Patent ID: 8111295
Filing Date: 2012-02-07
Classification: G02B,G03B,H04N

Abstract:
1. An image stabilizer used in an optical instrument, comprising: a base block fixed to the optical instrument; an optical element holder for holding an optical element disposed on an optical axis of the optical element; a first printed circuit board attached to the optical element holder, for having a first printed coil; a second printed circuit board disposed outside the optical element holder, for having a second printed coil; a pair of first leaf springs disposed in parallel with each other and elastically deformable in a first direction in a plane orthogonal to the optical axis, each of the first leaf springs being fixed to the optical element holder at an end and to the second printed circuit board at the other end; a pair of second leaf springs disposed in parallel with each other and elastically deformable in a second direction transverse to the first direction in the plane orthogonal to the optical axis, each of the second leaf springs being fixed to the second printed circuit board at an end and to the base block at the other end; a first stationary magnet fixed to the optical instrument, for generating a magnetic field around the first printed coil, when an electric current is fed through the first printed coil in the magnetic field of the first stationary magnet, the optical element holder being shifted while bending the first leaf springs so that the optical element is shifted to counteract a shake in the first direction; and a second stationary magnet fixed to the optical instrument, for generating a magnetic field around the second printed coil, when an electric current is fed through the second printed coil, the second printed circuit board being shifted while bending the second leaf springs so that the optical element is shifted to counteract a shake in the second direction.