| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a photo-magnetic field sensor, and its part holder, together with method for manufacturing it wherein the number of parts is reduced, for low combination loss as well as improved productivity. SOLUTION: A photo-magnetic field sensor 1 comprises, as its main part, a base holder 2 wherein an out-going side optical fiber 11, out-going side semi- spherical lens 12, out-going side polarizer 13, magnetic-optical element 14, photo- detecting side polarizer 15, photo-detecting side semi-spherical lens 16, and photo-detecting side fiber 17 are mounted at specified parts, and a holder case 3 where the base holder is inserted into its recessed part 30. The sensor 1 uses an out-going side semi-spherical lens and photo-detecting side semi-spherical lens instead of out-going side lens and prism and photo-detecting side prism and lens which have been components of photo-magnetic field sensor, so the interval between an out-going side optical fiber and photo-detecting side optical fiber is small, thus an optical-combination loss is reduced, while productivity of photo-magnetic field sensor is improved thanks to decreased number of parts.</p> |
