Various embodiments include perimeter sheet spring suspension arrangements for cameras. A perimeter sheet spring suspension arrangement may be used to suspend a moveable platform of the camera from a base structure of the camera, and allow a lens group of the camera to move laterally. According to some embodiments, the perimeter sheet spring suspension arrangement may include one or more tabs that may be used as bumpers that cushion lateral movement of the moveable platform.

One embodiment of a lens driving apparatus may comprise: a bobbin having a first coil disposed on the outer circumferential surface thereof; a position detection sensor which is disposed on the outer circumferential surface of the bobbin and which moves together with the bobbin; a first magnet disposed opposite to the first coil; a housing for supporting the first magnet; upper and lower elastic members which are coupled to the bobbin and the housing; and a plurality of wirings which are disposed on the outer circumferential surface of the bobbin so as to electrically connect at least one of the upper or lower elastic members with the position detection sensor.

A system includes an initiating optics layer interposed between an electromagnetic (EM) source and a lenslet steering layer, where the lenslet steering layer includes a first positive lens element and a second negative lens element. The lenslet steering layer is interposed between the initiating optics layer and a concluding optics layer. The system includes a steering controller configured to steer an EM beam from the EM source by controlling a first relative rotation between the first positive lens element and the second negative lens element, and further by controlling a second absolute rotation of the lenslet steering layer. The system includes a rotating actuator responsive to rotation commands from the steering controller, where the rotating actuator selectively rotates the first positive lens element and/or the second negative lens element.

A system includes an initiating optics layer interposed between an electromagnetic (EM) source and a lenslet steering layer, where the lenslet steering layer includes a first positive lens element and a second negative lens element. The lenslet steering layer is interposed between the initiating optics layer and a concluding optics layer. The system includes a steering controller configured to steer an EM beam from the EM source by controlling a first relative rotation between the first positive lens element and the second negative lens element, and further by controlling a second absolute rotation of the lenslet steering layer. The system includes a rotating actuator responsive to rotation commands from the steering controller, where the rotating actuator selectively rotates the first positive lens element and/or the second negative lens element.

A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.

A magnification optical system forms an enlarged image of an object. It includes a refractive optical system including a plurality of lens groups; and a mirror train including a curved mirror, arranged in this order from an object side, a first focus structure configured to move the respective lens groups of the refractive optical system by different amounts along a normal line of a conjugate surface on the object side, and a second focus structure configured to move the respective lens groups along the normal line of the conjugate surface on the object side by different amounts from those of the first focus structure.

The tri-axis close-loop feedback controlling module for electromagnetic lens driving device comprises a 6-pin Hall element. Two pins of the Hall element are coupled to an auto-focus module for providing a current to drive the auto-focus module to conduct auto-focusing operations along the Z-axis; while other four pins of the Hall element are coupled to a control unit. The control unit detects the X-Y axial positions of the auto-focus module relative to an OIS module and generates a control signal which is then sent to the Han element. Therefore, the Hall element not only can provide its own feedback controlling function according to the Z-axial position of lens, but also can drive the auto-focus module based on the control signal corresponding to the X-Y axial positions of the auto-focus module, so as to achieve the goal of tri-axis close-loop feedback controlling for the electromagnetic lens driving device.

Disclosed are a head mounted display (HMD), and a method for controlling the same. The HMD includes: a body having a display unit; a lens driving unit provided at the body, and configured to move a lens unit spaced apart from the display unit, wherein the lens driving unit includes: a lens frame having a first tube portion protruded in a first direction, and coupled to the body; a lens housing having a second tube portion protruded in the first direction and having the lens unit, the second tube portion relatively moved on the first tube portion; a link unit coupled to the lens frame and the lens housing, and configured to move the lens housing; and a driving unit provided at one side of the first tube portion, and configured to operate the link unit.

One embodiment of a lens driving apparatus may comprise: a bobbin having a first coil disposed on the outer circumferential surface thereof; a position detection sensor which is disposed on the outer circumferential surface of the bobbin and which moves together with the bobbin; a first magnet disposed opposite to the first coil; a housing for supporting the first magnet; upper and lower elastic members which are coupled to the bobbin and the housing; and a plurality of wirings which are disposed on the outer circumferential surface of the bobbin so as to electrically connect at least one of the upper or lower elastic members with the position detection sensor.

A lens barrel that achieves modes with and without an optical element while reducing a size in an optical axis direction. A first drive mechanism moves a first optical element in the optical axis direction. A second optical element is located at an image surface side of the first optical element and is selectively inserted in an optical path. A second drive mechanism moves a holding member that holds the second optical element in a direction different from an optical axis. A control unit controls the first drive mechanism to move the first optical element to an object side to a position where the first optical element and the holding member are not in an overlap state when viewing in a direction perpendicular to the optical axis, controls the second drive mechanism to remove the second optical element from the optical path, when they are in the overlap state.