Abstract

Aspects of a pulsed pump magnetometer improve upon previous pulsed pump magnetometers and gradiometers with the following features: the pumping is aided with a pulsed field coil parallel to the pump light, the pump laser module uses a pulse driver circuit integrated into the sensor, the pump laser module uses a wavelength selective element integrated in the laser module but separate from the emitter, and the sensor geometry is arranged so that the dead axis can be easily reoriented by rotating the long axis of the sensor. A preferred sensor geometry, with the pump axis perpendicular to the long edge of the sensor, allows a sensor to be easily rotated to avoid a low signal condition.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

The pulsed pump magnetometer (PPM) is a new type of magnetometer with much higher dynamic range, linearity, and sensitivity than all other types of magnetometers. These features allow more faithful subtracting and cancelling sources of magnetic noise, enabling high quality biomagnetic measurements. Using an array of PPM sensors enables high quality measurements of biomagnetic signals even in magnetically noisy, real-world conditions like medical offices. Arrays of PPM sensors improve upon pulsed magnetic gradiometers in providing higher sensitivity per sensor and superior noise rejection through noise decorrelation and covariance modeling. Arrays of PPM sensors enable localization and imaging of biomagnetic sources.

IPC Classes  ?

• A61B 5/243 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetocardiographic [MCG] signals
• A61B 5/242 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• A61B 5/248 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoneurographic [MNG] signals, e.g. magnetospinographic [MSG] signals
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

Aspects of a pulsed pump magnetometer improve upon previous pulsed pump magnetometers and gradiometers with the following features: the pumping is aided with a pulsed field coil parallel to the pump light, the pump laser module uses a pulse driver circuit integrated into the sensor, the pump laser module uses a wavelength selective element integrated in the laser module but separate from the emitter, and the sensor geometry is arranged so that the dead axis can be easily reoriented by rotating the long axis of the sensor. A preferred sensor geometry, with the pump axis perpendicular to the long edge of the sensor, allows a sensor to be easily rotated to avoid a low signal condition.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping

Abstract

The pulsed pump magnetometer (PPM) is a new type of magnetometer with much higher dynamic range, linearity, and sensitivity than all other types of magnetometers. These features allow more faithful subtracting and cancelling sources of magnetic noise, enabling high quality biomagnetic measurements. Using an array of PPM sensors enables high quality measurements of biomagnetic signals even in magnetically noisy, real-world conditions like medical offices. Arrays of PPM sensors improve upon pulsed magnetic gradiometers in providing higher sensitivity per sensor and superior noise rejection through noise decorrelation and covariance modeling. Arrays of PPM sensors enable localization and imaging of biomagnetic sources.

IPC Classes  ?

• A61B 5/243 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetocardiographic [MCG] signals
• A61B 5/242 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents
• A61B 5/245 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
• A61B 5/248 - Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoneurographic [MNG] signals, e.g. magnetospinographic [MSG] signals
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday

Goods & Services

Magnetic Sensors and Testing Equipment, namely, magnetometer to measure magnetic field Scientific Research and Development

Goods & Services

Magnetic Sensors and Testing Equipment

Abstract

Magnetometers, atomic sensors and related systems, methods and devices are disclosed. The magnetometer includes an alkali vapor cell and illumination source configured to emit light and a detector that receives the light and a heating element. The magnetometer also includes a folded baseplate such that light emitted from the illumination source is directed to the alkali vapor cell, and light emerging from the alkali vapor cell is directed to the light detector.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• G01R 33/032 - Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday
• H05K 1/02 - Printed circuits Details
• H05B 3/26 - Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
• G01C 19/62 - Electronic or nuclear magnetic resonance gyrometers with optical pumping

Abstract

Magnetometers, atomic sensors and related systems, methods and devices are disclosed. In one configuration, an assembly for use in a high-sensitivity atomic sensor can include an alkali vapor cell, at least one illumination source configured to emit light when activated, the emitted light having a first predetermined range of wavelengths, a light collector capable of collecting light in the first predetermined range of wavelengths, and a plurality of optical elements arranged such that (a) light emitted from the at least one illumination source is directed to the alkali vapor cell, and (b) light emerging from the alkali vapor cell is directed to the light collector.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping
• G01C 19/62 - Electronic or nuclear magnetic resonance gyrometers with optical pumping

Abstract

Magnetometers, atomic sensors and related systems, methods and devices are disclosed.

IPC Classes  ?

• G01C 19/62 - Electronic or nuclear magnetic resonance gyrometers with optical pumping
• G01R 33/02 - Measuring direction or magnitude of magnetic fields or magnetic flux

Abstract

A compact, high-sensitivity magnetometer, including: an optical interface to accept a linearly polarized first light; a pump light source to produce a circularly polarized pump light; a vapor cell comprising a sealed vessel containing an alkali-metal gas, a first input port to receive the first light, a second input port to accept the pump light from a direction perpendicular to the first light, and an output port configured to produce a second light; an electromagnetic source configured to apply an electromagnetic field to the vapor cell at a direction perpendicular to the first light and the pump light; a second linear polarizer, having an axis of polarization perpendicular to the first light, the second polarizer configured to receive the second light and to produce a third light; and a photodetector configured to receive the third light, to produce an intensity measurement of the third light.

IPC Classes  ?

• G01R 33/26 - Arrangements or instruments for measuring magnetic variables involving magnetic resonance for measuring direction or magnitude of magnetic fields or magnetic flux using optical pumping