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Multifocal rain sensor

  • US 9,969,358 B2
  • Filed: 09/19/2016
  • Issued: 05/15/2018
  • Est. Priority Date: 04/07/2016
  • Status: Active Grant
First Claim
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1. A multifocal rain sensor comprising:

  • at least one light emitting unit configured to output light;

    a first reflective plate corresponding to the at least one light emitting unit and disposed at a position spaced apart from the at least one light emitting unit by a predetermined distance;

    a glass part reflecting light after the light is reflected by the first reflective plate and forming a sensing region;

    a second reflective plate re-reflecting the light reflected by the glass part; and

    a light receiving unit configured to receive the light reflected by the second reflective plate,wherein the second reflective plate includes a multifocal reflective plate having a plurality of focuses based on a vertical height of incident light that varies according to a change in thickness of the glass part.

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