Exterior mirror element with auxiliary reflector portion

  • US 8,608,326 B2
  • Filed: 06/03/2013
  • Issued: 12/17/2013
  • Est. Priority Date: 05/23/2007
  • Status: Active Grant
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First Claim
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1. A mirror reflector sub-assembly suitable for use in an exterior rearview mirror assembly of a vehicle, said mirror reflector sub-assembly comprising:

  • a mirror reflective element;

    said mirror reflective element comprising a glass substrate having a first surface and a second surface;

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

    wherein said principal reflector portion of said mirror reflective element has a first radius of curvature;

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

    wherein said curved recess of said auxiliary reflector portion of said mirror reflective element has a second radius of curvature;

    wherein said second radius of curvature is smaller than said first radius of curvature;

    wherein said curved recess has a cross-dimension size that is less than about 80 millimeters;

    wherein said second radius of curvature of said curved recess comprises a radius of curvature that is less than about 1,000 millimeters;

    wherein said curved recess has a maximum recess depth that is less than about 2.26 millimeters;

    a reflector established at said curved recess;

    a principal mirror reflector established at said principal reflector portion;

    wherein said mirror reflective element is supported at a side of a mirror back plate and wherein an opposing side of said mirror back plate is adapted for attaching said mirror back plate to a mirror actuator;

    wherein a heater pad is disposed at said second surface of said glass substrate between said mirror reflective element and said mirror back plate; and

    wherein said mirror reflective element comprises 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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