US Patent 7572077 Mobile device having dual optical sensing pathways

A mobile device is provided having a printhead for printing onto a print medium, a media path for directing the print medium past the printhead for printing, an optical sensor, a first optical pathway for directing first optical image information to the optical sensor from print medium within an area of the media path, and a second optical pathway for directing second optical image information to the optical sensor from print medium within an area external to the mobile device.