Night vision system for vehicles

Night vision system for vehicles

  • CN 101,440,922 B
  • Filed: 06/17/2005
  • Issued: 05/13/2015
  • Est. Priority Date: 07/05/2004
  • Status: Active Grant
First Claim
Patent Images

1. for the infrared illuminator of automobile, there is at least one light beam source (2) and an interference light filter (10), wherein this device can send white light beam along an axis and be in the infrared beam in the wave-length coverage between 800 and 1200nm, wherein this infrared beam has the intensity being greater than 25W/sr, and this white light beam has the intensity being less than 2000Cd being not equal to zero, and described interference light filter (10) is so arranged:

  • when in visible-range, incidence angle is 20 °

    , average transmission degree is less than 0.5%, and transmission is greater than 75% in the wave-length coverage of 800nm to 1000nm, it is characterized in that;

    described interference light filter (10) is so arranged;

    the near infrared region of transmission upward at least 25nm width from about 1040nm is less than 60%, wherein said interference light filter so designs;

    spectral characteristic has a kind of steep seamed edge, transmission 50%-point is in 780nm.

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