Patent ID: 6930816
Filing Date: 2005-08-16
Classification: G02B

Abstract:
1. A spatial light modulator which comprises: support substrate that has an electrode layer; and movable thin film that has at least an electrode layer, and that is opposingly placed above said support substrate with being separated by a predetermined gap distance in a manner that said movable thin film is flexurally deformable toward said support substrate, and in which a predetermined driving voltage is applied between said electrode layer of said support substrate and said electrode layer of said movable thin film to cause said movable thin film to be deflected toward said support substrate by an electrostatic force acting between said electrode layers, whereby optical characteristics of said device with respect to incident light are changed to perform light modulation on the incident light, wherein a returning electrode is disposed on a side of said movable thin film, said side being opposite to said support substrate, said returning electrode applying an electrostatic force of attracting said movable thin film when a driving voltage is applied.