Patent ID: 7420449
Filing Date: 2008-09-02
Classification: H01F

Abstract:
1. An electromagnetic actuator for alternating a mirror between two angular positions, comprising: a static component for providing a magnetic field, the static component comprising a first magnetic pole and a second magnetic pole, the first magnetic pole comprising a first opening and a second opening, the second magnetic pole comprising a first arm and a second arm, wherein the first arm extends into the first opening leaving a first air gap between the first arm and the first opening, wherein the second arm extends into the second opening leaving a second air gap between the second arm and the second opening, and wherein a magnetic flux bridges the first air gap and the second air gap; a mirror holder comprising a moving portion that is pivotable about an axis, the mirror being fixed to a moving portion arm of the moving portion; and first and second voice coils arranged at opposite sides of the mirror holder, wherein the static component and the mirror holder are arranged so that the first voice coil at least partially extends into the first air gap and the and second voice coil at least partially extends into the second air gap.