Patent ID: 7075099

Claim:
A system for use in detecting the edge of a web of moving material, the system comprising; a plurality of light sources being operative to transmit light, the plurality of light sources being located within a first housing section; a light source lens array comprising a first plurality of lenses positioned in a single piece of material that is separate from the first housing section, the light source lens array being positioned to focus light transmitted from the plurality of light sources; a light receiver lens array comprising a second plurality of lenses positioned in a single piece of material that is separate from a second housing section, the light receiver lens array being positioned to receive light focused by the light source lens array, the light receiver lens array being operative to focus the received light; wherein the light receiver lens array is spatially separated from the light source lens array such that a gap is formed between the light receiver lens array and the light source lens array and such that a portion of a web can pass through the gap between the light receiver lens array and the light source lens array; and a plurality of light receivers positioned to receive light focused by the light receiver lens array, the plurality of light receivers being located within the second housing section.