发明授权
US5206762A Viscoelastic substance and objective lens driving apparatus with the same 失效
VISTICELASTIC物理和目标镜头驱动装置

Viscoelastic substance and objective lens driving apparatus with the same
摘要:
An objective lens driving apparatus includes an objective lens held by a movable member. The movable member is supported on a base by a support mechanism to be movable in a predetermined direction. Magnetic field forming unit is fixed to the base so as to apply a magnetic field to the movable member. Focusing coils and tracking coils are fixed to the movable member to drive the movable member in the predetermined direction in cooperation with the magnetic field. Viscoelastic substances for absorbing vibration of the movable member are arranged between the focusing coils and the magnetic unit and between the tracking coils and the unit. The viscoelastic substance has a viscoelastic material and magnetic material dispersed therein.
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