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Passive infra-red intrusion sensor

  • US 6,211,522 B1
  • Filed: 07/02/1998
  • Issued: 04/03/2001
  • Est. Priority Date: 01/04/1998
  • Status: Expired due to Term
First Claim
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1. An infra-red lens array comprising a plurality of lenses arranged in at least one upper row comprising at least one convex lens, and at least one lower row comprising at least one cylindrical lens whose cylindrical axis is aligned substantially perpendicular to the direction of the row.

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