3 May 1994 Application of phase-contrast microscopy to quantitative characterization of optical fibers
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Proceedings Volume 1846, Phase Contrast and Differential Interference Contrast Imaging Techniques and Applications; (1994); doi: 10.1117/12.171874
Event: Phase Contrast and Differential Interference Contrast Imaging Techniques and Applications, 1992, Warsaw, Poland
Abstract
Application possibilities of phase contrast method in investigations of both isotropic and anisotropic optical fibers are discussed. In particular, this method enables the core diameter and other geometrical parameters of GRIN fibers to be determined more accurately when it is combined with scanning microdensitometry. Refractive index profile of some fibers, especially that of monomode fibers, can be determined by using a negative phase contrast device if the difference (Delta) n between refractive indices of the fiber core and cladding is very small (at any rate smaller than 0.03). The result obtained is comparable to that offered by differential microinterferometry. In general, highly sensitive negative phase contrast microscopy, such as that based on the KFA device with soot phase rings (commercially available from the Polish Optical Works, Warsaw), permits us to observe extremely small optical inhomogeneities, which cannot be revealed with the help of conventional microinterferometric techniques.
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Miroslawa Bozyk, "Application of phase-contrast microscopy to quantitative characterization of optical fibers", Proc. SPIE 1846, Phase Contrast and Differential Interference Contrast Imaging Techniques and Applications, (3 May 1994); doi: 10.1117/12.171874; https://doi.org/10.1117/12.171874
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