Patent ID: 7933057
Filing Date: 2011-04-26
Classification: G02B

Abstract:
1. An oscillator device including an oscillation system, a driving member configured to drive said oscillation system, and a control device configured to determine a driving force to be applied from said driving member to said oscillation system, characterized in that: said oscillation system includes a first oscillation movable element, a second oscillation movable element and a support member; said first oscillation movable element is supported by a first elastic supporting element, for torsional oscillation relative to said second oscillation movable element and around an oscillation axis; said second oscillation movable element is supported by a second elastic supporting element, for torsional oscillation relative to said support member and around the oscillation axis; said oscillation system has first and second natural oscillation modes of different frequencies around the oscillation axis, wherein, when a resonance frequency of the first natural oscillation mode is f is satisfied; said control device is arranged to determine set driving frequencies Df and so as to satisfy a relation said oscillation system is driven by said driving member in accordance with the set driving frequencies Df