Patent ID: 9637055
Date: 2017-05-02
CPC Classifications: B60R,G02B,G02F

Claim:
1. An interior rearview mirror assembly for a vehicle, said interior rearview minor assembly comprising: a mirror casing; a prismatic interior reflective element; wherein said prismatic interior reflective element comprises a wedge-shaped glass substrate having a first surface and a second surface and a perimeter edge about a periphery of said wedge-shaped glass substrate and extending between the first and second surfaces thereof, said wedge-shaped glass substrate having a mirror reflector established at the second surface thereof, the first surface generally facing a driver of a vehicle when said interior rearview mirror assembly is normally mounted in a vehicle equipped with said interior rearview mirror assembly; wherein a front surface of the perimeter edge provides a smooth curved transition at the perimeter edge between a perimeter region of the first surface of said wedge-shaped glass substrate and said mirror casing; said perimeter region circumscribing said wedge-shaped glass substrate; wherein the front surface of the perimeter edge is rounded by at least one of grinding and polishing to provide a generally rounded curved surface disposed between the first surface of said wedge-shaped glass substrate and said mirror casing; wherein the radius of curvature of the front surface of the perimeter edge is at least about 2.5 mm; and wherein no portion of said mirror casing encompasses the first surface of said wedge-shaped glass substrate.