Patent ID: 7933057

Claim:
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 1 while a resonance frequency of the second natural oscillation mode is f 2 and N is an integer not less than 2, a relation 0.98 N≦f 2 / f 1 ≦1.02 N (where a case f 2 /f 1 =N is excluded) is satisfied; said control device is arranged to determine set driving frequencies Df 1 and Df 2 in accordance with relations Df 1 =(α 1 ×N×f 1 +α 2 ×f 2 )/ N Df 2 =(α 1 ×N×f 1 +α 2 ×f 2 ) α 1 +α 2 =1 α 1 >0 α 2 >0 and so as to satisfy a relation Df 2 =N×Df 1 ; and said oscillation system is driven by said driving member in accordance with the set driving frequencies Df 1 and Df 2 .