Disc drive apparatus

摘要

An optical disc drive apparatus ( 1 ) comprises: rotating means ( 4 ) for rotating an optical disc ( 2 ); a sledge ( 10 ) radially displaceable with respect to an apparatus frame ( 3 ); a platform ( 20 ) radially displaceable with respect to said sledge ( 10 ); an optical system ( 30 ) for scanning a disc, the optical system ( 30 ) defining an optical path ( 80 ) which is substantially fixed with respect to the sledge ( 10 ) and comprising an optical element ( 34 ) which is fixed with respect to the platform ( 20 ); an optical detector ( 35 ) fixed to said sledge ( 10 ); vibration detection means for detecting vibrations caused by the rotating disc; said vibration detection means comprising radial displacement detection means for detecting a radial displacement of said platform ( 20 ) with respect to said sledge ( 10 ).