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Aircraft collision warning system

  • US 4,755,818 A
  • Filed: 08/15/1986
  • Issued: 07/05/1988
  • Est. Priority Date: 08/15/1986
  • Status: Expired due to Fees
First Claim
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1. An aircraft collision warning system comprising an aircraft having a low power pulse laser system which projects narrow bandwidth radiation through transmitter fish-eye lens means and around the aircraft in 4 π

  • steradians of two hemispheres, said laser system including an eye-safe laser means with beam expander means for directing rays to said transmitter fish-eye lens means and into the area around the aircraft, and a matched, narrow bandwidth receiver system mounted on said aircraft with a 360°

    field-of-view which detects radiation emitted from another aircraft within range of said receiver system through receiver fish-eye lens means adapted for receiving emitted radiation from another aircraft in 4 π

    steradians of two hemispheres, said receiver system including focusing lens means for directing received radiation onto a detector means, filter means disposed between said focusing lens means and detector means for filtering out undesirable radiation, amplifier means for amplifying an output from said detector means, and warning means responsive to said output from said detector means for activating a warning when radiation emitted from another aircraft within range of said receiver system is detectd by said detector means.

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