Patent ID: 6065840
Filing Date: 2000-05-23
Classification: B60R,G02B

Abstract:
A high luminous reflectance mirrored substrate comprising:a glass substrate having first and second surfaces:a reflector coated upon said second surface of said glass substrate, said second surface adapted to face away from a source of light to be reflected;said reflector comprising a multilayer thin film stack comprising a first thin film layer of an elemental semiconductor which is farthest from said second surface of said glass substrate and has a refractive index of greater than 3.0, a second thin film layer which is closest to said second surface of said glass substrate, a third thin film layer disposed between said first thin film layer and said second thin film layer, said third thin film layer having a refractive index between about 1.3 and 2.7, said second thin film layer having a refractive index greater than said third thin film layer;said reflector having a light reflectance of at least about 60% of light incident thereon at the wavelength region of about 550 nanometers and being achromatic; anda light absorbing coating disposed on said reflector coated second surface of said glass substrate.