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).