Multilayer infrared reflecting film with high and smooth transmission in visible wavelength region and laminate articles made therefrom
First Claim
1. A multilayer film article comprising:
- an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type bounded by one or more non-optical layers; and
an infrared light absorbing or reflecting layer disposed on at least one of the non-optical layers of the multilayer film;
wherein the infrared light reflecting multilayer film is adapted to reflect at least 50% of light in a band at least 100 nm wide positioned between wavelengths from about 700 nm to about 2000 nm.
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Abstract
A multilayer film article is disclosed. The film includes an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type and an infrared light absorbing or reflecting layer adjacent the multilayer film. The film includes a multilayer stack composed of alternating optical layers of first and second diverse polymers A, B. The optical layers when counted from one end of a first effective optical packet form a plurality of unit cells each having six optical layers arranged in relative optical thicknesses in a first cyclic permutation of 7A1B1A7B1A1B. At normal incidence the first effective optical packet provides a reflection band at infrared wavelengths and substantially transmits light at visible wavelengths.
74 Citations
15 Claims
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1. A multilayer film article comprising:
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an infrared light reflecting multilayer film having alternating layers of a first polymer type and a second polymer type bounded by one or more non-optical layers; and an infrared light absorbing or reflecting layer disposed on at least one of the non-optical layers of the multilayer film; wherein the infrared light reflecting multilayer film is adapted to reflect at least 50% of light in a band at least 100 nm wide positioned between wavelengths from about 700 nm to about 2000 nm. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An optical body comprising at least a first effective optical packet of contiguous optical layers bounded by optically thick layers, the optical layers composed of alternating diverse materials A,B and an infrared light absorbing or reflecting layer is disposed on at least one of the optically thick layers;
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wherein the optical layers when counted from one end of the first effective optical packet form a plurality of unit cells each having six optical layers arranged in relative optical thicknesses in a first cyclic permutation of 7A1B1A7B1A1B; and wherein at normal incidence the first effective optical packet provides a reflection band at infrared wavelengths and substantially transmits light at visible wavelengths. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification