Spectral filtering for vehicular driver assistance systems

  • US 10,027,930 B2
  • Filed: 03/28/2014
  • Issued: 07/17/2018
  • Est. Priority Date: 03/29/2013
  • Status: Active Grant
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First Claim
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1. A vision system of a vehicle, said vision system comprising:

  • a camera disposed behind a windshield of a vehicle equipped with said vision system, said camera comprising a lens and an imaging array;

    wherein said camera views forward of the equipped vehicle and through the windshield of the equipped vehicle;

    wherein said imaging array captures image data;

    wherein said imaging array comprises a two dimensional array of columns and rows of photosensing pixels;

    wherein said two dimensional array comprises a plurality of sub-arrays;

    wherein light is imaged at said plurality of sub-arrays via said lens of said camera;

    wherein a sub-array of said plurality of sub-arrays comprises a first pixel, a second pixel and a third pixel, and wherein said first pixel is adjacent to said second pixel and wherein said second pixel is adjacent to said third pixel;

    a deflection microsplitting spectral filter is disposed in front of said second pixel of said sub-array;

    wherein a deflection microsplitting spectral filter is not disposed in front of said first and third pixels of said sub-array;

    wherein light emanating from external the equipped vehicle and passing through the windshield is incident at said lens and passes through said deflection microsplitting spectral filter and is split so that (i) light within a first spectral band is imaged at said first pixel of said sub-array, (ii) light within a second spectral band is imaged at said second pixel of said sub-array and (iii) light within a third spectral band is imaged at said third pixel of said sub-array;

    a vehicle control having an image processor, wherein said image processor is operable to process image data captured by said imaging array; and

    wherein, responsive at least in part to processing of captured image data by said image processor, said control is operable to control a driver assistance system of the equipped vehicle.

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