Exterior mirror element with wide angle portion

  • US 7,934,844 B1
  • Filed: 12/17/2010
  • Issued: 05/03/2011
  • 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;

    a principal planar reflector portion and an auxiliary wide angle curved portion;

    wherein said principal planar reflector portion comprises a principal mirror reflector established at said glass substrate;

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

    wherein said auxiliary wide angle curved portion comprises an auxiliary mirror reflector established at said curved recess;

    wherein said first surface of said glass substrate comprises a generally planar surface;

    wherein, other than at said curved recess, said second surface of said glass substrate comprises a generally planar surface;

    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; and

    wherein said curved recess has a maximum recess depth that is in the range from about 0.11 millimeters to about 4.04 millimeters.

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