based on the captured images from the second camera and the third camera; wherein the structural subsystem, the camera subsystem, and the processor cooperate to reduce the statistical and systematic errors of the machine vision system to enable accurate three-dimensional metrology and inspection of the rapidly moving objects.