METHOD FOR STUDYING STRUCTURE OF MAGNETIC FIELDS USING LASER RADIATION Russian patent published in 2021 - IPC G01R29/00 

FIELD: control and measurement instruments.

SUBSTANCE: invention relates to control and measuring equipment. The registration of the diffraction pattern is realized in three planes: xy, yz and xz, since the nanoparticles of the magnetic liquid are located throughout the entire volume of the ferrofluid cell. In a magnetic field, they create three-dimensional speckle structures. To do this, it is necessary to transfer the plane of incidence of laser radiation on the face of the ferrofluid cell from xy to yz. In the yz plane, place the plane of the photosensitive layer of the video camera. Since only the laser and the camera move, and the ferrofluid cell remains in the same place in the interpolar space of the magnetic system, the coordination of the obtained spatial images of the lines of force by the distance in the interpolar space of the magnetic system is not required. Similar measurements are carried out for the xz plane.

EFFECT: visualization of magnetic field lines in three planes with the determination of the nature of changes in their density at different points, especially in the interpolar space of magnetic systems.

1 cl, 6 dwg