| 摘要 |
PURPOSE: A laser transmitter-receiver is provided to easily and accurately control the focus of a beam between two laser transmitter-receivers by making the transmitter and receiver of each laser transmitter-receivers have an optical shared area. CONSTITUTION: One side user arranges one laser transmitter-receiver(10) for transmitting and receiving signals or laser beams. The other side user arranges another laser transmitter-receiver(10') symmetrically with the one laser transmitter-receiver(10). The laser transmitter-receivers(10,10') are arranged to rotate at 180 deg. on a common axis. If one laser transmitter-receiver(10) transmits a laser beam, another laser transmitter-receiver(10') receives the laser beam. If another laser transmitter-receiver(10') transmits a laser beam, one laser transmitter-receiver(10) receives the laser beam. |
