| 摘要 |
<p>The invention relates to an actuator for a pick-up in an apparatus for the optical recording or reproduction of information with a high dynamic range in conjunction with a low power consumption, which, moreover, can be realized with a small structural height. It is an object of the invention to eliminate the disadvantages of asymmetrical actuators and to provide an actuator having comparatively higher sensitivity and a better dynamic behaviour, which can be embodied with a small structural height. The invention is based on the principle that an asymmetrical actuator is provided which has two magnetic chambers which are arranged one behind the other and in which, with a current flowing in coils, forces are generated outside the centre of gravity of the actuator, but their undesirable torques compensate one another. The invention can preferably be applied to asymmetrical actuators for optical scanning devices in CD and DVD and also computer apparatuses.</p> |
