Carrier fringes interferometry by superposing the first harmonic of two rulings with different period
| Autor: | Cruz Meneses-Fabian, Rosaura Kantun-Montiel, Gildardo-Pablo Lemus-Alonso, Carlos Robledo-Sanchez |
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| Rok vydání: | 2014 |
| Předmět: |
Diffraction
Physics Spatial filter Plane (geometry) Aperture business.industry Mechanical Engineering Fourier optics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Interferometry symbols.namesake Fourier transform Optics symbols Electrical and Electronic Engineering business Linear phase |
| Zdroj: | Optics and Lasers in Engineering. 54:27-30 |
| ISSN: | 0143-8166 |
| DOI: | 10.1016/j.optlaseng.2013.09.006 |
| Popis: | This paper presents a method for introducing carrier fringes in an interferogram based on the interference of first harmonic of two rulings with different periods. The setup is built on a 4f optical system consisting of two apertures in the input plane and a Ronchi ruling in the Fourier plane; in each aperture a Ronchi ruling of a different period is placed. This proposal is based on filtering in the Fourier plane the 1st-order of diffraction of each spectrum of the rulings in the object plane; we demonstrate that the slope of the generated linear phase depends directly on period difference. In this manuscript, we develop a theoretical model and show experimental results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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