Patent ID: 7329015
Filing Date: 2008-02-12
Classification: G02B,G11B

Abstract:
1. A variable shape mirror comprising: a specular surface; a piezoelectric body that alters a shape of the specular surface by expansion and contraction thereof when a voltage is applied; and a substrate for supporting the piezoelectric body, wherein the piezoelectric body is made of a bulk material, the specular surface is formed on the piezoelectric body, the substrate supports the piezoelectric body on the side opposite to the side on which the specular surface is formed, a plurality of grooves are formed at a predetermined interval on the surface of the piezoelectric body on which the specular surface is formed, the grooves being arranged so as to surround the specular surface and filled with the conductive members, and the conductive members embedded in the grooves are formed to be electrodes having different polarities in alternating manner in the direction from the inner side to the outer side of the plurality of grooves.