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AssigneeHRL Laboratories, LLC
InventorsAdam F. Gross, Ashley M. Dustin, Andrew P. Nowak, April R. Rodriguez
Estimating the term…
Infrared-transparent polymers, useful for LWIR and/or MWIR transparency, are disclosed. The disclosed infrared-transparent polymers are low-cost, damage-resistant, and economically scalable to commercially relevant substrate areas (1 ft2 and greater). In some disclosed infrared-transparent polymers, the carbon-free polymer backbone contains a plurality of polymer repeat units of the form wherein R1 is selected from the group consisting of alkyls, hydroxyl, amino, urea, thiol, thioether, amino alkyls, carboxylates, metals, metal-containing groups, and deuterated forms or combinations thereof; wherein R2 is (independently from R1) selected from the group consisting of alkyls, hydroxyl, amino, urea, thiol, thioether, amino alkyls, carboxylates, metals, metal-containing groups, and deuterated forms or combinations thereof; wherein n is selected from 2 to about 10,000; and wherein the carbon-free polymer backbone is linear, cyclic, branched, or a combination thereof.
An infrared-transparent polymer having a carbon-free polymer backbone, wherein said infrared-transparent polymer is characterized by a density from about 1.2 g/cm3 to about 1.9 g/cm3, an index of refraction from about 1.3 to about 1.9, and at least 70% average transmission of radiation at wavelengths from 3.1 μm to 5 μm and/or from 8.1 μm to 12 μm, wherein said average transmission is defined as the ratio (expressed as a percentage) of radiation intensity through an infrared-transparent polymer thickness of 25 microns divided by incident radiation intensity,
An infrared-transparent polymer containing a plurality of polymer repeat units of the form
Dependencies are inferred from the claim text.