PROCEDIMENTO E DISPOSITIVO PER LA MISURA OTTICASENZA CONTATTO DELLO SPESSORE DI OGGETTI DI VETRO CALDI IN BASE ALLA ABERRAZIONE CROMATICA

The method measures the thickness of a hot glass body without direct contact with the glass body and is based on chromatic aberration. This method includes focusing a light beam from a light source on the hot glass body using a focusing device immediately after formation; conducting reflected light...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FEHR RUPERT, SCHAFER ERNST-WALTER, WITZMANN ANDRE, FRITSCH CHRISTOPHER, WILKE THORSTEN, SCHMITTEL OTMAR, FADERL JOHANN
Format: Patent
Sprache:ita
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Beschreibung
Zusammenfassung:The method measures the thickness of a hot glass body without direct contact with the glass body and is based on chromatic aberration. This method includes focusing a light beam from a light source on the hot glass body using a focusing device immediately after formation; conducting reflected light from the glass body into a spectrometer to obtain a reflected light spectrum; finding two wavelengths of the reflected light from the front side and the rear side of the glass body respectively at which reflected light intensities are maximum; determining the thickness of the glass body from the difference between the two wavelengths; maintaining the focusing device at a temperature below 120° C. during the measuring of the thickness and substantially preventing heat radiation from reaching the focusing device using at least one heat-blocking filter.