In this paper Fresnel diffraction of light from 1-dimensional and circular steps in reflection and transmission modes is theoretically and experimentally studied. The study shows that the diffraction pattern from each side of a step resembles the diffraction pattern from a semi infinite obstacle, but the visibility of fringes is a sensitive periodic function of the step height and the incident angle. This sensitive dependence can be exploited as a useful means for measuring the film thickeness, the refraction index and small displacements of objects in a manner easier and more precise that one can manage by the conventional interferometric methods.
M. T. Tavassoly, , H. Sahl-ol-bei, , M. Salehi, and H. R. Khalesifard, (2020). Fresnel diffraction from a step in reflection and transmission. Iranian Journal of Physics Research, 2(5), 237-246.
MLA
M. T. Tavassoly, , , H. Sahl-ol-bei, , , M. Salehi, , and H. R. Khalesifard, . "Fresnel diffraction from a step in reflection and transmission", Iranian Journal of Physics Research, 2, 5, 2020, 237-246.
HARVARD
M. T. Tavassoly , H. Sahl-ol-bei , M. Salehi , H. R. Khalesifard (2020). 'Fresnel diffraction from a step in reflection and transmission', Iranian Journal of Physics Research, 2(5), pp. 237-246.
CHICAGO
M. T. Tavassoly, H. Sahl-ol-bei, M. Salehi and H. R. Khalesifard, "Fresnel diffraction from a step in reflection and transmission," Iranian Journal of Physics Research, 2 5 (2020): 237-246,
VANCOUVER
M. T. Tavassoly , H. Sahl-ol-bei , M. Salehi , H. R. Khalesifard Fresnel diffraction from a step in reflection and transmission. Dear user; Recently we have changed our software to Sinaweb. If you had already registered with the old site, you may use the same USERNAME but you need to change your password. To do so at the first use, please choose, 2020; 2(5): 237-246.
