Optical pickup, optical information recording method, and optical disc apparatus

The recording accuracy of information on an optical disc is increased.An information optical system of an optical disc apparatus enables a semiconductor laser to sequentially output specific peak light (LEP) and specific slope light (LES) as an information light beam (LM) and enables the correction...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Saito, Kimihiro, Ogi, Shiori, Fujita, Goro
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The recording accuracy of information on an optical disc is increased.An information optical system of an optical disc apparatus enables a semiconductor laser to sequentially output specific peak light (LEP) and specific slope light (LES) as an information light beam (LM) and enables the correction lens to change the divergence angle of the specific peak light (LEP) so that an absorption change area (RA) by the specific peak light (LEP) can be positioned at a far position in the recording layer. Thus, it is possible to form an energy concentration area (RE) by the specific slope light (LES) in the vicinity of a target position (QG), and the recording accuracy of information on the optical disc can be increased.