All-polymeric cold mirror
AssigneeThe Dow Chemical Company
InventorsJohn A. Wheatly, Gregg A. Motter
Life of this patent
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Abstract
An all-polymeric cold mirror which reflects visible wavelengths while transmitting a substantial portion of infrared wavelengths is provided. The mirror includes a sufficient number of alternating layers of at least first and second diverse polymeric materials such that at least 50% of peak reflecting visible light of a wavelength of between about 380-680 nm incident on the mirror is reflected and at least 50% of infrared light between about 680-2000 nm is transmitted or absorbed. The mirror may be designed so that it either reflects or absorbs ultraviolet light.
Claims25
An all polymeric cold mirror of at least first and second diverse polymeric materials, the mirror comprising a sufficient number of alternating layers of said first and second polymeric materials such that at least 50% of light across the visible range of wavelengths between about 380-680 nm incident on said polyemric cold mirror is reflected and at least 80% of infrared light of wavelengths of between about 680-2000 nm is transmitted or absorbed, said alternating layers of said first and second polymeric materials having a layer thickness gradient across the thickness of said mirror.
Dependencies are inferred from the claim text.