Optical disk unit
AssigneeTEAC Corporation
InventorsMitsumasa Kubo, Tadao Yamanouchi, Yuichi Sakamoto, Yoshiyuki Ootsuka
Life of this patent
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Abstract
An optical disk unit for recording information on and reproducing information from a disk recording medium by projecting a light beam thereonto includes a signal level detection part detecting a level of a track error signal generated based on reflected light of the light beam from the disk recording medium, a scattered light detection part detecting scattering of the reflected light, and an off-track detection part which detects an off-track of the light beam using detection signals supplied from the signal level detection part and scattered light detection part.
Claims7
An optical disk unit for recording information on and reproducing information from a disk recording medium by projecting a light beam thereonto, the optical disk unit comprising:
- a tracking error signal generation circuit responsive to reflected light from the disk recording medium for generating a track error signal;
- a signal level detection part for supplying a detection signal in response to an output level of the track error signal;
- a scattered light detection part for generating a scattered light detection signal in response to scattering of the reflected light;
- and
- an off-track detection part which detects an off-track of the light beam using the detection signal supplied from said signal level detection part and the scattered light detection signal supplied from said scattered light detection part.
Dependencies are inferred from the claim text.