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:
Nov. 23, 2010
Filed:
Dec. 27, 2005
Yuichi Nakamura, Kawasaki, JP;
Yuichi Nakamura, Kawasaki, JP;
Toshiba Samsung Storage Technology Corporation, Kawasaki, JP;
Abstract
An optical head includes a first laser diode configured to generate a laser beam with a wave length of λ, a second laser diode configured to generate a laser beam with a shorter wave length of λthan the wave length λ, a collimator lens arranged so that the laser beams are incident on it, an aperture filter arranged on an optical axis of the collimator lens, and an object lensarranged on the optical axis so that the laser beams passing through the aperture filter are incident on it, wherein the second laser diode is arranged at a position on the optical axis further away from collimator lens than the first laser diode is away from the collimator lens.