Colored polarizing films, colored polarizing sheets, and colored polarizing lenses, and methods thereof

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United States of America Patent

PATENT NO 9897823
SERIAL NO

14422730

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Abstract

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A polarizing film is produced by swelling a polyvinyl alcohol film with water, uniaxially stretching it, dyeing it with an organic dichroic dye, and drying it, wherein a dichroic organic dye composition includes a combination of organic dyes having a dichroic ratio of 13 or higher used in an amount to keep the degree of polarization at 90% or more, and wherein the coloration dye composition comprises a combination of dyes having extremely low dichroic ratios of 4 or less or substantially having no dichroic ratio, laminating at least one layer of a transparent plastic sheet onto at least both sides of the polarizing film, curving the polarizing sheet so as to impart spherical or aspherical surfaces thereto to obtain a polarizing and injecting a transparent resin to the concave surface of the curved polarizing sheet to obtain an injection polarizing lens.

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Patent Owner(s)

  • MGC FILSHEET CO., LTD.;MITSUBISHI GAS CHEMICAL COMPANY, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akaki, Masayuki Saitama, JP 7 20
Kimura, Hideaki Saitama, JP 89 640
Sasagawa, Taisuke Saitama, JP 3 16
Takano, Toshihiko Saitama, JP 14 88
Tokumaru, Terutaka Tokyo, JP 11 59

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