Patent ID: 7368846

Claim:
A microactuator comprising: a substrate; a moving element, which is supported on the substrate in a displaceable position; a driving section for outputting a drive signal that causes displacement in the moving element; a converting section, which stores a correlation between the displacement of the moving element and the drive signal; a displacement sensing section for sensing the displacement of the moving element being supplied with the drive signal; and a calibrating section for calibrating the correlation stored in the converting section with the drive signal and the output of the displacement sensing section, wherein the driving section outputs, as the drive signal, a low-frequency signal, of which the frequency is approximately equal to, or lower than, the primary resonance frequency of the moving element, and wherein the displacement sensing section superposes, on the drive signal, a high-frequency signal, of which the frequency is equal to or higher than the primary resonance frequency of the moving element.