Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-11-17
2011-10-11
Nguyen, Hoa T (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112020, C369S044230, C369S094000
Reexamination Certificate
active
08036089
ABSTRACT:
An optical pick-up to perform recording or reproducing for an optical recording medium is disclosed, which includes a light source configured to emit a light beam, an objective lens configured to focus the light beam onto the optical recording medium, and an aberration generation device provided between the light source and the objective lens, configured to generate coma aberration for the beam focused by the objective lens, based on a detected value from a device configured to detect a degree of tilt of the optical recording medium, wherein the tilt is compensated for by the coma aberration generated by the aberration generation device.
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Chu Kim-Kwok
Dickstein & Shapiro LLP
Nguyen Hoa T
Ricoh & Company, Ltd.
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