Anti-reflective, thermally insulated glazing articles
AssigneePilkington North America, Inc.
InventorsSrikanth Varanasi, David A. Strickler
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Abstract
A laminated glass unit having at least two sheets of glass separated and bonded by a polymeric interlayer material, and further having multi-layer thin film coatings on each of the unbonded surfaces of the at least two glass sheets, is disclosed. Two or more of such laminated glass units can be utilized in various configurations to form an insulated glass unit. The thin films deposited on the unbonded glass surfaces have anti-reflective, iridescence-suppressing and solar control properties when suitable configurations, materials and layer thicknesses are chosen. The laminated glass unit and insulated glass units of the invention exhibit an excellent combination of low visible light reflectance and thermal insulating properties.
Claims14
An insulated glass unit comprising:
- at least first and second laminated glass units, the at least first and second laminated glass units being parallel to and separated from each other, and each having a first and a second major surface;
- a first coating stack deposited on the first major surface of the first laminated glass unit comprising an electrically conductive inorganic metal oxide layer and an inorganic dielectric oxide layer;
- a second coating stack deposited on the second major surface of the first laminated glass unit comprising an electrically conductive inorganic metal oxide layer and an inorganic dielectric oxide layer;
- a third coating stack deposited on the first major surface of the second laminated glass unit comprising an electrically conductive inorganic metal oxide layer and an inorganic dielectric oxide layer;
- and
- a fourth coating stack deposited on the second major surface of the second laminated glass unit comprising an electrically conductive inorganic metal oxide layer and an inorganic dielectric oxide layer;
- wherein each of the electrically conductive metal oxide layers of the first through fourth coating stacks have a refractive index >1.8, and each of the inorganic dielectric oxide layers of the first through fourth coating stacks have a refractive index <1.6;
- the first, second, third, and fourth coating stacks each having an emissivity ≧0.4 and ≦0.5, and the insulated glass unit exhibiting a visible light reflectance of <4% and a center-of-glass U value of <0.35.
Dependencies are inferred from the claim text.