NON-IMAGING LIGHT COLLECTOR FOR ELECTRO-OPTICAL SCANNER

摘要

An extended working range electro-optical scanner for reading a barcode is described. The scanner includes a scan engine including a beam assembly for repetitively directing a beam of light at a scan angle across the barcode and an array of non-imaging light collectors for collecting and concentrating reflected light from the barcode. Each light collector of the array of light collectors includes entrance and exit apertures. A total area of the entrance apertures of the array of light collectors is greater than 50% of a total area of a target-facing surface of the scan engine. Each of a corresponding array of photodetectors is positioned at an exit aperture of a respective light collector of the array of light collectors to receive concentrated light from its respective collector and generates an output electrical signal corresponding to an intensity of the concentrated light received by the photodetector.