Beam spot position control device and beam spot position control method, and optical disk recording and reproducing device

A beam spot position control method for controlling multiple beam spot positions irradiated onto an optical recording medium so as to be disposed linearly, said method comprising:

• light detecting for detecting the amount of return light for each of a plurality of beam spots disposed linearly;
• tracking control for performing tracking control based on tracking error signals of at least one of the beam spots detected with the optical detecting process;
• and
• rotation control for rotating the plurality of beam spots which are disposed linearly, based on the DC offset amount of the tracking error signals of at least two of the beam spots detected with the optical detecting process.

An optical disk recording/reproducing device for recording and reproducing information to and from an optical disk, using a plurality of beam spots disposed linearly, said optical disk recording/reproducing device comprising:

• light irradiating means for irradiating a plurality of beam spots so as to be disposed linearly as to an optical disk;
• light detecting means for detecting the amount of returning light of each of the plurality of beam spots which are disposed linearly;
• tracking control means for performing tracking control, based on the tracking error signals of at least one beam spot detected with the light detecting means;
• and
• rotation control means for controlling the plurality of beam spots which are disposed linearly, based on the DC offset amount of the tracking error signals of at least two of the beam spots detected with the light detecting means.

An optical disk recording/reproducing device for recording and reproducing information as to an optical disk, using a plurality of beam spots disposed linearly, said an optical disk recording/reproducing device comprising:

• an optical system for generating a plurality of beam spots, and irradiating the plurality of beam spots so as to be disposed linearly as to an optical disk;
• a photodetector for detecting the amount of returning light of each of the plurality of beam spots which are disposed linearly;
• a tracking control mechanism for performing tracking control, based on the tracking error signals of at least one beam spot detected with the photodetector;
• and
• a rotation control mechanism for controlling the plurality of beam spots which are disposed linearly, based on the DC offset amount of the tracking error signals of at least two of the beam spots detected with the photodetector.

A beam spot position control device for controlling multiple beam spot positions irradiated onto an optical recording medium so as to be disposed linearly, said beam spot position control device comprising:

• a light detecting unit for detecting the amount of return light for each of a plurality of beam spots disposed linearly;
• a tracking control unit for performing tracking control based on tracking error signals of at least one of the beam spots detected with the optical detecting unit;
• and
• a rotation control unit for rotating the plurality of beam spots which are disposed linearly, based on the DC offset amount of the tracking error signals of at least two of the beam spots detected with the optical detecting unit.

An optical disk recording/reproducing device for recording and reproducing information as to an optical disk, using a plurality of beam spots disposed linearly, said optical disk recording/reproducing device comprising:

• a light irradiating unit for irradiating a plurality of beam spots so as to be disposed linearly as to an optical disk;
• a light detecting unit for detecting the amount of returning light of each of the plurality of beam spots which are disposed linearly;
• a tracking control unit for performing tracking control, based on the tracking error signals of at least one beam spot detected with the light detecting unit;
• and
• a rotation control unit for controlling the plurality of beam spots which are disposed linearly, based on the DC offset amount of the tracking error signals of at least two of the beam spots detected with the light detecting unit.