| 摘要 |
The optical disc apparatus comprises a disc motor ( 114 ) operable to rotate an optical disc ( 1 ), a traverse ( 111 ) operable to move an optical beam spot which is irradiated on an optical beam on the optical disc ( 1 ) to the radius direction of the optical disc ( 1 ), a linear velocity operation unit ( 117 ) operable to detect the linear velocity of the optical beam spot, a disc motor control unit ( 116 ) operable to control the disc motor ( 114 ) so that the linear velocity detected by the linear velocity operation unit ( 117 ) remains roughly invariable in an arbitrary radius location on the optical disc ( 1 ) when information recorded on the optical disc ( 1 ) is read out, a search control unit ( 121 ) and a location profile adjustment unit ( 118 ) operable to control a traverse ( 111 ) so as to prevent the linear velocity from decreasing to the permissible linear velocity or below when the optical beam spot is moved by the traverse ( 111 ).
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