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Optical coupler for distributive lighting system

  • US 5,931,576 A
  • Filed: 02/25/1997
  • Issued: 08/03/1999
  • Est. Priority Date: 02/26/1996
  • Status: Expired due to Fees
First Claim
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1. A headlamp for a vehicle comprising:

  • means for receiving an output end of a light-distribution optical fiber carrying light from a light source located at an input end to provide light having a known spatial intensity distribution at said output end;

    an optical coupler having an input and an output, said input of said optical coupler being located with respect to said means for receiving such that said known spatial intensity distribution is incident on said input of said optical coupler, said optical coupler comprising means for converting said known intensity distribution to a predetermined spatial intensity distribution at a predetermined location, anda projection lens for projecting said predetermined spatial intensity distribution to provide a desired illumination pattern wherein a mask is placed over the output of the coupler and having an opaque planar sheet with an opening therein in a geometric shape of said desired illumination pattern and a plurality of filters at least partially overlying said opening.

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