An aperture module includes a rotating plate, seated on a base having a center opening, configured to rotate about an optical axis; an aperture driver including a moving member coupled to the rotating plate, wherein the moving member is configured to linearly reciprocate; and a plurality of blades stacked as at least two stages on the rotating plate, disposed non-overlapping to each other on the respective stages, and configured to form a variable light incident hole interlocked with rotation of the rotating plate. A cusp of adjacent ones of the blades has an extending corner portion generated when straight lateral sides of the adjacent ones of the blades meet each other.

An aperture module includes a rotating plate, seated on a base having a center opening, configured to rotate about an optical axis; an aperture driver including a moving member coupled to the rotating plate, wherein the moving member is configured to linearly reciprocate; and a plurality of blades stacked as at least two stages on the rotating plate, disposed non-overlapping to each other on the respective stages, and configured to form a variable light incident hole interlocked with rotation of the rotating plate. A cusp of adjacent ones of the blades has an extending corner portion generated when straight lateral sides of the adjacent ones of the blades meet each other.

A film is formed on a sliding surface of a component. The film contains fluororesin. The film includes a surface structure in which convex portions are joined with each other like a mesh. Each of the convex portions is formed by particles of fluororesin having aggregated.

A film is formed on a sliding surface of a component. The film contains fluororesin. The film includes a surface structure in which convex portions are joined with each other like a mesh. Each of the convex portions is formed by particles of fluororesin having aggregated.

An optical system is provided, including a movable part, a fixed part, and a driving assembly. The movable part is connected to a first optical element. The movable part is movable relative to the fixed part. The fixed part has a fixed part opening, wherein a light passes through the fixed part opening. The driving assembly drives the movable part to move relative to the fixed part. The first optical element at least partially overlaps the fixed part opening when the movable part is in a first position. When the movable part is in an extreme position, the first optical element does not overlap the fixed part opening.

An optical system is provided, including a movable part, a fixed part, and a driving assembly. The movable part is connected to a first optical element. The movable part is movable relative to the fixed part. The fixed part has a fixed part opening, wherein a light passes through the fixed part opening. The driving assembly drives the movable part to move relative to the fixed part. The first optical element at least partially overlaps the fixed part opening when the movable part is in a first position. When the movable part is in an extreme position, the first optical element does not overlap the fixed part opening.

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 imaging apparatus includes an image sensor, a mechanical shutter configured to travel in a first direction and a second direction different from the first direction relative to an imaging plane of the image sensor, and a control unit configured to control imaging about an operation of the mechanical shutter. The control unit provides first imaging that causes the mechanical shutter to travel in the first direction in synchronization with an exposure of the image sensor and second imaging that causes the mechanical shutter to travel in the second direction in synchronization with the exposure of the image sensor. The control unit determines whether to perform one of the first imaging and the second imaging or to perform both the first imaging and the second imaging continuously based on an imaging mode and predetermined information on an imaging scene.

An imaging apparatus includes an image sensor, a mechanical shutter configured to travel in a first direction and a second direction different from the first direction relative to an imaging plane of the image sensor, and a control unit configured to control imaging about an operation of the mechanical shutter. The control unit provides first imaging that causes the mechanical shutter to travel in the first direction in synchronization with an exposure of the image sensor and second imaging that causes the mechanical shutter to travel in the second direction in synchronization with the exposure of the image sensor. The control unit determines whether to perform one of the first imaging and the second imaging or to perform both the first imaging and the second imaging continuously based on an imaging mode and predetermined information on an imaging scene.

A shutter apparatus includes a blade unit configured to open and close an opening used for exposure, a blade moving member configured to move the blade unit between an open position and a closed position of the opening, an urging member configured to urge at least one of the blade unit and the blade moving member in a direction from the closed position to the open position of the opening; and a blade cam member configured to contact the blade moving member as the blade unit moves from the closed position to the open position of the opening.