Glass pane with reflectance reducing coating

A coated glass pane, comprising a transparent glass substrate and a reflectance reducing coating formed on a major surface of the glass substrate, the reflectance reducing coating being a three-layer coating comprising:

• a first layer which is a transparent oxide film in direct contact with said major surface of said substrate and has a thickness of 70-100 nm and a refractive index in the range from 1.80 to 1.90,
• a second layer which is a transparent oxide formed on said first layer and has a thickness of 130-160 nm and a refractive index in the range from 2.05 to 2.30, and
• a third layer which is a transparent oxide film formed on said second layer and has a thickness of 110-130 nm and a refractive index in the range from 1.40 to 1.50,
• said coating being constructed such that, with respect to visible light incident on said coating from the coated side of the coated glass pane at an incidence angle in the range from 50 to 70 degrees, the reflectance of the coated glass pane is lower than the reflectance of said glass substrate without coating by 4.5 to 6.5%;
• wherein said first layer of said coating is a mixed oxide film comprising at least one relatively high refractivity oxide selected from the group consisting of TiO.sub.2 and ZrO.sub.2 and at least one relatively low refractivity oxide selected from the group consisting of SiO.sub.2, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 ;
• wherein said second layer of coating is a film comprising at least one member selected from the group consisting of TiO.sub.2, Ta.sub.2 O.sub.5, and a combination of at least one member selected from the group consisting of TiO.sub.2 and Ta.sub.2 O.sub.5 and at least one member selected from the group consisting of SiO.sub.2, ZrO.sub.2, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 ;
• and
• wherein said third layer of said coating is a SiO.sub.2 film.

A coated glass pane, comprising a transparent glass substrate and a reflectance reducing coating formed on a major surface of the glass substrate, the reflectance reducing coating being a three-layer coating comprising:

• a first layer which is a transparent oxide film in direct contact with said major surface of said substrate and has a thickness of 70-100 nm and a refractive index in the range from 1.80 to 1.90,
• a second layer which is a transparent oxide film formed on said first layer and has a thickness of 130-160 nm and a refractive index in the range from 2.05 to 2.30, and
• a third layer which is a transparent oxide film formed on said second layer and has a thickness of 110-130 nm and a refractive index in the range from 1.40 to 1.50,
• said coating being constructed such that, with respect to visible light incident on said coating from the coated side of the coated glass pane at an incidence angle in the range from 50 to 70 degrees, the reflectance of the coated glass pane is lower than the reflectance of said glass substrate without coating by 4.5 to 6.5%,
• wherein said first layer of said coating is a mixed oxide film comprising at least one relatively high refractivity oxide selected from the group consisting of TiO.sub.2 and ZrO.sub.2 and at least one relatively low refractivity oxide selected from the group consisting of SiO.sub.2, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 ;
• and
• said second layer of said coating is a film comprising at least one member selected from the group consisting of TiO.sub.2, Ta.sub.2 O.sub.5, and a combination of at least one member selected from the group consisting of TiO.sub.2 and Ta.sub.2 O.sub.5 and at least one member selected from the group consisting of SiO.sub.2, ZrO.sub.2, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3.