| 摘要 |
PURPOSE:To reduce the general loss of the branch circuit as well as to simplify the structure by providing the branch line to the optical fiber itself. CONSTITUTION:Two-way optical communication circuit 21 comprises optical fiber 22 and 23, luminius element 24, photo detector 25 plus evaporation film 27 each. Film 27 is formed by cutting obliquely the optical fiber and polishing the cut surface into the flat surface, featuring the semitransparent mirror. Thus the optical signals transmit through or are reflected on film 27 to be turned into the transmission and reception signals. |
