Application of the Fourier analysis methods to the three beam interferometry

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• 作者：Agnieszka Popio?ek-Masajada ; ^{Agnieszka.Masajada@pwr.wroc.pl} ; Monika Borwi¨½ska ; Tadeusz Przerwa-Tetmajer ; Piotr Kurzynowski
• 关键词：Optical vortex ; Interferometry ; Fourier analysis
• 刊名：Optics and Laser Technology
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：48
• 期：Complete
• 页码：503-508
• 全文大小：727 K

文摘

In this paper, method for enhancing the measurement capability of an optical vortex interferometer is proposed. We adapted the techniques used in the carrier frequency interferometry to describe a way of measuring the change of the object's beam propagation direction and of reconstructing the geometry of its wavefront. To do this the interference field of the three beam interferogram and its Fourier spectrum has been calculated. The experimental results obtained with the presented technique are in agreement with the results obtained by using the analysis applied to the optical vortex interferometer. The proposed method does not require any alterations in the optical vortex interferometer body. The calculations are performed on the single three-beam interferogram which is fundamental for the optical vortex interferometry. In this way we take advantage of both, the carrier frequency as well as the optical vortex interferometry.