| http://www.w3.org/ns/prov#value | - It is to be understood that the position sensing device 100 may be incorporated into devices other than scanning devices and that the scanning device 104 may be used in conjunction with objects other than sheets of paper. [0034] The position sensing device 100 may have a photodetector assembly 110, a first light source 140, and a second light source 142.
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