Pane with transmission properties that vary with the angle of incidence
AssigneeSaint-Gobain Vitrage International
InventorsPhilippe Marcquart, Claude Bernard
Life of this patent
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Abstract
This invention concerns a pane having a film, the light transmission of which varies as a function of the direction of the incident light. The deposition technique is cathodic sputtering. It uses, between the cathode 1 and the substrate 4, a guide 6 which channels the particles.
Claims7
A pane comprising a transparent substrate and a film comprising metal or metal oxide thereon, wherein the axes of growth of said film are parallel to straight lines contained within an acute dihedral angle as viewed from points on the substrate.
A pane comprising a transparent substrate and a film comprising metal or metal oxide upon said substrate, the said film comprising metal or metal oxide being characterized by having axes of growth of the metal of the film comprising metal or metal oxide parallel to straight lines intersecting the substrate and contained within an acute dihedral angle as viewed from points on the substrate, the dihedral angle being so oriented that its bisector plane forms with the plane of the substrate an angle less than 40.degree., the said substrate surface being a planar surface or a convex surface and being geometrically characterized by a plane termed the plane of the substrate which is a plane parallel to said planar surface or is a plane which forms a base plane for said convex surface.
Dependencies are inferred from the claim text.