Optical element for a vehicle windshield
First Claim
1. An optical element for a motor vehicle windshield comprising, in combination:
- (a) an interference filter which includes one or more light-reflecting metal layers and one or more reflection-suppressing layers for coacting with the one or more metal layers to minimize reflection and enhance transmission in the visible region;
(b) a gradient band continuation of said interference filter above the direct line of vision through a windshield when disposed in a motor vehicle for reflective rejection of infra-red solar energy, said band including a light-reflecting metal layer gradually increasing in thickness toward a lateral edge of said band;
(c) a transparent substrate supporting said filter and gradient band;
(d) plural bus bars substantially parallel to said lateral edge in electrical contact with one or more metal layers of the interference filter and the metal layer of the gradient band continuation.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical element for a motor vehicle windshield comprises, in combination, an interference filter having one or more light-reflecting metal layers and one or more reflection-suppressing layers for coacting with the one or more metal layers to minimize reflection and enhance transmission in the visible region, a gradient band continuation of the interference filter above the direct line of forward vision through a windshield when disposed in a motor vehicle for reflective rejection of infra-red solar energy, such band including a light-reflecting metal layer gradually increasing in thickness toward a lateral edge of the band, a transparent substrate supporting such filter and gradient band and plural bus bars substantially parallel to the lateral edge of the gradient band in electrical contact with the metal layers of the interference filter and the gradient band continuation.
51 Citations
12 Claims
-
1. An optical element for a motor vehicle windshield comprising, in combination:
-
(a) an interference filter which includes one or more light-reflecting metal layers and one or more reflection-suppressing layers for coacting with the one or more metal layers to minimize reflection and enhance transmission in the visible region; (b) a gradient band continuation of said interference filter above the direct line of vision through a windshield when disposed in a motor vehicle for reflective rejection of infra-red solar energy, said band including a light-reflecting metal layer gradually increasing in thickness toward a lateral edge of said band; (c) a transparent substrate supporting said filter and gradient band; (d) plural bus bars substantially parallel to said lateral edge in electrical contact with one or more metal layers of the interference filter and the metal layer of the gradient band continuation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An optical element for a motor vehicle windshield comprising, in combination:
-
(a) an interference filter interposed in the direct line of vision through a windshield when said optical element is disposed therein in a motor vehicle, comprising two or more light-reflecting metal layers, each surface of which is contiguous with a dielectric layer; (b) an integral gradient band extension increasing in thickness toward a lateral edge of said element; (c) a transparent substrate supporting said filter and extension; and (d) plural conducting members parallel to said lateral edge in electrically conductive contact with metal layers of the interference filter and gradient band extension; whereby on supplying electrical power to said optical element, conductivity through the interference filter will be greater than through the gradient band extension. - View Dependent Claims (10, 11, 12)
-
Specification