OPTICAL DISK APPARATUS
First Claim
1. An optical disk apparatus comprising an optical pickup and a signal processor,whereinthe optical pickup comprises:
- an actuator for driving an object lens; and
a sensed signal output part for outputting a sensed signal to the signal processor,the signal processor comprises;
a servo signal generator for generating a tracking error signal and a lens error signal by conducting addition/subtraction of the sensed signal supplied from the sensed signal output part; and
a tracking offset correction quantity signal generator which is input with the lens error signal to output a tracking offset correction quantity signal,wherein DC (direct current) offset correction is conducted by conducting addition/subtraction between the tracking error signal and both the lens error signal and the tracking offset correction quantity signal.
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Accused Products
Abstract
In an optical disk apparatus, an optical pickup includes an actuator for driving an object lens, and a sensed signal output part for making it possible to generate a tracking error signal and a lens error signal by addition/subtraction, and a signal processor includes a servo signal generator for generating a tracking error signal and a lens error signal on the basis of a signal supplied from the sensed signal output part, and a tracking offset correction quantity signal generator supplied with the lens error signal to output a tracking offset correction quantity signal. DC (direct current) offset correction is conducted by conducting addition/subtraction between the tracking error signal and both the lens error signal and the tracking offset correction quantity signal.
37 Citations
10 Claims
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1. An optical disk apparatus comprising an optical pickup and a signal processor,
wherein the optical pickup comprises: -
an actuator for driving an object lens; and a sensed signal output part for outputting a sensed signal to the signal processor, the signal processor comprises; a servo signal generator for generating a tracking error signal and a lens error signal by conducting addition/subtraction of the sensed signal supplied from the sensed signal output part; and a tracking offset correction quantity signal generator which is input with the lens error signal to output a tracking offset correction quantity signal, wherein DC (direct current) offset correction is conducted by conducting addition/subtraction between the tracking error signal and both the lens error signal and the tracking offset correction quantity signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification