| 摘要 |
PURPOSE:To send information with sufficient quantity by allowing a laser ray from a sender side to be reflected by a receiver side and turned back and using a reflected light modulator to modulate even the reflected light for 2-way communication. CONSTITUTION:A laser ray (a) emitted from a transmitter A transmits through a reception window 36 of a receiver B and is reflected by a retro-reflector 33 to be a laser ray (b), it is emitted from the receiver B and is reflected in an opposite direction on the same path as the ray (a). The ray (b) is reflected upward by a Y axis deflection control mirror 24 and transmits through an X axis deflection control mirror 23 being a half mirror and is made incident onto a reflected light receiver. Then the signal of the transmitter A is superimposed on the ray (a) via a forward path signal modulator 22, and a signal detection section 35 of the receiver B detects and receives the signal. Furthermore, the signal of the receiver B is superimposed on the ray (b) via a reflected light modulator 32 to allow the receiver 27 of the transmitter A to receive the signal and to attain 2-way communication. |
