Patent ID: 7466915

Claim:
A mirror controller for an optical switch including a mirror array having a plurality of tilt mirrors for controlling the angle of the reflection surface of the tilt mirrors to lead an input optical signal to a desired position of an output collimator, comprising: a signal generating part passing an optical signal on the same light path as an optical communication using the optical switch; at least two image analyzers detecting the light of the optical signal scattered by at least one of the tilt mirrors and the output collimator; wherein the at least two image analyzers each detects the position of a light beam image as a control position based on the scattered light and controls the tilt mirrors in such a manner that the control position detected coincides with a predetermined desired target position on at least one of the tilt mirrors and the output collimator; wherein the optical switch includes an input mirror array and an output mirror array contained in the mirror array, an input collimator array arranged in opposed relation to the input mirror array and the output collimator arranged in opposed relation to the output mirror array; wherein the at least two image analyzers include a first image analyzer and a second image analyzer, the first image analyzer detecting, as a first control position, the position of the light beam image on the output mirror array based on the optical signal output from the signal generating part, passed through the input collimator array, reflected on the input mirror array and scattered by the output mirror array, the first image analyzer controlling the tilt mirrors on the input mirror array in such a manner that the first control position detected coincides with a predetermined desired first target position of the output tilt mirrors, the second image analyzer detecting, as a second control position, the position of the light beam image reflected on the output collimator based on the light beam image reflected on the output mirror array and scattered by the output collimator array, the second image analyzer controlling the tilt mirrors on the output mirror array in such a manner that the detected second control position coincides with a predetermined desired second target position of the output collimator.