Patent ID: 7122786
Filing Date: 2006-10-17
Classification: G02B

Abstract:
1. A controlling method of an optical switching device in which for said optical switching device including a first mirror array and a second mirror array, each arranged in a plane with a plurality of tilt-mirrors each having a controllable reflecting surface, and sequentially reflecting optical signals input thereto by said first mirror array and said second mirror array to output from specific positions, said controlling method controlling angles of the reflecting surfaces of the respective tilt-mirrors of said first and second mirror arrays, said controlling method comprising: detecting an arriving position and an arriving direction of an optical signal reflected by said second mirror array; and judging, based on said detecting, the angles of the reflecting surfaces of the tilt-mirrors which reflected said optical signals of said first mirror array and said second mirror array, and correction controlling the angles of the reflecting surfaces of said tilt-mirrors so that said angles approach previously set target values, respectively, wherein said detecting comprises branching a part of the optical signal reflected by said second mirror array and receiving a branched light at a light receiving surface thereof having a two-dimensional area to generate position information, and said judging comprises