Method and apparatus for long seeking control of pickup head

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

Reexamination Certificate

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Details

C369S030170, C369S053100, C369S124010

Reexamination Certificate

active

07106670

ABSTRACT:
A method for long seeking control of an optical read/write head is disclosed. The optical read/write head includes a sled moved by a sled motor, and a lens mounted on the sled and moved by a lens actuator, and said method includes steps of determining a velocity profile according to a desired travel distance of the optical read/write head; detecting an instant velocity and an instantaneous position of the optical read/write head at a certain time spot; comparing the instant velocity with a target velocity corresponding to the instantaneous position according to the velocity profile; modifying velocities of the sled and the lens according to the comparing result; and dynamically adjusting a position of the lens in the sled. An apparatus for long seeking control of an optical read/write head is also disclosed.

REFERENCES:
patent: 6781929 (2004-08-01), Kadlec

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