Patent ID: 8390801

Claim:
A semi-active laser (SAL) guided projectile, comprising: a projectile; one or more control surfaces on the projectile; a dome that is mounted on one end of the body, said dome transmissive of laser energy; a seeker mounted on the projectile behind the dome, comprising, a non-imaging optical sub-assembly that focuses incident laser energy reflected off a target into a spot; a detector comprising a plurality of segments, each segment responsive to incident laser energy to output a measure of the integrated energy; means for normalizing the measures by dividing each measure by the largest measure to generate a normalized response; a matched filter (MF) comprising a plurality of component matched filters at different angle measurements that span a field of view (FOV), each said component matched filter comprising a number of weights corresponding to the normalized response of the like number of segments of the detector for a particular angle measurement, said MF responsive to the normalized response to search the FOV and select the component matched filter and angle measurement; and a flight control system that receives the angle measurement and generates control signals to manipulate the one or more control surfaces to control the flight of the projectile.