Patent application number | Description | Published |
20090243610 | ATOMIC MAGNETOMETER AND MAGNETIC FORCE MEASURING METHOD - An atomic magnetometer includes a cell containing an atomic group, a pump light source, a probe light source, a mirror, and a detector. The cell is disposed between the pump light source and the mirror and between the probe light source and the detector. A pump beam emitted from the pump light source is circularly polarized light. The pump beam passes through the cell and is reflected by the mirror and then passes through the cell again. The probe beam emitted from the probe light source is linearly polarized light. An optical path of the probe beam is parallel to a plane of incidence of the pump beam and is also parallel to a surface of the mirror. The optical path of the probe beam crosses an optical path of the pump beam in the cell. The probe beam which has passed through the cell enters the detector. | 10-01-2009 |
20130082700 | NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS AND NUCLEAR MAGNETIC RESONANCE IMAGING METHOD - The present invention has an object to provide a nuclear magnetic resonance imaging apparatus or the like that avoids a region with zero sensitivity of an optical magnetometer and allows imaging by strong magnetic resonance when a common magnetic field is used as a bias field of an optical magnetometer and as a magnetostatic field to be applied to a sample. When a direction of a magnetostatic field application unit applying a magnetostatic field to a sample is a z direction, alkali metal cell of a scalar magnetometer is arranged so as not to overlap a region to be imaged in a z direction, and so as not to intersect the region to be imaged in an in-plane direction perpendicular to the z direction. | 04-04-2013 |
20130082701 | NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS AND NUCLEAR MAGNETIC RESONANCE IMAGING METHOD - The present invention has an object to provide a nuclear magnetic resonance imaging apparatus or the like that avoids a region with zero sensitivity of an optical magnetometer and allows imaging by strong magnetic resonance when a common magnetic field is used as a bias field of an optical magnetometer and as a magnetostatic field to be applied to a sample. When a direction of a magnetostatic field application unit applying a magnetostatic field to a sample is a z direction, alkali metal cells of a plurality of scalar magnetometers are arranged so as not to overlap a region to be imaged in a z direction, and so as not to intersect the region to be imaged in an in-plane direction perpendicular to the z direction. | 04-04-2013 |
20130127458 | MAGNETIC GRADIOMETER AND MAGNETIC SENSING METHOD - A gradiometer in which a probe beam for reading sequentially passes through two magnetic field measurement regions to obtain signals according to magnetic flux densities of the respective regions is formed using an optically pumped magnetometer. In particular, in a gradiometer using a high sensitivity optically pumped magnetometer, a geometric arrangement enabling obtainment of a large signal from a dipole moment as a signal source is defined. | 05-23-2013 |
20130207649 | OPTICALLY PUMPED MAGNETOMETER AND MAGNETIC SENSING METHOD - An optically pumped magnetometer and a magnetic sensing method acquire information as to strengths of magnetic fields in two different directions. A pump light having a circularly polarized component, first probe light having a liner polarized component and second probe light having a linearly polarized component are emitted to a cell containing a group of alkali metal atoms so as to form a crossing region A magnetic field applying unit applies a static magnetic field in a direction of the pump light incident on the crossing region during the emission of the pump light, the first probe light and the second probe light. And, information as to strengths of magnetic fields in two different directions perpendicular to the direction of the static magnetic field in the cell from the rotation angles of a polarization planes of the first and second probe lights during passage through the cell is calculated. | 08-15-2013 |
20140320123 | OPTICAL PUMPING MAGNETOMETER AND MAGNETIC SENSING METHOD - An optical pumping magnetometer is provided that is capable of improving the response of the magnetometer with respect to a magnetic field that varies with a period shorter than the transverse relaxation time of electron spin of an alkali metal atom. | 10-30-2014 |
20150022200 | OPTICALLY PUMPED MAGNETOMETER AND OPTICAL PUMPING MAGNETIC FORCE MEASURING METHOD - An optically pumped magnetometer having a single optical axis using atomic electron spin or nuclear spin includes a detection unit configured to detect an angle of a polarization plane of probe light having components of linear polarization and a modulation unit configured to apply a modulation to the angle of the polarization plane of the probe light having the components of linear polarization. The modulation unit is configured to control an offset in applying the modulation to the angle of the polarization plane of the probe light having the components of linear polarization according to the angle of the polarization plane of the probe light detected by the detection unit. | 01-22-2015 |
20150054504 | OPTICALLY PUMPED MAGNETOMETER AND METHOD OF MEASURING MAGNETIC FORCE - An optically pumped magnetometer includes: a modulation unit which allows rectangular wave modulation to an angle of a polarization plane of probe light; a detector for detecting a change of the angle of the polarization plane of the probe light transmitted through a cell; and a differential circuit for obtaining a difference in light intensity between components separated by a polarization splitter. Thus, both a reduction of a light intensity noise of the probe light and a separation and reduction of a noise defined by an inverse of a frequency in a low frequency area can be achieved. | 02-26-2015 |
Patent application number | Description | Published |
20130019982 | LINING MATERIAL FOR REHABILITATING HOST PIPE AND METHOD FOR REHABILITATING HOST PIPE USING SAME - A lining material for rehabilitating a host pipe, having low viscosity and very good impregnating property, in spite of low moisture content, and a method for rehabilitating a host pipe for repairing a pipeline, by providing lining at the inner face of a deteriorated host pipe (in particular, an underground pipe) using the same. A lining material for rehabilitating a host pipe, characterized by impregnating a curable furan resin composition containing a furan-based resin and a curing agent, to a resin absorbing base material in which one surface is liquid-tightly film coated. | 01-24-2013 |
20150051331 | THERMOSETTING FURAN RESIN COMPOSITION AND FURAN RESIN LAMINATED BODY USING THE SAME - A thermosetting furan resin composition comprising furan based resin (A), curing catalyst (B), and additive (C) that is a normal salt including a strong acid and a strong base is offered. The abovementioned additive (C) preferably has a solubility in water of 30 g/100 g H2O at 20° C. Furthermore, the abovementioned additive (C) is at least one selected from the group consisting of sodium chloride, potassium chloride, lithium chloride, sodium bromide, potassium bromide, lithium bromide, sodium sulfate, potassium sulfate, lithium sulfate, sodium nitrate, potassium nitrate, and lithium nitrate, or a mixture thereof. The content of the abovementioned additive (C) is 0.2-10 parts by weight based on the aforementioned furan based resin (A) being 100 parts by weight. | 02-19-2015 |