| 摘要 |
PROBLEM TO BE SOLVED: To prevent the disconnection of a line even when frost, etc., takes place by allowing a transmitting end to grasp the light received result of a light receiving end of a light beam and transmitting an information signal at an appropriate transmission rate. SOLUTION: A central processing unit 31 controls the operation of this entire optical space transmitting device and carries out prescribed processing procedures according to control data DC inputted from a network interface circuit 29. The unit 31 controls the operation of an actuator driving circuit 38 based on positional deviation information inputted from an analog to digital conversion circuit 37. That is, when a receiving light beam L2 is made incident from a device that is a speech communication object at the time of installation, a transmission light beam L1 is emitted in the incoming direction of the beam L1 and a line is set up. Also, when the line is set up, similarly, the operation of the circuit 38 is controlled according to the positional deviation information and consequently, the line is maintained even if the whole is vibrated owing to wind, etc. |
