Patent ID: 6961456
Filing Date: 2005-11-01
Classification: G06K,Y10S

Abstract:
1. An imaging system for capturing an image of a plurality of objects randomly positioned on a moving conveyor belt, comprising: a primary lens assembly for converging a beam of light reflected by a surface of the conveyor belt and by objects randomly positioned on the surface; a secondary lens assembly for converging said beam of light from said primary lens assembly; a phase mask for altering the beam of light converged by the secondary lens assembly such that the imaging system is insensitive to small distances between objects positioned on said conveyor belt and the primary lens assembly; and a beamsplitter for splitting the altered beam of light to a first image detector and to a second image detector disposed at 90° angle with respect to the first image detector, wherein the first image detector generates an output signal of a first portion of the conveyor belt surface; and wherein the second image detector generates an output signal of a second portion of said conveyor belt surface.