Patent ID: 7486879

Claim:
An image blur correcting device comprising: an optical system that forms an image; a vibration signal output unit that outputs a vibration signal corresponding to a vibration applied to the optical system; an image displacing unit that displaces the image; and an image blur correcting unit that controls the image-displacing unit based on the vibration signal outputted from the vibration signal output unit so that the image-displacing unit displaces the image so as to cancel a blur of the image, the blur resulting from the vibration applied to the optical system, wherein the vibration signal output unit comprises: a first vibration sensor that has less drift than a second vibration sensor and detects a first vibration of a lower frequency region in an entire frequency region of the vibration applied to the optical system and outputs the vibration signal including a first vibration signal corresponding to the first vibration; the second vibration sensor that has a better frequency characteristic than the first vibration sensor and detects a second vibration of a higher frequency region in the entire frequency region of the vibration applied to the optical system and outputs the vibration signal including a second vibration signal corresponding to the second vibration; and a signal synthesizing unit that performs: obtaining the first vibration signal from the first vibration sensor; obtaining the second vibration signal from the second vibration sensor; and synthesizing the vibration signal from the first and second vibration signals, the vibration signal corresponding to the entire frequency region of the vibration applied to the optical system.