Actuators for rotating or tilting an optical element, for example an optical path folding element, comprising a voice coil motor (VCM) and a curved ball-guided mechanism operative to create a rotation or tilt movement of the optical element around a rotation axis upon actuation by the VCM. In some embodiments, an actuator includes two, first and second VCMs, and two curved ball-guided mechanisms operative to create rotation or tilt around respective first and second rotation axes.

A prism rotation adjustment mechanism, a photolithographic exposure system and a photolithography tool are disclosed. The prism rotation adjustment mechanism includes a frame (200), a flexible mechanism (100) and an actuation mechanism. The flexible mechanism (100) includes a fixing component (110), an actuating component (120), a connecting component (130) and a swinging component (140) that are flexibly articulated in a sequence. The fixing component (110) is fixed to the frame (200). The actuation mechanism is fixed to the frame (200) and coupled to the actuating component (120). On the swinging component (140) are secured a prism wherein an axis of articulation between the swinging component (140) and the fixing component (110) is in correspondence with a rotational center of the prism. The flexible mechanism of the prism rotation adjustment mechanism is a quadrilateral flexibly-articulated assembly, in which, when driven by the actuation mechanism, the actuating component can convert translational movement into rotational movement, allowing the control of the rotational movement to be more accurate and hence improving the rotational control accuracy of the prisms. Moreover, the axis of articulation between the swinging component and the fixing component provides a stable axis for the prisms to rotate thereabout, avoiding crosstalk during the rotation and hence additionally improving the prism rotation control accuracy.

A camera module includes a housing having an internal space, a reflecting module including a reflecting member on a movable holder movably supported by an inner wall of the housing in the internal space, and a lens module disposed behind the reflecting module in the internal space, and including lenses aligned in an optical axis direction so that light reflected by the reflecting member is incident thereto. The movable holder is configured to move the reflecting member in a first axis direction approximately perpendicular to the optical axis direction and a second axis direction approximately perpendicular to the optical axis direction and the first axis direction with respect to the housing. The lens module includes at least two lens barrels disposed on sidewalls of the housing, linearly movable in approximately the optical axis direction, and including the lenses divided and disposed therein.

A camera actuator includes a housing; a prism unit disposed in the housing; and a driving unit for tilting the prism unit. A ball bearing and a pulling magnet for generating attractive force to each other are disposed in the prism unit and the housing. The prism unit is supported to the housing by the attractive force between the ball bearing and the pulling magnet.

Actuators for rotating or tilting an optical element, for example an optical path folding element, comprising a voice coil motor (VCM) and a curved ball-guided mechanism operative to create a rotation or tilt movement of the optical element around a rotation axis upon actuation by the VCM. In some embodiments, an actuator includes two, first and second VCMs, and two curved ball-guided mechanisms operative to create rotation or tilt around respective first and second rotation axes.

An optical prism that includes an interlock structure that precisely couples to a complementary structure of a refractive lens. For precision, the interlock structure may be formed at the same time and using the same technique as the optical surface of the prism. The interlock structure provides high accuracy when assembling a folded lens system by precisely aligning the object side optical surface of the lens with the image side optical surface of the prism so that the optical axis is centered in the lens. The prism may have refractive power. A portion of the object side surface may be coated with an opaque material to provide an aperture stop at that surface.

A camera module includes a lens group, an image sensor, a reflective member, and a driving assembly. The lens group includes a plurality of lenses, the reflective member is configured to reflect, to the image sensor, light rays focused by at least one of the plurality of lenses, and the driving assembly is configured to drive the reflective member to move. An electronic device includes the camera module mounted on a housing.

A freeform folded optical system that include two freeform prisms with optical power. At least one of the freeform prisms is configured to fold the optical axis twice. Thus, embodiments of the freeform folded optical system fold the optical axis three or four times. Folding the optical axis three or four times in the freeform prisms allows for long focal lengths required for telephoto lens applications without requiring additional lens elements between the prisms. In addition, the configuration of the freeform folded optical system provides reduced Z-axis height when compared to conventional folded lens systems with similar optical characteristics.

An optical device detachably disposed on a scanner is provided, including a housing, a first opening, a second opening, a lens module, and a fixing member. The housing has a first surface and a second surface connected to the first surface. The first opening and the second opening are respectively formed on the first surface and the second surface. The lens module is disposed in the housing. The fixing member is detachably affixed to the scanner and pivotally connected to the housing. The light provided by the scanner enters the housing through the first opening, and the lens module guides the light to leave the housing through the second opening. The light leaving the housing through the second opening can fall on a scanned object.

A deflecting device and surveying instrument comprising a holding member having a ring shape; ring gears disposed on both sides of the holding member with the holding member interposed the ring gears, the ring gears being concentric with the holding member; bearings disposed between the holding member and the ring gears on both sides of the holding member, the bearings being concentric with the holding member; optical deflecting members disposed at central portions of the ring gears and integrated with the ring gears; deflection motors corresponding to the respective ring gears; and a drive transmitting member configured to transmit rotary force of the deflection motors to the ring gears.