Exterior mirror element with auxiliary reflector portion

  • US 8,459,809 B2
  • Filed: 09/17/2012
  • Issued: 06/11/2013
  • Est. Priority Date: 05/23/2007
  • Status: Active Grant
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First Claim
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1. A mirror reflective element suitable for use in an exterior rearview mirror assembly of a vehicle, said mirror reflective element comprising:

  • a glass substrate having a first surface and a second surface;

    wherein said glass substrate has a thickness between said first surface and said second surface of less than 3 millimeters;

    wherein said mirror reflective element has a principal reflector portion and an auxiliary reflector portion;

    wherein said auxiliary reflector portion comprises a curved recess established at said second surface of said glass substrate by at least one of grinding and ablating;

    wherein said curved recess has a cross-dimension size that is in the range from about 30 millimeters to about 80 millimeters;

    wherein said curved recess comprises a radius of curvature that is in the range from about 200 millimeters to about 1,000 millimeters;

    wherein said curved recess has a maximum recess depth that is in the range from about 0.11 millimeters to about 2.26 millimeters;

    a metallic reflector established at said curved recess;

    a principal mirror reflector established at said principal reflector portion; and

    wherein said mirror reflective element comprises one of (a) an electrochromic mirror reflective element having a front substrate and rear substrate, and wherein an electrochromic medium is disposed between said front and rear substrates, and wherein said electrochromic medium is bounded by a seal, and wherein said glass substrate comprises said front substrate, and wherein said principal mirror reflector is established at a surface of said rear substrate, and (b) a fixed reflectance non-electro-optic mirror reflective element and wherein said principal mirror reflector is established at said second surface of said glass substrate.

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