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:
Apr. 05, 2016
Filed:
Mar. 03, 2015
Asahi Glass Company, Limited, Tokyo, JP;
Toshiyuki Tanaka, Tokyo, JP;
Nobuyuki Kasahara, Tokyo, JP;
Masakuni Sato, Tokyo, JP;
Hiroshi Yamamoto, Tokyo, JP;
Susumu Saito, Tokyo, JP;
Tetsuji Shimohira, Tokyo, JP;
Yoshinobu Takano, Tokyo, JP;
Naoto Ota, Tokyo, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
To provide a plastic optical fiber using amorphous fluorinated polymers whereby transmission loss and bending loss are low, no cracking takes place during stretching, and a wide range of molding conditions is acceptable. A plastic optical fiber comprising an inner layer, an outer layer having a refractive index lower than the refractive index of the inner layer, and a protective coating layer covering the outer periphery of the outer layer, wherein the inner layer contains an amorphous fluorinated polymer (a) having no C—H bond, the outer layer contains an amorphous fluorinated polymer (c) which may have a C—H bond only at a terminal of the main chain, the glass transition temperature (Tgc) of the fluorinated polymer (c) is at least the glass transition temperature (Tga) of the fluorinated polymer (a), the plastic optical fiber is a stretched one, the fracture elongation of the fluorinated polymer (a) and the fracture elongation of the fluorinated polymer (c) are at least 120% and larger than the stretching ratio.