Henry C Nguyen

US Patent:

8545015, Oct 1, 2013

Filed:

Nov 15, 2011

Appl. No.:

13/296867

Inventors:

Anil Kumar - Murrysville PA, US
Rachael L. Yoest - Gibsonia PA, US
Chenguang Li - Monroeville PA, US
Delwin S. Jackson - Clearwater FL, US
Henry Nguyen - Largo FL, US

Assignee:

Transitions Optical, Inc. - Pinellas Park FL

International Classification:

G02C 3/00
G02B 5/30
G02B 5/23

US Classification:

35115961, 35948701, 35949201

Abstract:

Provided are photochromic articles including a substrate, a primer layer that includes a first photochromic compound, and a photochromic-dichroic layer over the primer layer that includes a photochromic-dichroic compound. The first photochromic compound and the photochromic-dichroic compound each are selected such that the photochromic-dichroic compound has an unactivated state terminal minimum absorbance wavelength that is less than or equal to the unactivated state terminal minimum absorbance of the underlying first photochromic compound. The present invention also relates to such photochromic articles that further include a topcoat layer over the photochromic-dichroic layer, the topcoat layer including a second photochromic compound that has an unactivated state terminal minimum absorbance wavelength that is less than the unactivated state terminal minimum absorbance wavelength of the underlying photochromic-dichroic compound.

US Patent:

8582192, Nov 12, 2013

Filed:

Jun 6, 2011

Appl. No.:

13/153748

Inventors:

Anil Kumar - Murrysville PA, US
Rachael L. Yoest - Gibsonia PA, US
Chenguang Li - Monroeville PA, US
Delwin S. Jackson - Clearwater FL, US
Henry Nguyen - Largo FL, US

Assignee:

Transitions Optical, Inc. - Pinellas Park FL

International Classification:

G02F 1/03

US Classification:

359241

Abstract:

Provided are photochromic articles that include a substrate, a primer layer that includes a first photochromic compound, and a photochromic-dichroic layer over the primer layer that includes a photochromic-dichroic compound. The first photochromic compound and the photochromic-dichroic compound each are selected such that the photochromic-dichroic compound has an absorbance of less than or equal to 0. 1 at the wavelength of peak absorbance of the underlying first photochromic compound. The present invention also relates to such photochromic articles that further include a topcoat layer over the photochromic-dichroic layer. The topcoat layer can include a second photochromic compound that has an absorbance of less than 0. 1 at the wavelength of peak absorbance of the underlying photochromic-dichroic compound. The photochromic articles provide, for example, a combination of linear polarizing properties, and reduced percent transmittance when in a colored or darkened state, such as when exposed to actinic light.

US Patent:

20140078583, Mar 20, 2014

Filed:

Sep 14, 2012

Appl. No.:

13/616591

Inventors:

Rachel L. DeMeio - Gibsonia PA, US
Anil Kumar - Murrysville PA, US
John S. Ligas - Palm Harbor FL, US
Truman Wilt - Clinton PA, US
Delwin S. Jackson - Clearwater FL, US
Henry Nguyen - Largo FL, US

Assignee:

Transitions Optical, Inc. - Pinellas Park FL

International Classification:

G02B 5/30

US Classification:

35948702, 35948701

Abstract:

Photochromic-dichroic articles are provided, which include a substrate having a first surface, a fixed-polarized layer over the first surface of the substrate, and a photochromic-dichroic layer over the first surface of the substrate. The fixed-polarized layer optionally includes a fixed-colorant and has a first polarization axis. The photochromic-dichroic layer includes a photochromic-dichroic compound that is laterally aligned within the photochromic-dichroic layer, and which defines a second polarization axis. The first polarization axis and the second polarization axis are oriented relative to each other at an angle of greater than 0 and less than or equal to 90. The photochromic-dichroic articles can provide, for example, increased optical density and/or increased kinetics when exposed to a given amount of actinic radiation.