An optical scanner utilizes two linear CCD detectors and a bandpass means to improve the ability of the scanner to discriminate against specular reflection. A coded symbology is illuminated by a noncoherent light source and light reflected from the coded symbology along a first path strikes the front...http://www.google.com.au/patents/US5942762?utm_source=gb-gplus-sharePatent US5942762 - CCD scanner having improved specular reflection discrimination
