An endoscope system having: a transmission cable electrically connecting an actuator that moves an optical element along an optical axis direction and a driving signal generator for generating and supplying a driving signal for driving the actuator; a detector configured to detect magnitude of the driving signal output from the driving signal generator to be supplied to the actuator through the transmission cable; and a processor configured to supply the driving signal with an initial driving voltage value to the actuator for a predetermined time, calculate a combined resistance value including a resistance value of the transmission cable and a resistance value of the actuator, based on at least the detected magnitude of the driving signal, calculate a driving voltage of the actuator, based on the calculated combined resistance value and a preset rated current value of the actuator, and cause a storage to record the calculated driving voltage.

A VCM is disclosed, the VCM including a rotor including a bobbin arranged at an upper surface of a base formed with an opening, and a driving coil wound on the bobbin, a stator including a driving magnet opposite to the driving coil, and a yoke secured by the driving magnet at an inner surface of a lateral plate, and a tilting unit including a tilt magnet arranged at an outer surface of the lateral plate, a housing fixing the tilt magnet, and a tilt coil unit opposite to the tilt magnet.

The present embodiment relates to a dual camera module comprising a first camera module and a second camera module, wherein: a first magnet unit of the first camera module includes a first magnet and a second magnet, both disposed opposite to each other on a side surface of a first housing; a second magnet unit of the second camera module includes a third to a sixth magnet arranged on four respective corners of a second housing; a third magnet unit is disposed on a side surface of the first housing facing the second housing; the third magnet unit is disposed between the first magnet and the second magnet; and the third magnet unit is smaller than the first magnet and is disposed on a virtual line connecting an optical axis of the first camera module and an optical axis of the second camera module.

The present embodiment relates to a dual camera module comprising a first camera module and a second camera module, wherein: a first magnet unit of the first camera module includes a first magnet and a second magnet, both disposed opposite to each other on a side surface of a first housing; a second magnet unit of the second camera module includes a third to a sixth magnet arranged on four respective corners of a second housing; a third magnet unit is disposed on a side surface of the first housing facing the second housing; the third magnet unit is disposed between the first magnet and the second magnet; and the third magnet unit is smaller than the first magnet and is disposed on a virtual line connecting an optical axis of the first camera module and an optical axis of the second camera module.

An optical device includes a light receiving element for detecting light reflected and transmitted from a subject; a voltage part for providing a first bias voltage or a second bias voltage to the light receiving element; and a controller for controlling the voltage part so that the second bias voltage provided from the voltage part is synchronized with a light output of a light emitting part to be provided to the light receiving element.

A lens apparatus includes a first holder holding a first lens unit and moving, manually or by an external driver, in an optical axis direction, a second holder holding a second lens unit and being electrically driven in the direction, a transmission member supported by the second holder to be movable in a first range in the direction relative to the second holder, a driving unit moving the second holder in the direction via the transmission member, a biasing member biasing the transmission member toward an end of the first range opposite to the first lens unit, and a controller controlling the driving unit. Movable ranges of the first and second holders in the direction overlap each other. The controller determines a relative position between the driving unit and the second holder in the direction, and changes a control of the driving unit based on the relative position.

A lens apparatus includes a first holder holding a first lens unit and moving, manually or by an external driver, in an optical axis direction, a second holder holding a second lens unit and being electrically driven in the direction, a transmission member supported by the second holder to be movable in a first range in the direction relative to the second holder, a driving unit moving the second holder in the direction via the transmission member, a biasing member biasing the transmission member toward an end of the first range opposite to the first lens unit, and a controller controlling the driving unit. Movable ranges of the first and second holders in the direction overlap each other. The controller determines a relative position between the driving unit and the second holder in the direction, and changes a control of the driving unit based on the relative position.

A camera module is provided, including a holder, a base, a bottom, an image sensor, and a first biasing element. The holder holds an optical lens and is disposed on the base. The bottom supports the image sensor and connects to the base via the first biasing element. The bottom and the image sensor can be moved with respect to the base by the first biasing element.

A camera module is provided, including a holder, a base, a bottom, an image sensor, and a first biasing element. The holder holds an optical lens and is disposed on the base. The bottom supports the image sensor and connects to the base via the first biasing element. The bottom and the image sensor can be moved with respect to the base by the first biasing element.

A lens driving device is provided, including: a holder member; a first driving unit disposed at the holder member; a base disposed at a lower side of the holder member and spaced apart from the holder member; a first circuit board disposed at an upper surface of the base; a second circuit board including a second driving unit facing the first driving unit, and disposed at an upper surface of the first circuit board; a support member supporting the holder member with respect to the base; and a guide portion protruded from an upper surface of the base, wherein the guide portion supports the second circuit board. In an embodiment, a coil at the second circuit board and a magnet at the holder member may be assembled at a predetermined interval, such that reliability of the product with respect to performance of handshake compensation device can be enhanced.