One dimensional surface profilometry by analyzing the Fresnel diffraction pattern from a step
Optics
2013-11-19 v1
Abstract
When a coherent quasi-monochromatic light is reflected from a step, a diffraction pattern is formed that can be described by Fresnel-Kirchhoff integral and visibility of the fringes depends on the height of the step. In this paper, it is shown that the Fresnel diffraction from a step can be described by an interference-like formula. A relationship is derived between the visibility of the diffraction pattern from 1D step and the step height. Finally, a novel method is presented for 1D surface testing. The theoretical and experimental results are presented.
Cite
@article{arxiv.1311.4350,
title = {One dimensional surface profilometry by analyzing the Fresnel diffraction pattern from a step},
author = {Soghra Osanloo and Ahmad Darudi},
journal= {arXiv preprint arXiv:1311.4350},
year = {2013}
}
Comments
CIOMP-OSA Summer Session, Optical Engineering, Design and Manufacturing, Aug, 4-9, 2013