Patent ID: 8358925
Filing Date: 2013-01-22
Classification: G02B

Abstract:
1. A lens barrel, comprising: an annular barrel having a central axis; a plurality of first optical elements disposed in the barrel such that respective optical axes of the first optical elements are aligned coaxially with each other and the central axis of the barrel; an actuator device having a plurality of actuators, each having components that move rotationally relative to each other, a moving platform coupled to each of the actuators by a flexible hinge, and a central opening in the moving platform disposed concentric to a central axis of the actuator device, the actuator device being disposed in the barrel in front of the first optical elements such that the central axis of the actuator device is aligned coaxially with the central axis of the barrel and the optical axes of the first optical elements; a front cover attached to a front surface of the actuator device such that a central opening in the front cover is concentric with the central opening in the moving platform; and, a second optical element mounted in the central opening of the moving platform such that an optical axis of the second optical element is aligned coaxially with the central axis of the barrel, the optical axes of the first optical elements, and the central axis of the actuator device, and such that rotational movement of the actuators causes the moving platform and second optical element to move conjointly with a purely translation movement along the optical axis of the second optical element.