20110279899 | CORRECTION-LENS-MOVING VOICE COIL MOTOR, ANTI-VIBRATION DEVICE, INTERCHANGEABLE LENS UNIT AND OPTICAL APPARATUS - A voice coil motor for moving a correction lens comprising a magnet unit comprising a pair of yokes and at least one permanent magnet for defining a magnetic gap, and a coil disposed in the magnetic gap, to cause the relative linear movement of the magnet unit and the coil by current supplied to the coil; the permanent magnet having different magnetic poles adjacent to each other along the movement direction on a surface opposing the magnetic gap; the width of the permanent magnet in the movement direction being two times the width Wm of the magnetic poles; the width Wa of the coil in the movement direction being smaller than the width | 11-17-2011 |