An optical system is provided. The optical system includes a first optical module, a second optical module and a third optical module. The first optical module is configured to connect at least one first optical member. The second optical module is configured to connect at least one second optical member. The third optical module is configured to connect a third optical member, wherein the third optical module is located between the first optical module and the second optical module.

A follow focus apparatus for adjusting the focus of a camera lens includes a gear ring and a sizing ring. The gear ring includes an outer surface, an inner surface, and at least one through-hole extending radially therethrough. The outer surface has a plurality of teeth extending radially outwardly therefrom, and the inner surface has a cavity defined therein. The sizing ring is releasably coupled to the gear ring and includes an outer ring body coaxially coupled to an inner ring body.

An imaging system having a forward and rearward orientation and comprising: (a) one or more parabolic reflectors having a base, a focus, and a reflector axis, said one or more parabolic reflectors defining a central reflector axis; (b) at least one a light source disposed near or essentially at said focus of each of said one or more parabolic reflectors forward of its base; and (c) an imaging device disposed within said one or more parabolic reflectors, and comprising a zooming lens having an optical axis essentially coincident with said central reflector axis.

An imaging system having a forward and rearward orientation and comprising: (a) one or more parabolic reflectors having a base, a focus, and a reflector axis, said one or more parabolic reflectors defining a central reflector axis; (b) at least one a light source disposed near or essentially at said focus of each of said one or more parabolic reflectors forward of its base; and (c) an imaging device disposed within said one or more parabolic reflectors, and comprising a zooming lens having an optical axis essentially coincident with said central reflector axis.

An optical element driving mechanism includes a movable portion, a fixed portion and a driving assembly. The movable portion is configured to connect an optical element having an optical axis. The fixed portion includes a base with a plate structure, wherein 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 base. A thickness direction of the base is perpendicular to the optical axis, the base has a recessed structure, and when viewed from the thickness direction of the base, the recessed structure is overlapped with the optical axis.

Provided is a camera module, including: a lens group including a lens barrel and a camera lens; and a driver assembly configured to drive the camera lens to move and including a magnetic portion. The camera lens includes a magnetic matching portion. The magnetic portion and the magnetic matching portion are respectively located at two ends of a side wall of the lens barrel in a thickness direction, and are connectable to each other through magnetic attraction, in such a manner that the camera lens is driven by the driver assembly to move along the optical axis of the camera lens. In this way, the side wall of the lens barrel is free of a through hole, so that light is prevented from entering the lens barrel via the through hole, thereby prolonging the lifetime of the camera module and improving the image-capturing effect.

Provided is a camera module, including: a lens group including a lens barrel and a camera lens; and a driver assembly configured to drive the camera lens to move and including a magnetic portion. The camera lens includes a magnetic matching portion. The magnetic portion and the magnetic matching portion are respectively located at two ends of a side wall of the lens barrel in a thickness direction, and are connectable to each other through magnetic attraction, in such a manner that the camera lens is driven by the driver assembly to move along the optical axis of the camera lens. In this way, the side wall of the lens barrel is free of a through hole, so that light is prevented from entering the lens barrel via the through hole, thereby prolonging the lifetime of the camera module and improving the image-capturing effect.

An embodiment relates to a camera actuator and a camera module comprising same. A camera actuator according to an embodiment may comprise: a housing; a base which is coupled to the housing and on which a lens assembly is disposed; a shaper unit disposed in the housing; a first driving part coupled to the shaper unit; and a prism unit coupled to the housing. The housing may comprise a housing body having an opening formed therethrough and a housing side part extending from the housing body. The first driving part may be disposed to overlap with the prism unit in the direction vertical to an optical axis.

An image pickup apparatus includes: a first memory configured to store, as a reference value, angular velocities when the image pickup apparatus is in a rest state relative to ground; a second memory configured to store spin-induced angular velocities; a subtraction circuit configured to subtract the reference value from each of the angular velocities detected for each rotational direction by the angular velocity sensor; a circuit configured to calculate an image stabilization amount for counteracting blur of the object image based on a result of the subtraction or the spin-induced angular velocities stored in the second memory in accordance with an operation mode of the image pickup apparatus; and a drive control circuit configured to drive an image pickup device and a part of the optical system, based on the image stabilization amount.

A lens barrel includes: a tubular cam follower; a cam barrel having a cam groove that is engaged with the cam follower; and a lens support member that supports a lens, the lens support member has a protruding portion that protrudes outward in a radial direction of the lens from an outer peripheral portion of the lens support member and that is inserted into the cam follower, and the cam follower and the lens support member are stuck to each other in a non-fastened state.