Photochromic articles that include photochromic-dichroic materials
A photochromic material and photochromic technology, applied in the direction of color-changing fluorescent materials, photosensitive materials, optics, etc., can solve the problems of reducing glare that cannot be reflected
Active Publication Date: 2015-12-09
TRANSITIONS OPTICAL INC
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Problems solved by technology
Therefore, conventional photochromic elements cannot reduce reflected glare to the same extent as conventional linear polarizing elements
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[0524] The present invention is more specifically described in the following examples, which are for illustrative purposes only since numerous modifications and variations therein will be apparent to those skilled in the art.
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Abstract
The present invention relates to photochromic articles that include a substrate and at least one photochromic material that is adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 450 nanometers when measured over a range of from 380 to 700 nanometers. The photochromic article is also adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test. The photochromic material can be selected from certain compounds including, for example, fluoranthenoxazines, naphthopyrans, phenanthropyrans, fluoranthenopyrans, and indenonaphthopyrans, which each have bonded thereto at least one chiral or achiral lengthening group that provides the photochromic compound with dichroic properties. The present invention also relates to methods of forming a photochromic article.
Description
field of invention [0001] The present invention relates to photochromic articles comprising a substrate and one or more photochromic-dichroic materials each comprising at least one chiral or achiral lengthening group group, and when the ultraviolet radiation blocking transparency is interposed between the photochromic article and the source of actinic radiation, it has photochromic activity. Background of the invention [0002] Conventional linear polarizing elements, such as linear polarizing lenses used in sunglasses and linear polarizing filters, are typically formed from stretched polymer sheets containing dichroic materials such as dichroic dyes. Thus, a conventional linearly polarizing element is a static element with a single linear polarization state. Thus, when a conventional linearly polarizing element is exposed to randomly polarized radiation of the appropriate wavelength or reflects radiation, some percentage of the radiation transmitted through the element wil...
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IPC IPC(8): C09K9/02G02B5/23G02C7/10G03C1/73
CPCC09K9/02C09K2211/1029C09K2211/1033C09K2211/1088G02B1/043G02B5/23G02C7/102G03C1/685G03C1/73C08L33/10C08L83/04G02B1/10B60J3/007G03C1/695G02B5/208G02B5/223
Inventor R·L·德美欧A.·库玛何猛D·R·达比迪恩S·蒙达尔
Owner TRANSITIONS OPTICAL INC
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