Flatness tolerances of tempered glass are discussed very often when large size glazing´s are installed in high rise buildings with a high demand on the optical quality. Up to know certain quality levels are mentioned in the relevant product standards. But very often these criteria are not sufficient for architects and building owners or investors to reach the desired quality in terms of flatness. For projects the agreed tolerances are very often verified in physical mock- ups. But to compare different levels of the flatness tolerances it is nearly impossible to supply glass with different levels of flatness tolerances. Here software tools can help to visualize the flatness tolerances. With this the number of mock- ups could be perhaps reduced, which finally helps also the CO2 footprint. The paper will describe how this visualization tools are working and what are the basic differences of the different techniques of this kind of software tools are. Further on we show examples of the visualization of the flatness and the degree of it. We also describe the limits of this solution and the benefits of it.
Michael Elstner
Optical Distortion in tempered glass – a claim or a feature and how to visualize it
Company: AGC Glass Europe, Louvain-la-Neuve, Belgium
About the speaker:
Michael Elstner is the manager of the Technical Advisory Service at AGC Glass Europe. He was working for nearly 20 years for AGC INTERPANE as the Head of Technical Consultancy Service and a Director of INTERPANE E & B. He is member of the board in different associations, as ift Rosenheim e. V., Bundesverband Flachglas e. V. or also Gütegemeinschaft Flachglas e. V.. He as also member of different working groups and standard committees which are addressing the application of glass.
