SIL near-field flying head structure to control gap between...

Details SIL near-field flying head structure to control gap between... SIL near-field flying head structure to control gap between...

2006-02-21

2006-02-21

Patel, Gautam R. (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S112230

Reexamination Certificate

active

07002886

ABSTRACT:
The present invention is to disclose a SIL near-field flying head flying state control structure in which the SIL is installed in a lens holder that can be biased. The lens holder includes three detection points spaced around the SIL for detecting the distance between each detection point and an optical disk, and a number of single-axis displacement devices for controlling the corresponding lateral side of the lens holder to move axially relative to the optical disk. A server can control the single-axis displacement devices to adjust the posture of the lens holder subject to the distance between each detection point and the optical disk measured, keeping the parallelism between the SIL and the optical disk within a predetermined level.

REFERENCES:
patent: 5812721 (1998-09-01), Ingvarsson et al.

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