An optical system is provided, including a fixed part, a movable part, and a driving assembly. The fixed part has an opening. A light passes through the opening. The movable part is movable relative to the fixed part and connected to a first optical element. The driving assembly drives the movable part to move relative to the fixed part. The first optical element at least partially overlaps the opening when the movable part is in a first position. The first optical element further includes a first optical element surface, and the first optical element surface faces the light.

An optical element driving mechanism is provided, which includes a movable portion, a fixed portion and a driving assembly. The movable portion is connected with an optical element. The movable portion is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move relative to the fixed portion.

An optical element driving mechanism is provided, which includes a movable portion, a fixed portion and a driving assembly. The movable portion is connected with an optical element. The movable portion is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move relative to the fixed portion.

An iris module includes a base, a plurality of blades disposed on the base, and an iris driving unit including a magnet unit configured to linearly reciprocate on the base and drive the plurality of blades. The magnet unit includes a driving magnet with an odd number of polarized poles along a movement path of the magnet unit.

An iris module includes a base, a plurality of blades disposed on the base, and an iris driving unit including a magnet unit configured to linearly reciprocate on the base and drive the plurality of blades. The magnet unit includes a driving magnet with an odd number of polarized poles along a movement path of the magnet unit.

An aperture module includes a base; a rotor rotatably disposed with respect to the base; a plurality of blades interlockable with the rotor rotating to form incidence holes of various sizes; a rolling portion, including a plurality of rolling balls, disposed between the base and the rotor; and an aperture driver including a magnet portion disposed on one of the base or the rotor, and a coil portion disposed to face the magnet portion. The magnet portion includes a first aperture magnet and a second aperture magnet spaced apart from each other. Attractive force acts on either one of the first aperture magnet or the second aperture magnet in at least two directions intersecting each other.

An aperture module includes a base; a rotor rotatably disposed with respect to the base; a plurality of blades interlockable with the rotor rotating to form incidence holes of various sizes; a rolling portion, including a plurality of rolling balls, disposed between the base and the rotor; and an aperture driver including a magnet portion disposed on one of the base or the rotor, and a coil portion disposed to face the magnet portion. The magnet portion includes a first aperture magnet and a second aperture magnet spaced apart from each other. Attractive force acts on either one of the first aperture magnet or the second aperture magnet in at least two directions intersecting each other.

A blade driving device includes an opening forming member forming an opening portion, a pivotal member pivoting about the opening portion, blades configured to enter or exit from the opening portion upon receiving power transmitted from the pivotal member, a cover member arranged so that the pivotal member and the plurality of blades are located between the cover and the opening forming member, and engaging portions engaging the of blades with the opening forming member. The pivotal member comes into slidable contact with the engaging portions in a process of pivoting. A pivotal position of the pivotal member with respect to the opening forming member is defined by the engaging portions.

A blade driving device includes an opening forming member forming an opening portion, a pivotal member pivoting about the opening portion, blades configured to enter or exit from the opening portion upon receiving power transmitted from the pivotal member, a cover member arranged so that the pivotal member and the plurality of blades are located between the cover and the opening forming member, and engaging portions engaging the of blades with the opening forming member. The pivotal member comes into slidable contact with the engaging portions in a process of pivoting. A pivotal position of the pivotal member with respect to the opening forming member is defined by the engaging portions.

A blade driving device includes an opening forming member forming an opening portion, a pivotal member pivoting about the opening portion, blades configured to enter or exit from the opening portion upon receiving power transmitted from the pivotal member, a cover member arranged so that the pivotal member and the plurality of blades are located between the cover and the opening forming member, and engaging portions engaging the of blades with the opening forming member. The pivotal member comes into slidable contact with the engaging portions in a process of pivoting. A pivotal position of the pivotal member with respect to the opening forming member is defined by the engaging portions.