Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-03-08
2011-03-08
Young, Wayne R (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S044320, C369S112290
Reexamination Certificate
active
07903531
ABSTRACT:
The invention provides an optical disk apparatus and an optical disk that are applicable to a multilayer optical disk, and enable tilt detection with a high precision. The optical disk has a transparent planar disk base member, a recording layer formed on the disk base member, and a reflecting layer in a certain positional relation to the recording layer. The optical disk apparatus includes a laser pointer61for irradiating a laser beam onto the recording layer of the optical disk by way of the disk base member to form a focusing spot on the recording layer, a photo-sensor array6G for receiving a reflected beam from the reflecting layer, and an aberration mode detecting circuit6H for detecting tilt of the optical disk by using an output from the photo-sensor array6G.
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Kobayashi Yoshiharu
Mushika Yoshihiro
Bibbins Latanya
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
Young Wayne R
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