Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-08-02
2011-08-02
Ortiz Criado, Jorge L (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112120, C369S044230, C369S112030, C369S044420
Reexamination Certificate
active
07990835
ABSTRACT:
An optical pickup apparatus is provided with an angle adjusting element. The angle adjusting element changes a propagation direction of luminous fluxes of four luminous flux regions set about an optical axis of the laser light, out of laser light reflected by a disc, and mutually disperses the luminous fluxes. A signal light region in which signal light only is present appears on a detecting surface of a photodetector. A sensor pattern for signal light is placed at a position irradiated with the signal light within this region. A sensor pattern for a spherical aberration detection is placed on an inner side of this region.
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Hibino Katsutoshi
Nagatomi Kenji
Takahashi Seiichiro
Criado Jorge L Ortiz
Ditthavong Mori & Steiner, P.C.
Sanyo Electric Co,. Ltd.
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