Patent ID: 11965943
Assignee: RAYTHEON COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. A magnetometer, comprising:
a single total-field optically pumped magnetometer (OPM), said OPM having a detection zone along a Z-axis and an equatorial dead zone orthogonal to the Z-axis, a boundary separating the detection and dead zones defined by an angle theta θ1 from the Z-axis in an XYZ coordinate space; and
a single electromagnetic (EM) coil positioned proximate the OPM and oriented such that when energized the single EM coil produces a bias magnetic field Bbias that is substantially parallel to the Z-axis in a local volume around the OPM to move a Z-component of an observable field Bmeas up or down in the Z direction to move Bmeas from the equatorial dead zone into the detection zone, wherein Bbias is updated at a rate sufficient to maintain Bmeas in the detection zone while not interfering with operation of the OPM.