US Patent No: 8,089,678

Number of patents in Portfolio can not be more than 2000

Clear to circular polarizing photochromic devices and methods of making the same

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ALSO PUBLISHED AS: 20090135462
ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

The present invention provides optical elements comprising a photochromic linear polarizing element and a birefringent layer that circularly or elliptically polarizes transmitted radiation. The photochromic linear polarizing element comprises a substrate and either: (1) a coating comprising an aligned, thermally reversible photochromic-dichroic compound having an average absorption ratio of at least 1.5 in an activated state, and being operable for switching from a first absorption state to a second absorption state in response to actinic radiation, to revert back to the first absorption state in response to thermal energy, and to linearly polarize transmitted radiation in at least one of the two states; or (2) an at least partially ordered polymeric sheet connected to the substrate; and a thermally reversible photochromic-dichroic compound that is at least partially aligned with the polymeric sheet and has an average absorption ratio greater than 2.3 in the activated state.

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First Claim

Related Publications

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TRANSITIONS OPTICAL, INC.PINELLAS PARK, FL128

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Blackburn, Forrest R Allegheny County, PA 38 81
Foller, Peter C Murrysville, PA 52 229
Furar, Elizabeth - 3 1
Kumar, Anil Allegheny County, PA 219 1683

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Other [Check patent profile for assignment information] (5)
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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
ALLIANT TECHSYSTEMS INC. (1)
8,354,641 Neutron detection by neutron capture-initiated relaxation of a ferroelectrically, ferromagnetically, and/or chemically metastable material 0 2012

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