30 results about "Magnetic field imaging" patented technology

The utility model relates to an experimental device for nuclear magnetic resonance edge magnetic field imaging, which relates to nuclear magnetic resonance imaging. Equipped with servo motor, voice coil motor, coarse adjustment non-magnetic lifting platform, fine adjustment non-magnetic lifting platform, nuclear magnetic resonance edge magnetic field imaging probe, sample chamber, probe coil and sample relative movement / stationary conversion pin, coarse adjustment and fine adjustment non-magnetic Lifting table grating ruler and control system; the control system is equipped with a host computer, PMAC controller, servo motor driver and voice coil motor controller. Combining the two-stage lifting high-precision mechanical structure of coarse adjustment and fine adjustment with advanced closed-loop control algorithm, it can realize the high-precision movement of the sample with the highest precision of 1 μm, and complete the high-precision and high-resolution nuclear magnetic resonance edge magnetic field imaging. Two experimental methods, namely, the relative moving imaging between the probe coil and the sample and the relatively static imaging between the probe coil and the sample, can be realized without any secondary modification on an experimental device, which ensures that the strong magnetic environment is not affected to the greatest extent; the closed-loop control makes the sample The more precise the displacement, the more accurate the result.

The invention discloses a chip-level diamond NV-color center magnetic imaging device and method, and the method achieves the hyperfine magnetic field imaging of the two-dimensional surface of an object, such as a magnetic image of a biological cell. The method comprises the steps: carrying out the polarization of a laser pulse and a microwave pulse; generating fluorescent light generated at the NV-color center of a diamond in an external magnetic field; employing the laser pulse to generate fluorescent light again, wherein the difference result of fluorescent light of two times can reflect the magnetic field intensity of the NV-color center, thereby achieving the conversion of magnetic field information to optical information; and employing a nano-level convex lens group and a distributed optical imaging unit to convert an optical signal into an electric signal. The invention also relates to a packaging method for enabling a whole system to be packaged in a manner of chip level, and the method comprises temperature control and electromagnetic shielding. The method is great in value in the fields of biomedical research and medical diagnosis.

A microscopic electrical impedance imaging device based on diamond NV color centers, including: a magnetic field imaging module, using diamond ensemble NV as a weak magnetic field detector; a microwave radiation structure module, using an Ω-shaped radiation structure as a microwave antenna to send diamond NV color centers The microwave magnetic field is radiated; the microelectrode module uses a cross-shaped iridium-iridium oxide metal electrode with two pairs of electrode arms to inject an alternating current into the buffer solution. The present invention expands the spatial resolution of the existing magnetic resonance electrical impedance imaging, and improves the spatial resolution of the electrical impedance imaging to the micron to submicron scale, thereby realizing a microscopic electrical impedance imaging method, which is suitable for cells Conductivity imaging of biological samples.