Aromatic polycarbonate polarising lens

Abstract

Provided is a polarizing lens which is excellent in terms of impact resistance, outer appearance and prevention of eye strain and which exhibits little variation in color tone and transmittance during formation. The polarizing lens is formed by stretching a polyvinyl alcohol film and dyeing it with a dichroic dye, bonding an aromatic polycarbonate sheet to both surfaces of the film by means of an adhesive layer, and then inserting a polarizing sheet, bent to have a spherical or aspherical surface, into a mold, and injecting aromatic polycarbonate thereto, wherein the area in which the dichroic dye seeps from the surface of the polyvinyl alcohol film is not more than a quarter of the thickness of the polyvinyl alcohol film.

1 . A polarizing lens, which is formed by stretching a polyvinyl alcohol film and dyeing the film with a dichroic dye, bonding an aromatic polycarbonate sheet to both surfaces of the film via an adhesive layer and bending the obtained product to have a spherical or aspherical surface, wherein the area in which the dichroic dye seeps from the surface of the polyvinyl alcohol film is not more than a quarter of the thickness of the polyvinyl alcohol film, and wherein the central portion in the thickness direction of the polyvinyl alcohol film is not dyeing with the dichroic dye. 
     
     
         2 . A polarizing lens, which is formed by stretching a polyvinyl alcohol film and dyeing the film with a dichroic dye, bonding an aromatic polycarbonate sheet to both surfaces of the film via an adhesive layer, bending the obtained product to have a spherical or aspherical surface and injecting an aromatic polycarbonate to one of the surfaces of the polarizing sheet, wherein the area in which the dichroic dye seeps from the surface of the polyvinyl alcohol film is not more than a quarter of the thickness of the polyvinyl alcohol film, and wherein the central portion in the thickness direction of the polyvinyl alcohol film is not dyeing with the dichroic dye.