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Papers on large core optical splitters [15–17] and wavelength division multiplexing module with thin film filters [18] prove that it is in principle possible to make multimode optical planar waveguides structures using large core waveguides that would have a good application po-tential. The main advantage of them, i.e. large core size that ease their installation, together with a low cost ...

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1PC 240mm Dia Large Optical PMMA Plastic Big Solar Fresnel Lens Magnifying Glass. EUR 20,94. EUR 22,52 + EUR 2,52 Versand

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Optical absorption measurements are carried out in particular to check the presence of chromium (III) and cobalt (II) ions in the polymeric matrix. The absorption spectra in the UV/VIS region (200–900 nm) for films of PMMA and PMMA doped with different contents of CrCl 3 are shown in Fig. 1. The observed spectrum of pure PMMA has an absorption band (shoulder) at about 273 nm. This band may ...

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