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One-way optical highway communication system

  • US 5,734,343 A
  • Filed: 07/18/1996
  • Issued: 03/31/1998
  • Est. Priority Date: 07/18/1996
  • Status: Expired due to Fees
First Claim
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1. A one-way optical communication system adapted for vehicular use, comprising:

  • a motor vehicle having a light-readable indicia comprising a thin film of a metal or metal oxide patterned to be reflective in the infrared or ultraviolet regions of the electromagnetic spectrum, but substantially transparent to visible light, the indicia mounted in a window of the vehicle;

    illuminating means, remotely located from the motor vehicle, to illuminate the indicia with infrared or ultraviolet light;

    detecting means, remotely located from the motor vehicle, to receive infrared or ultraviolet light reflected from the illuminated indicia;

    analyzing means, connected to the detecting means, to process a signal output from the detecting means in order to identify the motor vehicle.

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