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US 6,650,478 B1Granted
Optical filter for a window
AssigneeCPFilms Inc.
InventorsSteven DeBusk, Peter Maschwitz
Life of this patent
Estimating the term…
Abstract
An optical filter in the form of a film which can be used in a window to control the amount of absorbed light, reflected light, transmitted light and solar energy rejection. The optical filter contains a unique combination of an interfering Fabry-Perot stack and a massive Fabry-Perot stack.
Claims20
A multi-layered optical filter for a window which comprises the layer sequence:
- first metal or metal compound/first dielectric/second metal or metal compound/second dielectric/third metal or metal compound wherein the layers:
- first metal or metal compound/first dielectric/second metal or metal compound constitute a first stack which is an interference Fabry-Perot stack wherein said first dielectric is configured to function as an interfering dielectric within said Fabry-Perot stack, and the layers:
- second metal or metal compound/second dielectric/third metal or metal compound constitute a second stack wherein said second dielectric is configured so that said second stack provides a reflection which is perceived as neutral and said second dielectric is a layer which is laminated to said second metal or metal compound of said first stack;
- said second metal or metal compound being shared by said interference Fabry-Perot stack and said second stack;
- said layer sequence being adhered to a transparent substrate;
- and one of said first, second, and third metal or metal compound layers being a solar energy absorbing metal or metal compound layer;
- one of said first, second and third metal or metal compound layers being an infrared reflecting metal layer and one of said first, second and third metal or metal compound layers being either a solar energy absorbing metal or metal compound layer or an infrared reflecting metal layer.
4 more elements
A multi-layered optical filter for a window which comprises the layer sequence:
- first metal or metal compound/first dielectric/second metal or metal compound/second dielectric/third metal or metal compound wherein the layers:
- first metal or metal compound/first dielectric/second metal or metal compound constitute a first stack which is an interference Fabry-Perot stack wherein said first dielectric is configured to function as an interfering dielectric within said Fabry-Perot stack, and the layers:
- second metal or metal compound/second dielectric/third metal or metal compound constitute a second stack wherein said second dielectric has a thickness greater than 0.7 microns;
- said second metal or metal compound being shared by said interference Fabry-Perot stack and said second stack;
- said layer sequence being adhered to a transparent substrate;
- and one of said first, second, and third metal or metal compound layers being a solar energy absorbing metal or metal compound layer;
- one of said first, second and third metal or metal compound layers being an infrared reflecting metal layer and one of said first, second and third metal or metal compound layers being either a solar energy absorbing metal or metal compound layer or an infrared reflecting metal layer.
4 more elements
A multi-layered optical filter for a window which comprises the layer sequence:
- first metal or metal compound/first dielectric/second metal or metal compound/second dielectric/third metal or metal compound wherein the layers:
- first metal or metal compound/first dielectric/second metal or metal compound constitute a first stack which is an interference Fabry-Perot stack wherein said first dielectric is configured to function as an interfering dielectric within said Fabry-Perot stack, and the layers:
- second metal or metal compound/second dielectric/third metal or metal compound constitute a second stack wherein said second dielectric has a quarter wave optical thickness of at least 7;
- said second metal or metal compound being shared by said interference Fabry-Perot stack and said second stack;
- said layer sequence being adhered to a transparent substrate;
- and one of said first, second, and third metal or metal compound layers being a solar energy absorbing metal or metal compound layer;
- one of said first, second and third metal or metal compound layers being an infrared reflecting metal layer and one of said first, second and third metal or metal compound layers being either a solar energy absorbing metal or metal compound layer or an infrared reflecting metal layer.
4 more elements
Dependencies are inferred from the claim text.