An improvement in a semi-active laser last pulse logic missile seeker is disclosed
and claimed. In one embodiment, the improvement includes a first polarizer disposed
in the detection field of view of the PIN photodiode detector and a second polarizer
disposed in the detection field of view of the staring imaging infrared focal plane
array. Each of the first and second polarizers has an identically configured plurality
of segments. Each segment allows transmission of a different polarization than
other segments and is sized to completely cover the fields of view of both the
PIN photodiode detector and the staring imaging infrared focal plane array. First
and second actuators are connected to the first and second polarizers, respectively,
to synchronously and simultaneously step identical and corresponding segments in
a plurality of discrete steps within the fields of view in response to incoming
temporal and spatial laser returns.