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Object sensor system for doors

  • US 5,739,523 A
  • Filed: 11/06/1995
  • Issued: 04/14/1998
  • Est. Priority Date: 11/07/1994
  • Status: Expired due to Term
First Claim
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1. A door sensor system comprising:

  • light-emitting means for generating light to be projected toward a floor near a door;

    focusing means for focusing a component of light generated by said light-emitting means which impinges directly thereon and directing the focused light component directly toward a first region at a location along said door;

    variably tiltable reflecting means for reflecting, toward said focusing means, a component of said light which does not directly impinge on said focusing means, and directing said reflected light component toward a second region at a location more remote from said door than said first region; and

    light-receiving means adapted to receive light reflected from said first and second regions.

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