Patent ID: 7298972
Filing Date: 2007-11-20
Classification: G02B

Abstract:
1. An optical switch for switching communication light beams input from first external units through input-side optical fibers and propagating to second external units through output-side optical fibers, said optical switch comprising an input-side lens array, a primary mirror array, a secondary mirror array, an output-side lens array, two or more light emitting elements which do not emit communication light beams and two or more light receiving elements, said input-side lens array including a first plurality of input-side lenses adapted to couple to said input-side optical fibers and a second plurality of input-side lenses on which light beams are incident from said two or more light emitting elements, said primary mirror array including a first plurality of moving mirrors on which light beams passing through said first plurality of input-side lenses are incident, said secondary mirror array including a second plurality of moving mirrors on which light beams passing through said first plurality of input-side lenses are incident, said primary mirror array further including primary measuring mirrors on which light beams passing through said second plurality of input-side lenses are incident, said secondary mirror array further including secondary measuring mirrors on which light beams passing through said primary measuring mirrors are incident, said output-side lens array including a second plurality of output-side lenses on which light beams passing through said second plurality of moving mirrors are incident and adapted to couple to said output-side optical fibers, and a second plurality of output-side lenses on which light beams passing through said secondary measuring mirrors are incident and adapted to couple to said two or more light receiving elements, and said optical switch further comprising a mirror control unit for correcting control values for controlling angles at which said first plurality of moving mirrors and said second plurality of moving mirrors are moved, based on signals from said two or more light receiving elements which receive light beams passing through said second plurality of output-side lenses.