Moisture sensor and windshield fog detector using an image sensor

  • US 5,923,027 A
  • Filed: 09/16/1997
  • Issued: 07/13/1999
  • Est. Priority Date: 09/16/1997
  • Status: Expired due to Term
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First Claim
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1. A system for detecting moisture on a surface comprising:

  • an image sensor;

    an optical system operable to image a portion of the surface onto the image sensor, to focus objects at the surface onto the image sensor, and to blur objects away from the surface; and

    a processor in communication with the image sensor, the processor operative to determine spatial composition of the image whereby a signal may be generated based on the determined spatial composition.

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