Patent ID: 6196688
Filing Date: 2001-03-06
Classification: B60R,G02B

Abstract:
A high luminous reflectance mirrored substrate comprising:a glass substrate having first and second surfaces:a reflector coated upon said first surface of said glass substrate, said first surface adapted to face 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 closest to said first surface of said glass substrate and has a refractive index of greater than 3.0, a second thin film layer which is farthest from said first surface of said glass substrate, and 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 on at least one of a surface of said glass substrate and a layer of said reflector, said light absorbing coating absorbing light transmitted by said reflector coated substrate.