| abstract |
In a magnetic measurement of an optical pump type, it is possible to measure a magnetic field in a plurality of directions while the probe light is in one direction. In a magnetic field measuring apparatus 1, a light source 18 irradiates a gas cell 12 with linearly polarized light that serves as both pump light and probe light in the Z-axis direction, and a magnetic field generator 8 applies to the gas cell 12. An alternating magnetic field having the same period and different phase is applied to each of the X and Y axis directions. The calculation control unit 30 uses the X and Y axis direction components A x and A y of the alternating magnetic field and the spin polarization M x corresponding to the measured value W − of the magnetic sensor 10 to use the magnetic field C (C x , Cy , Cz ) are calculated. [Selection] Figure 1 |