Ausrichtungseinstellsystem zur Verwendung in einem optischen Sende- und Empfangssystem

摘要

In an alignment adjusting system for use in an optical system in an optical transceiver, including an optical antenna (10) having a main mirror (1a) and a submirror (2), both of which being provided around an optical axis (CL) of said optical antenna (10), the optical antenna (10) being coupled through optical coupling means (4, 11 to 15) to the optical transceiver. The optical antenna (10) transmits a beam of transmitting light outputted from the optical transceiver to an optical antenna of a destination station after sequentially reflecting the beam of transmitting light by the submirror (2) and the main mirror (1a). A return-reflection mirror (1b) provided in either one of the main mirror (1a) and the submirror (2) return-reflects a part of the beam of transmitting light. A photodetector (30, 31) detects a defocusing amount of the beam of transmitting light in the optical antenna (10) in response to the beam of transmitting light return-reflected, and a moving mechanism moves the submirror in a direction parallel to the optical axis (CL) of the optical antenna (10). Further, a controller (20) controls the moving mechanism (2d) so that the defocusing amount of the beam of transmitting light becomes substantially zero, in response to a defocusing amount of the beam of transmitting light.