Aberration correcting device, optical head, and optical disc...

Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium

Reexamination Certificate

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C369S044230

Reexamination Certificate

active

07978585

ABSTRACT:
An aberration correcting device includes: a first transparent electrode; a second transparent electrode; and a liquid crystal layer disposed between the first transparent electrode and the second transparent electrode, having refractive index varying according to an electric field applied to the liquid crystal layer, wherein the first transparent electrode has a first circular dividing line and a second circular dividing line formed outside the first circular division line arranged to be concentric with the second circular dividing line, and wherein a region between the first circular dividing line and the second circular dividing line is radially divided by plural radial dividing lines.

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Notification of Reasons for Refusal mailed by Japan Patent Office on Sep. 15, 2009 in the corresponding Japanese patent application No. 2008-198775.
Notification of Reasons for Refusal mailed by Japan Patent Office on Dec. 8, 2009 in the corresponding Japanese patent application No. 2008-198775.

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