Optical disk device and method capable of adjusting a tilt of an object lens
OwnerNaotoshi Iwazawa, Yasushi Todainventors
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Abstract
A tile actuator of an object lens in an optical disk device is controlled by a tilt controller that includes a filter for stopping a signal with first resonance frequency of the tilt actuator, a filter for amplifying a signal with a frequency less than the rotational frequency of the disk, and a filter for restricting current for driving the tilt actuator.
Claims9
A device for outputting a driving current to an actuator for adjusting amount of tilt between a surface of a medium of an optical disk device and an object lens of the optical disk device, comprising a filter for stopping signals in a band including the first resonance frequency of the actuator.
A device for outputting a driving current to an actuator for adjusting amount of tilt between a surface of a medium of an optical disk device and an object lens of the optical disk device, comprising a filter for amplifying signals in a band less than a rotational frequency of the disk.
A device for outputting a driving current to an actuator for adjusting amount of tilt between a surface of a medium of an optical disk device and an object lens of the optical disk device, comprising:
- a first filter for stopping signals in a band including the first resonance frequency of the actuator;
- and
- a second filter for amplifying signals in a band less than a rotational frequency of the disk.
Dependencies are inferred from the claim text.