Lens driving device for optical read and/or write system and optical read/write system
OwnerHendrik Goossens, Maria Bernardina Cloostermaninventors
Life of this patent
Estimating the term…
Abstract
A lens driving device (1) or an optical read and/or write system comprises a mechanical structure (3) with an objective lens (2) and an actuator (4, 4′, 6) for controlling the lens position. The lens driving device comprises a further actuator (5, 5a, 5b, 5′) on or near the mechanical structure so as to at least partially compensate motion generated by the first-mentioned actuator (4,6).
Claims8
A lens driving device for an optical read and/or write system, comprising a mechanical structure having an objective lens, and an actuator for controlling the lens position by acting on the mechanical structure, characterized in that the lens driving device comprises a further actuator on or near the mechanical structure for acting on the mechanical structure so as to generate at a frequency range a motion of or in the mechanical structure, to at least partially compensate motion generated by the first-mentioned actuator.
An optical read and/or write system comprising a lens driving device comprising a mechanical structure having an objective lens, and an actuator for controlling the lens position by acting on the mechanical structure, the system further comprising a controller means for generating a control signal for the actuator, the actuator acting in response to the control signal, characterized in that the lens driving device comprises a further actuator on or near the mechanical structure for acting on the mechanical structure so as to generate at a frequency range a motion of or in the mechanical structure, to at least partially compensate motion generated by the first-mentioned actuator, the controller means comprising means for generating a compensation signal for said further actuator.
An optical read and/or write system as claimed in claimed 5, characterized in that the actuator comprises a piezo-electric element.
An optical read and/or write system as claimed in claimed 5, characterized in that that the further actuator comprises a piezo-electric element.
Dependencies are inferred from the claim text.