A graphical code reader is described herein. The graphical code reader includes an infrared light-emitting diode and a red light-emitting diode. The graphical code reader also includes an image sensor. A lens is positioned to focus reflected light on the image sensor. The graphical code reader also includes...http://www.google.fr/patents/US7036735?utm_source=gb-gplus-shareBrevet US7036735 - Graphical code reader having illumination LEDs of different wavelengths
Graphical code reader having illumination LEDs of different wavelengths
