Optics: measuring and testing – Dimension – Thickness
Reexamination Certificate
2005-07-13
2008-08-19
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
Dimension
Thickness
C356S326000, C356S445000, C356S630000
Reexamination Certificate
active
07414740
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.
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Faderl Johann
Fehr Rupert
Fritsch Christopher
Schaefer Ernst-Walter
Schmittel Otmar
Schott AG
Stock, Jr. Gordon J
Striker Michael J.
Toatley , Jr. Gregory J.
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