Utilization of optical properties of magnetic fluid for detecting the presence of magnetic fields

Norbert Tarjányi; Daniel Káčik

doi:10.1117/12.2621528

17 May 2022 Utilization of optical properties of magnetic fluid for detecting the presence of magnetic fields

Norbert Tarjányi, Daniel Káčik

Proceedings Volume 12139, Optical Sensing and Detection VII; 121391H (2022) https://doi.org/10.1117/12.2621528
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Conference Poster

Abstract

In the contribution, we present the preliminary results of an investigation of the effect of a magnetic field applied on a thin magnetic fluid layer placed between two crossed plane polarizers on its transmittance in the visible spectral range. We used samples of two different thicknesses and a supercontinuum white light source for investigation. The magnetic field was generated by a solenoid with an iron core and applied parallel to the magnetic fluid surface and at the same time, perpendicular to the direction of light propagation. We changed the strength of the magnetic field, its direction with respect to the orientation of the polarization planes of the polarizers and recorded the intensity of light transmitted through the samples. A quite strong effect of the magnetic field on the transmittance of the magnetic fluid thin layer placed between two crossed plane polarizers was observed which is promising for sensor applications utilizing the presence of an external magnetic field.

Citation Download Citation

Norbert Tarjányi and Daniel Káčik "Utilization of optical properties of magnetic fluid for detecting the presence of magnetic fields", Proc. SPIE 12139, Optical Sensing and Detection VII, 121391H (17 May 2022); https://doi.org/10.1117/12.2621528

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