reduces anisotropy

  • Standard tempered glass is produced with isotropy values between 55 % and 80 %, making anisotropy visible depending on the degree of polarization in light, angle of observation and thickness of glass. This poor quality is accepted by industry standards. However, the argument that it cannot be avoided is a thing of the past.

    Arnold Glas has developed a new production process and measuring tool that allows for tempered glass to be produced with an anisotropy value smaller than 5% and thereby eliminates visible anisotropy. The product is called topview.

    Anisotropies diminish the visual quality of a glass surface and topview reduces them to such an extent that the human eye no longer perceives them as disruptive. This means that architectural design concepts are exploited to their best advantage – a distinct quality bonus for architects in particular.

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    StrainScanner™: arcon and ilis present world novelty

  • Using a special measuring process the isotropy value of all thermally treated glass (toughened safety glass/HS glass or laminated glass made up of toughened/HS glass) can be rated and documented. The quality of the tempering is verifiable for every single pane of glass and there are no more unpleasant surprises in respect of its visual appearance. The glass is guaranteed to meet specific isotropic values – and every facade using arcon topview is visually flawless.

    For more information please go to:

    StrainScanner™: arcon and ilis present world novelty


    What are anisotropies?

    The tempering process introduces different stresses into the cross-section of the glass. These areas of stress cause double refraction in the glass, which can become visible as a coloured zone in polarised light and is designated “anisotropy” or “polarisation field”.

    Normal daylight contains polarised light. The extent of the polarisation depends on the weather and the position of the sun. Anisotropies can become visible when the glass is viewed from a grazing or flat angle, when wearing polarising sunglasses or in certain installation conditions.