Abstract: An apparatus for applying optical energy to selectively remove material carried upon a substrate, preferably in substantially parallel lanes of material-free areas, which apparatus comprises an optical generator for generating optical energy in a primary beam, partitioning devices for dividing the primary beam into a plurality of derivative beams, reflective devices for reflecting each of the derivative beams to form a plurality of working beams which impact the substrate, focusing lenses for focusing each of the plurality of working beams upon the substrate, and transport means for transporting the substrate in a direction transverse of the plurality of working beams to effect continuous removal of material in substantially parallel lanes from the substrate by the working beams.

Abstract: A wide field of view infrared sensor is disclosed. A field of view in excess of 180 degrees is achieved by the use of a single element, negative miniscus lens. There is provided a flat PbS detector element, and the lens has an anti-reflection coating of SiO.