| 摘要 |
PURPOSE:To prevent malfunction due to sun-ray. CONSTITUTION:In the case of transmission of optical space communication, an optical beam emitted from a light emitting element 29 is reflected by a movable mirror 23 and in the case of reception, a light beam from an opposite equipment is made incident on a light receiving element 27 via the movable mirror 23. When a change in the posture of the equipment takes place, a position detection element 31 detects a moving distance of a spot light and a signal processing circuit 32 calculates a posture change in the equipment and a drive circuit 37 turns movable mirror 23 based on the posture change to correct the communication optical axis. Furthermore, a solar orbit computing element 34 calculates a time zone when the sun-ray is made incident on the light receiving element 27 or the position detection element 31 and when the sun-ray is made incident on the light receiving element 27, the communication is interrupted, and when the sun-ray is made incident on the position detection element 31, the communication optical axis correction is interrupted. |
