Optical system

An optical element driving mechanism, driving an optical element having an optical axis, comprising:

• a fixed portion;
• a frame, rotated around a first axis and a second axis relative to the fixed portion, wherein the first axis and the second axis are perpendicular to the optical axis;
• a holder, disposed in the frame and moved with the frame, wherein the holder moved along a direction that is parallel to the optical axis relative to the frame;
• a driving assembly, comprising a driving coil and a magnetic assembly, wherein the driving coil is disposed around the holder, and at least a part of the magnetic assembly is disposed on the frame, and at least another part of the magnetic assembly is disposed on the fixed portion;
• and
• an elastic element, comprising an outer ring portion, a middle ring portion, an inner ring portion and a plurality of connecting portions, the outer ring portion is fixedly connected to the fixed portion, the outer ring portion is directly connected to and completely corresponded to the fixed portion, the middle ring portion is fixedly connected to the frame, the middle ring portion is directly connected to and completely corresponded to the frame, and the inner ring portion is fixedly connected to the holder, the inner ring portion is directly connected to and completely corresponded to the holder, wherein the outer ring portion, the middle ring portion and the inner ring portion respectively have a closed ring shape, the outer ring portion, the middle ring portion and the inner ring portion are in a same plane when view in a direction that is perpendicular to the optical axis, the outer ring portion, the middle ring portion and the inner ring portion are connected by the plurality of connecting portions, and the elastic element is integrally formed in one piece.