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:
Aug. 12, 2003
Filed:
Jun. 27, 2001
Kikue Irie, Hiroshima, JP;
Toshinori Sumi, Hiroshima, JP;
Tomonari Yoshimura, Aichi, JP;
Yoshihiro Uozu, Hiroshima, JP;
Yahei Koyamada, Ibaraki, JP;
Shiori Miyake, Ibaraki, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
A plastic optical fiber includes having a first core, a second core having a different refractive index from the first core, disposed concentrically on the outside of the first core, and a clad disposed concentrically on the outside of the second core, wherein a ratio X (r /r ) of a first core radius r to a second core radius r and a ratio Y (n /n ) of a refractive index difference n between the second core and the clad to a refactive index difference n between the first core and the clad are in a range that satisfies the expressions Y≧−1.134X+1.0518 (1), and X≦−1.4842Y +1.1097Y+0.7097 (2), and provided that Y<0.4 or X≧0.76 and that coordinate pairs X=0.8 and Y=0.35 as well as X=0.8 and Y=0.45 are excluded. The plastic optical fiber can have a high transmission power and a wide bandwidth. A cable and an optical transimission device can each include this plastic optical fiber.