Rearview mirror
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United States of America Patent
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Nov 30, 1993
Grant Date -
N/A
app pub date -
Dec 19, 1990
filing date -
Dec 19, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rearview mirror suitable for vehicles, especially motor vehicles, is composed of a transparent substrate, preferably of soda silica glass and a rear reflection coating comprising a metal mirror layer, preferably chromium, and a dielectric triple interference layer system placed between the metal mirror layer and the transparent substrate. The triple interference layer system comprises, in contact with the metal layer, a dielectric layer having a high refractive index, e.g., titanium dioxide, a next layer having a low refractive index, e.g., silicon dioxide, and next a dielectric layer having a medium refractive index, e.g., a mixed TiO.sub.2 and SiO.sub.2 layer. With the selection of suitable layer thicknesses, a total reflection of at least 40% and a blue reflection tint, independent of the viewing angle, are attained.
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