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Imaging rain sensor illumination positioning system

  • US 20020148987A1
  • Filed: 04/16/2001
  • Published: 10/17/2002
  • Est. Priority Date: 04/16/2001
  • Status: Active Grant
First Claim
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1. A method for sensing moisture on the exterior surface of a sheet of glass (14) comprising the steps of;

  • emitting light rays from an illuminator (12) on an illuminator axis (I) intersecting the glass (14) at an illuminator angle of incidence to reflect the light rays on a reflection axis at an angle of reflection to the glass, capturing on an imaging axis (C) the reflected light rays including reflections of moisture on the exterior surface of the glass, said method characterized by isolating the reflection of moisture from the direct reflection of the illuminator (12) to prevent the capture of the direct reflection of the illuminator (12).

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