Patent ID: 7375313

Claim:
A motion-activated lighting fixture including an aimable PIR motion detector, the motion detector including a housing having a generally forward looking window, the motion detector being structured and arranged to define a first plurality of infra-red detection zones directed through said generally forward looking window, detection zones of said first plurality forming a first zonal pattern extending in the generally forward direction and arranged for monitoring a far field at a far level of vision, and the housing being movably mounted on a base member so as to permit the far field to be aimed at various positions closer and farther away, wherein the improvement is characterized in that: said housing has a generally horizontal downward looking window disposed at the underside of said housing and includes an optical arrangement focusing infra-red energy from a second plurality of detection zones through said downward looking window, said second plurality of detection zones forming a second zonal pattern for monitoring a field behind and underneath said motion detector housing, the zones of said second zonal pattern being angulated and disposed with respect to said far level of vision such that one or more of the zones of said second zonal pattern will be in disposition for monitoring the field behind said motion detector housing when said far field is aimed at said various positions.