Patent ID: 7365922
Filing Date: 2008-04-29
Classification: G02B,H02K

Abstract:
1. An optical device, comprising: a lens housing; a lens module movably disposed in the lens housing; a drive mechanism connected to the lens module, driving the lens module along an optical axis of the lens module, wherein the drive mechanism comprises a first magnetic member and a first coil, the first magnetic member comprises a first surface and a second surface opposite thereto, the first coil is disposed between the lens module and the first surface of the first magnetic member, the first magnetic member provides a first magnetic field passing through the first coil, and the lens module and first coil are driven to move along the optical axis by a force parallel to the optical axis and generated by magnetic interaction of the first coil and first magnetic field when an electric current is applied to the first coil; and a brake mechanism disposed between the lens housing and the lens module and moving perpendicular to the optical axis, thereby fixing and releasing the lens module, wherein, when the brake mechanism releases the lens module, the lens module moves along the optical axis.