2. Articole

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Author: search.filters.author.Chirita, ArcadyHas files: Yes

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    Effect of optical coating in the thin-film system of chalcogenide glassy semiconductor-dielectric when recording the holographic optical information [Articol]
    (2015) Chirita, Arcady; Prilepov, Vladimir; Popescu, Mihai; Andries, Ion; Caraman, Mihail; Jidcov, Iurie
    In this paper we show that the possibility of obtaining the high values of efficiency of relief-phase holographic gratings formed in the photo-thermoplastic recording process holds not only due to the non-sinusoidal profile form, but also due to the effect of optical coating that appears in the two-layer system of photo-semiconductor – deformed thermoplastic. Analyzed are the conditions, under which takes place the antireflection optical coating, reducing unwanted reflections from surfaces and thereby enhancing efficiency. It is shown that by careful choice of the thicknesses and refractive indices of the layers materials the efficiency of holographic gratings can be improved by 2-5 %.
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    A new approach to the testing of ice-forming aerosols in cloud environments [Articol]
    (Editura "Tehnica-UTM", 2015-05-20) Zasavitsky, E.; Kantser, Valeriu; Sidorenko, Anatolie; Belenchuk, Alexandr; Shapoval, Oleg M.; Chirita, Arcady
    The elaborated method allows tracking the dynamics of the process in climate chamber under impact of the ice-forming reagent. Simultaneous registration of cloud transmittance and recording of the ice forming process gives us an integral picture of AgI reagent effect on testing cloud. In this study we find a positive correlation between testing cloud transmission and ice particle formation. We showed that count of ice particles and determination of its density and size is possible directly in climate chamber as well as dynamics of particles deposition.