Patent ID: 7411206

Claim:
A system for use in detecting an edge of a web of material, the system comprising; a plurality of light sources being operative to transmit light, the plurality of light sources being arranged in two substantially parallel rows that are offset from one another so as to form a staggered pattern; a first plurality of lenses positioned such that each of the first plurality of lenses focuses light transmitted from one of the plurality of light sources; a second plurality of lenses positioned such that each of the second plurality of lenses is capable of receiving light focused by one of the first plurality of lenses; wherein the first plurality of lenses is spatially separated from the second plurality of lenses such that a gap is formed therebetween and such that only a portion of the web can pass through the gap; and a plurality of light receivers positioned such that each of the plurality of light receivers can receive light focused from one of the second plurality of lenses.