To provide an optical space transmission system which relaxes the demanded accuracy of the angle adjustment of an optical transmitter, in a system wherein optical signal is used to transmit data in a free space.
The optical space transmission system comprises the optical transmitter, an optical receiver, an angle adjustment part for adjusting the angle of the optical transmitter, and a light-receiving adjustment part for moving the position of a light-receiving part in parallel. The angle adjustment part of the optical transmitter performs angle adjustment (rough adjustment) so that the emitted light enters the regulated range of the optical receiver, and the light-receiving adjustment part moves the light-receiving part within the regulated range, to perform position adjustment (fine adjustment) so as to maximize the light reception power, when the optical receiver detects the reception of light from the optical transmitter within the regulated range, whereby the precision requested in the control of the emission angle of the optical transmitter can be relaxed.
Hiroki Naito
Daisuke Nagano