Patent ID: 7920313

Claim:
An oscillator device, comprising: an oscillation system including a first oscillator, a second oscillator, a first resilient supporting member configured to support said first oscillator for torsional oscillation about a torsion axis relative to said second oscillator, and a second resilient supporting member configured to support said second oscillator for torsional oscillation about a torsion axis relative to a fixed member; driving means configured to drive said oscillation system; and drive control means configured to supply a driving signal to said driving means; wherein said oscillation system has at least two frequencies of natural oscillation mode around the torsion axis which include a first resonance frequency f 1 and a second resonance frequency f 2 , wherein there is a relationship that f 2 is approximately two-fold of f 1 , and wherein said drive control means supplies, to said driving means, a driving signal which is comprised of a driving signal based on synthesizing a first driving signal having a first driving frequency and a second driving signal having a second driving frequency, and which is such driving signal that, among the first and second driving frequencies, a lower-frequency side driving frequency Df 1 and a higher-frequency side driving frequency Df 2 satisfy a relationship Df 1×2 =Df 2 and that Df 2 satisfies a relationship f 2 −|Δf/ 2 |<Df 2 <f 2 +|Δf/ 2|.