Patent ID: 9435999
Filing Date: 2016-09-06
CPC Classification: G02B,G21K

Claim Text:
1. A device for adjusting the curvature of a mirror by applying bending moments to both ends of the mirror or releasing the bending moments, the device comprising: a base block; a pair of rotating blocks, each of the pair of rotating blocks being connected to the base block through a first elastic body and being rotated around a connection portion between the base block and the first elastic body or elastically returning to its original position through the application or release of an external force; a pair of support blocks which are respectively disposed on the pair of rotating blocks to support both ends of the mirror, the pair of support blocks applying bending moments to both ends of the mirror by the rotation of the pair of rotating blocks; and a driving part rotating the pair of rotating blocks, wherein the first elastic body has a cantilever shape, an upper portion of the first elastic body is connected to the base block, a rotating point being the connection portion between the base block and the first elastic body, the connection portion being located at the upper portion of the first elastic body, a lower portion of the first elastic body is connected to the pair of rotating blocks and when viewed from a front side, the rotating point is disposed on the reflection surface of the mirror or at a position adjacent to the reflection surface of the mirror, and wherein the first elastic body connects the rotating blocks to the base block so that support points of the support blocks of the mirror are movable in a direction opposite to a moving direction of the central point of the mirror by a change in the curvature of the mirror as the rotating blocks are rotated, wherein the driving part comprises: a first leaf spring provided in a pair to rotate each of the pair of rotating blocks, the first leaf spring having one end fixed to the rotating blocks; a second leaf spring disposed through a connecting member so that the second leaf spring is fixed at one end to the other end of the first leaf spring in a state where the second leaf spring is spaced a predetermined distance from the first leaf spring and disposed parallel to the first leaf spring; and a driver pressing or releasing the other end of the second leaf spring toward the first leaf spring.