The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2020
Filed:
Jan. 22, 2019
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Mgc Filsheet Co., Ltd., Saitama, JP;
Terutaka Tokumaru, Tokyo, JP;
Hideaki Kimura, Saitama, JP;
Masayuki Akaki, Saitama, JP;
Kyousuke Nakamura, Tokyo, JP;
MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;
MGC FILSHEET CO., LTD., Saitama, JP;
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.