Patent ID: 7436608

Claim:
A focusing module comprising: a casing, defining an outer bore; a fixed magnetic element fixed in the casing and generating a first magnetic field; said fixed magnetic element forming a substantially circumferential shape corresponding to the outer bore of the casing; a resilient membrane received and retained in the outer bore and having a central hole therein; said central hole having a diameter less than the diameter of the outer bore; a movable magnetic element directly mounted to an underside of the membrane and surrounding the central hole in a substantially concentric manner, the movable magnetic element generating a second magnetic field, which interacts with the first magnetic field of the fixed magnetic element to induce a force acting on the membrane to cause elastic deformation of the membrane; said membrane automatically returning to an un-deformed position upon removal of either said first or second magnetic field; and a lens fixed to the central hole of the membrane whereby the lens is movable with respect to the casing due to the elastic deformation of the membrane caused by magnetic interaction between the first and second magnetic fields of the fixed and movable magnetic elements; said lens and movable magnetic element free of contact with the casing; said lens having a diameter substantially equivalent to the diameter of the central hole defined by the membrane.