Thursday 28 March 2024

automatic translation

Thursday 28 March 2024

automatic translation

    Dichroic glass: XNUMXth century special effects


    Il dichroic glass it's a glass containing micro-layers of metal oxides which give the glass treated in this way particular optical properties and an iridescent appearance.

    This type of artifact is exploited for purposes artistic and high technology, for example the “dichroic” halogen lamps used for special lighting.

    The invention of dichroic glass is often mistakenly attributed to NASA (dichroic filters), but the dichroic glass dates back to at least the XNUMXth century, as can be seen from the Cup of Lycurgus.

    The cup of Lycurgus, illuminated from the rear, exhibits a red color - wikipedia.it

    It's glass cup from the Roman period which takes on a red color when lit from behind; green when it is illuminated from the front.

    In this case, thedichroic effect is obtained by gold and silver nanoparticles, by virtue of a process probably not well understood or controlled by the producers, and most likely the result of accidental contamination.

    Modern dichroic or bi-color glass production is achieved through a multi-layer coating process.

    Crystals of quartz e oxides of different metals such as titaniumchromealuminumzirconiummagnesium they are vaporized with an electron beam in a vacuum chamber, where they end up condensing on a surface in crystalline form.

    This material is then generally hot worked, and can be used in raw form.

    La main feature of dichroic glass is the color of reflected light that is iridescentThis is because the color of the transmitted light is different from that obtained by reflection.

    display cabinet / display case in dichroic glass - vetreriabazzanese.com

    The Roman industry of the XNUMXth century achieved such a sophisticated use of additives that it led to the production of dichroic glasses.

    Currently, dichroic glass is suitable for customization in the architecture of private and public spaces with various types of furniture components.

    Source: wikipedia.it, vetreriabazzenese.com

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