Patent ID: 6934085

Claim:
A first surface mirror comprising: a substrate supporting a coating, wherein the coating includes at least a metallic reflective layer comprising aluminum, and a metallic layer comprising Cr that is from about 15 to 70 Å thick, wherein the metallic layer comprising Cr is located directly under and contacting the metallic reflective layer comprising aluminum in order to improve at least durability of the first surface mirror, and wherein the reflective layer reflects incoming light away from the substrate before the incoming light reaches the metallic layer comprising Cr, a low-index dielectric layer comprising silicon oxide and having an index of refraction of from about 1.4 to 1.8, located over the metallic reflective layer comprising aluminum; a high-index dielectric layer having an index of refraction of from about 2.2 to 2.6 located over the low-index dielectric layer; the first surface mirror is located in a projection television apparatus, and the first surface mirror reflects at least about 85% of incoming visible light at about 550 nm.