Patent ID: 7002725

Claim:
A micro grating structure, comprising: a substrate; a first supporting structure and a second supporting structure; a first structure post and a second structure post, wherein said first structure post and said second structure post are mounted on said substrate between said first supporting structure and said second supporting structure; and a grating mounted between said first structure post and said second structure post and comprising a first, a second, a third and a fourth torsion beams, wherein said first and said second torsion beams are connected to said first and said second supporting structures respectively, said third and said fourth torsion beams are connected to said first and said second structure posts respectively, and said first, said second, said third and said fourth torsion beams are twisted by an electrostatic force so as to enable said grating to be inclined at an angle with respect to said substrate, wherein a light is diffracted by said grating when said grating is inclined, and said light is reflected by said grating when said grating is returned to normal, which is resulting from a recuperative force of said first, said second, said third and said fourth torsion beams generated after said electrostatic force vanishes.