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Night vision systems

  • US 4,755,664 A
  • Filed: 07/23/1986
  • Issued: 07/05/1988
  • Est. Priority Date: 07/31/1985
  • Status: Expired due to Term
First Claim
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1. A night vision system for a vehicle comprising:

  • a headgear mounted night vision goggle having a combiner eyepiece through which a wearer of the headgear is able to view a scene forward of the goggle and image intensifier means for projecting into the said eyepiece an intensified image of said forward scene for transmission via said eyepiece to an eye of the wearer;

    a viewing zone in the vehicle interior in which is presented a display to be viewed by a wearer of the headgear during the operation of the vehicle;

    a radiation source operable to emit radiation in a waveband substantially outside the visible portion of the spectrum;

    a sensor responsive to radiation emitted by said source and arranged so as to receive radiation from said source substantially only when the wearer is viewing said viewing zone through said goggle; and

    means for controlling the intensity of said intensified image in response to the output of said sensor so that when the sensor is receiving radiation from said source the intensity of said intensified image is reduced to a level sufficient not to interfere substantially with the helmet wearer'"'"'s view of the viewing zone through said eyepiece.

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