Improved modelling of the magneto-optic angular displacement sensor

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Melikhov, Y.^{a; *} | Park, C.M.^b | Lee, S.J.^a | Hauser, H.^c | Jiles, D.C.^a

Affiliations: [a] Center for Nondestructive Evaluation, Iowa State University, Ames, Iowa 50011, USA | [b] Department of Physics, Seonam University, Namwon 590-711, Korea | [c] Institute of Sensor and Actuator Systems, Vienna University of Technology, A-1040 Vienna, Austria

Correspondence: [*] Corresponding author. Tel.: +1 515 294 5385; Fax: +1 515 294 8727; E-mail: melikhov@iastate.edu

Abstract: An improved model for simulations of the reflected intensity of the new magneto-optic angular displacement sensor for measuring small angular and spatial displacements of the surfaces of a material is presented. In this model, the diameter of the laser beam is taken into account which allows accurate description of the experimental response of the sensor. It was also confirmed that the differential changes in time dependence of intensity, not its absolute value, could serve as a parameter for estimation of the amount of rotation of the sample surface.

Keywords: Angular displacement sensor, magneto-optics, Faraday rotation, sensor

DOI: 10.3233/JAE-2007-864

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 205-209, 2007