Mirror controller for optical switch

A mirror controller of 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;
• and
• at least one image analyzer detecting the light of the optical signal scattered by at least one of the tilt mirrors and the output collimator;
• wherein the at least one image analyzer 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 as said 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 signal generating part includes a first signal generator and a second signal generator,
• wherein the at least one image analyzer is a single image analyzer,
• the single image analyzer detecting, as a first control position, the position of the light beam image radiated on the output mirror array by detecting the optical signal output from the first signal generator, passed through the input collimator array, reflected on the input mirror array and then scattered by the output mirror array, the single image analyzer controlling the tilt mirrors on the input mirror array in such a manner that the detected first control position coincides with a first desired target position of a light radiated on the output mirror array through the output collimator by the second signal generator,
• the single image analyzer detecting, as a second control position, the position of the light beam image radiated on the input mirror array, based on the optical signal output from the second signal generator, passed through the output collimator, reflected on the output mirror array and then scattered by the input mirror array, the single image analyzer controlling the tilt mirrors on the input mirror array in such a manner that the detected second control position coincides with a second desired target position of the light radiated on the input mirror array through the input collimator array by the first signal generator.