Patent ID: 8139279
Filing Date: 2012-03-20
Classification: G02B

Abstract:
1. A movable body apparatus comprising: a vibratory system, the vibratory system having a resonance frequency, and including at least a movable body capable of being reciprocally, rotatably oscillated; a driving portion configured to drive the vibratory system, based on a drive signal applied to the driving portion, the drive signal having a driving frequency; a detecting portion configured to detect the resonance frequency of the vibratory system; a drive controlling portion configured to regulate the driving frequency of the drive signal applied to the driving portion, based on the resonance frequency of the vibratory system; a storing portion configured to store the resonance frequency detected by the detecting portion when the drive controlling portion stops the drive signal; and a measuring portion configured to measure an elapse time from a drive signal stopping time to a request for a drive start time, wherein the drive controlling portion sets a driving frequency at the drive start time using the elapse time and the stored resonance frequency, and wherein when the elapse time is shorter than a predetermined time, the drive controlling portion sets the driving frequency at the drive start time to the stored resonance frequency.