-
公开(公告)号：US20240306927A1
公开(公告)日：2024-09-19
申请号：US18607352
申请日：2024-03-15
申请人： SB Technology, Inc.
发明人： Geoffrey Zerbinatti Iwata , Christian Thieu Nguyen , Kevin Robert Tharratt , Maximilian Thomas Ruf , Tucker Blake Reinhardt , Jordan Edward Crivelli-Decker , Madelaine Susan Zoritza Liddy , Alison Emiko Rugar , Fuxi Lu , Ethan Jesse Pratt , Kit Yee Au-Yeung , Stefan Bogdanovic
CPC分类号： A61B5/05 , A61B5/7203 , A61B5/7246 , A61B5/725 , G01R33/0206 , G01R33/032 , G01R33/04 , G01R33/26 , A61B2562/0223 , A61B2562/046
摘要： A computer system receives a plurality of signals corresponding to first time-series magnetic data generated from a plurality of unshielded magnetometers proximate to the human subject. The first time-series magnetic data corresponds to magnetic fields generated from the human subject. The plurality of signals includes contributions from a biomagnetic field from at least a portion of the subject's organ and a background magnetic field. The computer system synchronizes the first time-series magnetic data to a common clock to generate synchronized time-series magnetic data. The computer system applies one or more filters to the synchronized time-series magnetic data to obtain filtered data. The computer system applies one or more noise reduction techniques to the filtered data to generate updated time-series magnetic data.
-
公开(公告)号：US20240201288A1
公开(公告)日：2024-06-20
申请号：US18389420
申请日：2023-11-14
申请人： Twinleaf LLC
IPC分类号： G01R33/26
CPC分类号： G01R33/26
摘要： 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.
-
3.发明授权公开(公告)号：US12007454B2
公开(公告)日：2024-06-11
申请号：US17689669
申请日：2022-03-08
申请人： HI LLC
摘要： A magnetic field measurement system includes a light source that emits a light beam; an optical fiber to transmit the light beam; a variable optical attenuator to increase stability of an intensity of the light beam; a beam splitter to divide the light beam into an OPM light beam and a monitor light beam; a monitor detector to detect the monitor light beam and generate a monitor signal; a vapor cell with alkali metal atoms disposed therein and configured for transmission of the OPM light beam through the vapor cell; an OPM detector to detect the OPM light beam after transmission through the vapor cell and generate an OPM signal; and a group delay filter to combine the monitor signal and the OPM signal to generate a reduced noise OPM signal, where the group delay filter accounts for a phase difference between the monitor signal and the OPM signal.
-
公开(公告)号：US11980466B2
公开(公告)日：2024-05-14
申请号：US17160109
申请日：2021-01-27
申请人： HI LLC
发明人： Micah Ledbetter , Ricardo Jimenez-Martinez , Julian Kates-Harbeck , Benjamin Siepser , Benjamin Shapiro
CPC分类号： A61B5/245 , A61B5/248 , A61B5/6803 , G01R33/26 , A61B2562/0223
摘要： An actuated magnetic field is generated at a plurality of distinct frequencies that at least partially cancels an outside magnetic field at the plurality of distinct frequencies, thereby yielding a total residual magnetic field. The total residual magnetic field is coarsely detected and a plurality of coarse error signals are respectively output. The total residual magnetic field is finely detected and a plurality of fine error signals are respectively output. The actuated magnetic field is controlled respectively at the plurality of distinct frequencies at least partially based on at least one of the plurality of coarse error signals, and finely controlled respectively at the plurality of distinct frequencies at least partially based on at least one of the plurality of fine error signals.
-
公开(公告)号：US11940509B2
公开(公告)日：2024-03-26
申请号：US17813167
申请日：2022-07-18
申请人： William Goodman
发明人： William Goodman
IPC分类号： G01R33/26
CPC分类号： G01R33/26
摘要： A magnetometer includes a magnetically isolated chamber having an opening to receive a sample; one or more Optically Pumped Magnetometer (OPM) sensors positioned inside the magnetically isolated chamber; an actuator mounted on a frame, the actuator moving an end portion in and out of the magnetically isolated chamber; and a sample holder coupled to the end portion.
-
公开(公告)号：US11839474B2
公开(公告)日：2023-12-12
申请号：US16884672
申请日：2020-05-27
申请人： HI LLC
发明人： Ethan Pratt , Hooman Mohseni , Stephen Garber
CPC分类号： A61B5/245 , A61B8/587 , G01R33/26 , G09B23/30 , A61B2576/026
摘要： A neural phantom device configured and arranged to produce a magnetic field to simulate a neural signal. The neural phantom device includes a driver having a signal source configured to produce a simulated neural signal, and either i) a carrier wave source configured to produce a carrier wave having a frequency of at least 250 Hz or ii) an optical carrier wave source configured to produce an optical carrier wave, wherein the driver is configured to modulate the simulated neural signal using the carrier wave or optical carrier wave to generate a modulated signal. The neural phantom device also includes a phantom configured to receive the modulated signal, demodulate the modulated signal to recover the simulated neural signal, and generate the magnetic field in response to the simulated neural signal.
-
公开(公告)号：US11835603B2
公开(公告)日：2023-12-05
申请号：US17829413
申请日：2022-06-01
IPC分类号： G01R33/26
CPC分类号： G01R33/26
摘要： An optically pumped magnetometer includes cells configured to form a first cell region and a second cell region on a measurement target, a pump laser, a probe laser, a first optical system configured to cause pump light to be incident on the first cell region, a second optical system configured to cause the pump light having passed through the first cell region to be incident on the second cell region, a third optical system configured to cause first probe light to be incident on the first cell region, a fourth optical system configured to cause second probe light to be incident on the second cell region, detection portions configured to detect the first probe light having passed through the first cell region and the second probe light having passed through the second cell region, and a deriving portion configured to derive an intensity of a magnetic field.
-
8.发明公开公开(公告)号：US20230333178A1
公开(公告)日：2023-10-19
申请号：US17722017
申请日：2022-04-15
申请人： Raytheon Company
IPC分类号： G01R33/26 , G01R33/032
CPC分类号： G01R33/26 , G01R33/032
摘要： A controllable bias field Bbias is applied to a single total-field OPM to maintain signal lock when an observable magnetic field Bmeas enters the OPM's dead zone. One or more electromagnetic (EM) coils are placed in proximity to the single OPM. Based on either a calibration of the field or a measured signal strength, a current command is calculated and applied to the one or more coils to produce the bias field Bbias to lift the observable magnetic field Bmeas out of the dead zone. The bias level is updated at a rate sufficient to maintain signal lock without interfering with the operation of the OPM. This allows a single OPM to sense the observable magnetic field Bmeas in all directions without having to either re-orient the OPM or to use multiple orthogonally positioned OPMs.
-
公开(公告)号：US11774526B2
公开(公告)日：2023-10-03
申请号：US17472209
申请日：2021-09-10
申请人： X Development LLC
CPC分类号： G01R33/323 , G01N24/10 , G01R33/26
摘要： A magnetometer includes a sample signal device; a reference signal device; a microwave field generator operable to apply a microwave field to the sample signal device and the reference signal device; an optical source configured to emit light including light of a first wavelength that interacts optically with the sample signal device and with the reference signal device; at least one photodetector arranged to detect a sample photoluminescence signal including light of a second wavelength emitted from the sample signal device and a reference photoluminescence signal including light of the second wavelength emitted from the reference signal device, in which the first wavelength is different from the second wavelength; and a magnet arranged adjacent to the sample signal device and the reference signal device.
-
公开(公告)号：US11766217B2
公开(公告)日：2023-09-26
申请号：US17328271
申请日：2021-05-24
申请人： HI LLC
CPC分类号： A61B5/6803 , A61B5/246 , G01R33/26 , A61B2562/0223
摘要： A magnetic field recording system includes a headgear to be placed on a user; optically pumped magnetometers (OPMs) disposed in or on the headgear to detect magnetic fields; at least two sensing modalities selected from the following: i) a magnetic sensing modality, ii) an optical sensing modality, or iii) an inertial sensing modality; and a tracking unit configured to receive, from each of the at least two sensing modalities, a corresponding magnetic data stream, optical data stream, or inertial data stream and to track a position or orientation of the headgear or user; and a system controller configured to control operation of the OPMs and to receive, from the tracking unit, the position or orientation of the headgear or user.
-
-
-
-
-
-
-
-
-
搜索结果
436 条记录 (耗时 0.029 秒)
