G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 1/10 (2006.01) C03C 17/23 (2006.01) C03C 17/34 (2006.01) C03C 17/42 (2006.01) C23C 16/40 (2006.01) G02B 1/11 (2006.01) G02B 5/20 (2006.01)
Patent
CA 2068447
ABSTRACT OF THE DISCLOSURE A substantially transparent glazing article has an optically functional coating on a transparent substrate. The coating has an optically functional topcoat layer and an anti-iridescence layer between the topcoat and the substrate. The refractive index anti-iridescence layer is (i) higher than the refractive index of the substrate in a first high refractive index zone directly on the substrate surface, (ii) lower than that of the first high refractive index zone in a low refractive index zone directly on the first high refractive index zone, and (iii) higher than that of the low refractive index zone in a second high refractive index zone directly on the low refractive index zone. The refractive index of the anti-iridescence layer varies in at least one of the zones substantially continuously with distance from the substrate surface. Contiguous zones may together form a single gradient index zone. The anti-iridescence layer is less thick than the optically functional layer and substantially reduces or eliminates iridescence without significantly impairing the optical functionality of the top coat layer. -30-
Ford Motor Company Of Canada Limited
Sim & Mcburney
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