| 摘要 |
<p>PURPOSE:To make induction by an external magnetic field difficult by providing a photoelectric converter, an optical fiber of necessary length, a nonmagnetic photoelectric converter, etc. CONSTITUTION:This magnetometer is equipped with the photoelectric converter 12 which converts the current signal from a phase detector 7 which is passed through a feedback resistance 9 and the high frequency current signal from an RF oscillator 8 at the same time, the optical fiber 13 which transmits the output light of this converter 12 by necessary length, and the nonmagnetic photoelectric converter 14 which converts the output light from the fiber 13 into a current signal. Then the converter 14 is arranged nearby a feedback modulating coil 3 within the range wherein an extremely small magnetic noise exerts no adverse influence, and the output light from the fiber 13 is converted into the current signal, which is sent to a coil 3. Thus, the feedback modulated current signal transmitted by the system of the converter 12, fiber 13, and converter 14 is not induced by the external electromagnetic field.</p> |
