| 摘要 |
An optical communication system which does not require a re-adjusting operation of an irradiating direction of a light beam and is improved in convenience in use. The optical communication system includes first and second terminals remotely located from each other for transmitting therebetween a light beam carrying an information signal therein. A first light beam having a predetermined direction of polarization is generated in the first terminal and transmitted to the second terminal by way of an optical system while a second light beam having a different direction of polarization comes from the second terminal and is received by way of the optical system. A beam selector passes one of the first and second light beams and reflects the other light beam. An electric signal is generated in response to the received second light beam, and the direction of the first light beam is controlled in response to such electric signal. Such controlling operation is interrupted when the electric signal has a voltage level lower than a predetermined voltage level.
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