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:
Jul. 17, 2012
Filed:
Feb. 05, 2009
Hisayuki Yamatsu, Tokyo, JP;
Kimihiro Saito, Saitama, JP;
Seiji Kobayashi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An initialization apparatus that has a simplified configuration and that forms an initial hologram in an information recording medium is provided. An initialization apparatus () rotates an optical disk () and emits blue light beams (Lb) and (Lb) to either side of the optical disk () while causing a red light beam (Lr) to follow a track formed in a reference layer (). Thus, the initialization apparatus () can perform an initialization process in which a linear initial hologram IH is formed in a recording layer () in a spiral pattern that corresponds to the track formed in a reference layer (). Accordingly, the initialization apparatus () can form a planar initial hologram layer (YH) with significantly reduced optical energy or thermal energy emitted to the optical disk () at one time.