The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2008
Filed:
Jul. 13, 2005
Thorsten Wilke, Alzey, DE;
Andre Witzmann, Waldershof, DE;
Rupert Fehr, Mitterteich-Pleussen, DE;
Johann Faderl, Nieder-Hilbersheim, DE;
Otmar Schmittel, Hamm, DE;
Ernst-walter Schaefer, Welgesheim, DE;
Christopher Fritsch, Mainz-Kastel, DE;
Thorsten Wilke, Alzey, DE;
Andre Witzmann, Waldershof, DE;
Rupert Fehr, Mitterteich-Pleussen, DE;
Johann Faderl, Nieder-Hilbersheim, DE;
Otmar Schmittel, Hamm, DE;
Ernst-Walter Schaefer, Welgesheim, DE;
Christopher Fritsch, Mainz-Kastel, DE;
Schott AG, Mainz, DE;
Abstract
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.