| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical space transmission system to align an optical axis easily and fast. <P>SOLUTION: An optical terminal 1 rotates a transmission function portion 4 radiating a first pilot light from a LED 14, an optical access station 2 radiates a second pilot light from a wide-directional LED 34 when a wide-directional PD 19 light-receives the first pilot light, the optical terminal stops the rotation of the transmission function portion at a position to obtain a prescribed light-receiving intensity distribution and radiates a third pilot light from the LED when a 4-split PD 13 light-receives the second pilot light, and the optical access station rotates the transmission function portion 6 until the position to obtain the prescribed light-receiving intensity distribution and stops it when the 4-split PD light-receives the third pilot light. <P>COPYRIGHT: (C)2007,JPO&INPIT |
