FIELD: testing equipment.
SUBSTANCE: invention is related to facilities for investigation of magnetic properties of objects (BN), first of all, sheet material, such as, for instance bank notes, with application of magnetooptic layer having magnetic domains. In method and device optical properties of magnetic domains in magnetooptic layer are influenced by magnetic properties of investigated object (BN), at least one source of light (2) for radiation of light falling on magnetooptic layer (42), and at least one detector (6) for reception of light passing through magnetooptic layer (42) and/or reflected by it, and with creation of magnetic field (BN), which spreads in area of magnetooptic layer (42) substantially parallel to its surface.
EFFECT: improved accuracy and reliability of research.
16 cl, 4 dwg
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