Optical disk device

Details Optical disk device Optical disk device

2007-04-25

2009-12-29

Tran, Thang V (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

Reexamination Certificate

active

07639583

ABSTRACT:
An optical disk device that has a tilt correction unit for performing tilt correction to incline the optical axis of laser light based on a tilt between the recording layer of an optical disk and the optical axis of said laser light. The tilt is detected when the optical disk is activated. The optical disk device has a memory for storing a difference in temperature in accordance with the amount of the detected tilt. The difference in temperature is utilized for updating the tilt. The optical disk device engages said tilt correction unit to update said tilt, when a difference in temperature between activation of said optical disk and writing/reading information onto/from said optical disk is detected and when the detected difference in temperature has exceeded the stored difference in temperature corresponding to the amount of the detected tilt.

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