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
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.