Patent ID: 6987256

Claim:
An improvement in a semi-active laser last pulse logic missile seeker, the seeker having a single PIN photodiode detector, a staring imaging infrared focal plane array detector, means for correlating incoming temporal laser returns detected by the PIN photodiode detector with incoming spatial returns received by the staring imaging infrared focal plane array detector, and means for identifying, on the staring imaging infrared focal plane, the spatial laser return indicative of a laser-illuminated target, wherein the improvement comprises: a first polarizer disposed in a field of view of the PIN photodiode detector, the first polarizer having a first plurality of segments, each segment sized to completely cover the field of view of the PIN photodiode detector, wherein each segment allows transmission of a different polarization than other segments within the first plurality of segments; a second polarizer disposed in a detection field of view of the staring imaging infrared focal plane array, the second polarizer having a second plurality of segments corresponding to the plurality of segments of the first polarizer, each segment of the second plurality of segments sized to completely cover the field of view of the staring imaging infrared focal plane array, wherein each segment allows transmission of a different polarization than other segments within the second plurality of segments; and first and second actuators connected to the first and second polarizers to synchronously and simultaneously step corresponding segments of the first and second plurality of segments in a plurality of discrete steps within the corresponding fields of view in response to the incoming temporal and spatial laser returns.