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US Patent 7505189 Polarizing, photochromic devices and methods of making the same

Patent 7505189 was granted and assigned to Transitions Optical on March, 2009 by the United States Patent and Trademark Office.

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Patent abstract

Provided is an optical element including:a substrate; and at least one at least partially aligned thermally reversible photochromic-dichroic compound connected to at least a portion of the substrate and having an average absorption ratio greater than 2.3 in an activated state.

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