| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform conversion into an electrical signal by selecting one of a plurality of light signals, without using optical selection switches. <P>SOLUTION: The light signal transmitted by optical fibers 2a, 2b, 2c is supplied to corresponding photodiodes 8a, 8b, 8c. The photodiodes 8a-8c are connected to loads 10a, 10b, 10c in series for composing photoelectric convertors 6a, 6b, 6c. One end of the photoelectric convertors 6a, 6b, 6c are grounded, and the other end is connected to respective contacts 12a-12c of a change-over switch 12. The contact 12d of the change-over switch 12 is connected to the positive electrode of a battery 14, and the negative electrode is grounded. Electrical signal is generated by the operation of one of the photoelectric convertors 6a-6c, operated by the operation of the change-over switch 12 and is supplied to one output terminal 18. <P>COPYRIGHT: (C)2007,JPO&INPIT |
