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:
Feb. 05, 2008
Filed:
Apr. 22, 2004
Keiji Kataoka, Ibaraki, JP;
Koji Doi, Ibaraki, JP;
Yasuyuki Shibayama, Ibaraki, JP;
Susumu Monma, Ibaraki, JP;
Jyun Ogino, Ibaraki, JP;
Masaru Hoshina, Ibaraki, JP;
Keiji Kataoka, Ibaraki, JP;
Koji Doi, Ibaraki, JP;
Yasuyuki Shibayama, Ibaraki, JP;
Susumu Monma, Ibaraki, JP;
Jyun Ogino, Ibaraki, JP;
Masaru Hoshina, Ibaraki, JP;
Ricoh Printing Systems, Ltd., Tokyo, JP;
Abstract
An optical fiber array is constructed by using a plurality of laser modules, which guide a laser beam emitted from a semiconductor laser of a blue color wavelength to an optical fiber, such that beam emitting ends of respective optical fibers are aligned in one row at an equal interval, and the laser beam being output from the optical fiber array is used as a multibeam of an optical recording apparatus. A relative refractive index difference of the used optical fiber is set between 0.1% to 0.2%, and a core diameter is set to 4.5 μm or less, and also a mode field diameter of the optical fiber, i.e., a diameter of a beam spot emitted from the optical fiber is set to 3 μm or more.