| 摘要 |
An actuator using an electromechanical transducer capable of driving efficiently and at high speed and a drive pulse generating apparatus, in which the frequency f of a drive pulse is set in a range satisfying equation (1) and the wavelength T is set in a range satisfying equations (2), (3) and (4);where fr: resonance frequency of an oscillating member including the electromechanical transducer, T1: drive pulse width, T2: width of a gradually changing portion of drive pulse voltage, T3: width of a rapidly changing portion of drive pulse voltage and where 0.1<(T3/T2)<0.3 may be satisfied.
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