Visibly transparent infrared reflecting film with color masking
First Claim
1. A substantially colorless polymeric multilayered film having at least two major surfaces and which reflects a majority of light in the infrared region of the spectrum while transmitting a majority of light in the visible region of the spectrum comprising, multiple alternating layers of at least two diverse, substantially transparent polymeric materials which differ in refractive index by at least about 0.03, said layers having an optical thickness of between about 0.09 μ
- m and 0.45 μ
m and each of said polymeric materials having a different index of refraction such that said film reflects light in the infrared portion of the spectrum, and means associated with said film for masking any iridescent visible color reflected from said layers such that there is an absence of visibly perceived color reflected from said film, said color masking means comprise a sufficient number of alternating layers of substantially transparent diverse polymeric materials, a substantial majority of said layers having an optical thickness of not less than 0.45 μ
m or not greater than 0.09 μ
m.
3 Assignments
0 Petitions
Accused Products
Abstract
A polymeric multilayered film which reflects wavelengths of light in the infrared region of the spectrum while being substantially transparent to wavelengths of light in the visible spectrum without the effects of visibly perceived iridescent color is provided. The polymeric multilayered infrared reflecting film comprises at least two diverse, substantially transparent polymeric materials, with the layers having an optical thickness of between 0.09 μm and 0.45 μm and the polymeric materials having a different index of refraction such that light is reflected in the infrared portion of the spectrum. A color masking film is associated with the polymeric film which reflects light substantially uniformly over the visible portion of the spectrum to eliminate perceived iridescent color.
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Citations
20 Claims
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1. A substantially colorless polymeric multilayered film having at least two major surfaces and which reflects a majority of light in the infrared region of the spectrum while transmitting a majority of light in the visible region of the spectrum comprising, multiple alternating layers of at least two diverse, substantially transparent polymeric materials which differ in refractive index by at least about 0.03, said layers having an optical thickness of between about 0.09 μ
- m and 0.45 μ
m and each of said polymeric materials having a different index of refraction such that said film reflects light in the infrared portion of the spectrum, and means associated with said film for masking any iridescent visible color reflected from said layers such that there is an absence of visibly perceived color reflected from said film, said color masking means comprise a sufficient number of alternating layers of substantially transparent diverse polymeric materials, a substantial majority of said layers having an optical thickness of not less than 0.45 μ
m or not greater than 0.09 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16, 17, 18, 19, 20)
- m and 0.45 μ
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9. A substantially colorless polymeric multilayered film having at least two major surfaces and which reflects a majority of at least two major surfaces and which reflects a majority of light in the infrared region of the spectrum while transmitting a majority of light in the visible region of the spectrum comprising, multiple alternating layers of first (A), second (B), and third (C) diverse substantially transparent polymeric materials which differ in refractive index by at least about 0.03, said layers having an optical thickness of between about 0.09 μ
- m and 0.45 μ
m and each of said polymeric materials having a different index of refraction such that said film reflects light in the infrared portion of the spectrum, andmeans associated with said film for masking any iridescent visible color reflected from said layers such that there is an absence of visibly perceived color reflected from said film. - View Dependent Claims (10, 11, 12, 13, 14, 15)
- m and 0.45 μ
Specification