| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an inexpensive photo-current sensor capable of reducing an output change due to a positional shift of a lead wire to provide a stable detection signal. SOLUTION: A photo-current sensor 12 is arranged in a gap provided in a core surrounding one portion of a lead wire to form a closed magnetic circuit, and a magneto-optical conversion part 124 of the photo-current sensor 12 is formed with a Faraday element 126 contacted closely to a ferromagnetic material 125 or inserted into a through hole 125a to block the through hole 125a arranged in the ferromagnetic material 125.</p> |
