Optical pickup, optical information recording method, and...

Details Optical pickup, optical information recording method, and... Optical pickup, optical information recording method, and...

2009-10-01

2011-12-13

Simpson, Lixi C (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112030, C369S053110

Reexamination Certificate

active

08077582

ABSTRACT:
The recording accuracy of information on an optical disc is increased.An information optical system (150) of an optical disc apparatus (110) enables a semiconductor laser (3) to sequentially output specific peak light (LEP) and specific slope light (LES) as an information light beam (LM) and enables the correction lens (162) 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 (101). 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 (100) can be increased.

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