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:
Jan. 12, 2010
Filed:
Jan. 18, 2007
Masataka Sato, Fujinomiya, JP;
Masataka Sato, Fujinomiya, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A POF () comprises a core () having a radius of R, an outer shell () and an outermost shell (). The core () includes concentric layers. A first layer () is at the periphery side and an nth layer () is at the center of the core (). The refractive index increases from the first layer () to the nth layer (). The refractive index N(r) at a position where a distance r apart in a radius direction from the center of the core () having a radius of Ris satisfied following equations (1) and (2) when the center of a cross-sectional circle of the core () has the refractive index of N, the outermost part of the core () has the refractive index of N, and a refractive index distribution coefficient is shown as g:()=1[1−2Δ(1)]  [Equation (1)]Δ=(12)/(21).  [Equation (2)]