×

Signal processing for object detection system

  • US 6,825,456 B2
  • Filed: 01/29/2002
  • Issued: 11/30/2004
  • Est. Priority Date: 05/25/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of detecting an object comprising the steps of:

  • illuminating a target with polarized radiation;

    collecting first radiation reflected from said target which has a polarization which is the same as the radiation used to illuminate said target;

    collecting second radiation reflected from said target which is oppositely polarized to that of said radiation which is used to illuminate said target; and

    comparing a difference between amplitudes of said first and second radiation with a predetermined value representative of an expected difference were the object not present; and

    wherein a single receiver channel is employed by the two collecting steps, which receiver channel is time multiplexed.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×