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Document Type and Number:
Japanese Patent JPH0251484
Kind Code:
B2
Abstract:
The invention relates to an optical fiber of the step-index type in which the core material is poly(methyl methacrylate) or a copolymer of methyl methacrylate with another methacrylate or an acrylate. A copolymer of vinylidene fluoride with hexafluoroacetone is employed as the cladding material which makes good adhesion to the polymethacrylate core. When the amount of hexafluoroacetone is 4-20 mole %, the copolymer is low in crystallinity, high in transparency, appropriately low in refrax index and higher than 100 DEG C. in softening temperature, and can be extruded under the conditions suited to extrusion of poly(methyl methacrylate).

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Inventors:
KOISHI TOSHIO
TANAKA ISAO
YASUMURA TAKASHI
NISHIKAWA YUKITOSHI
Application Number:
JP14219584A
Publication Date:
November 07, 1990
Filing Date:
July 11, 1984
Export Citation:
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Assignee:
CENTRAL GLASS CO LTD
International Classes:
G02B1/04; C08L33/04; C08L33/12; C08L73/00; G02B6/00; G02B6/02; G02B6/10; G02B



 
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