Method and system for measuring thickness of glass article
AssigneeCorning Incorporated
InventorsChong Pyung An, Sang-Mook Lee, James Patrick Trice
Life of this patent
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Abstract
A method includes introducing light into a glass article such that at least a portion of the introduced light is emitted from an edge of the glass article. The light emitted from an edge of the glass article is detected. An intensity profile of the emitted light is an intensity of the emitted light as a function of axial position. A first intensity boundary of the intensity profile and a second intensity boundary of the intensity profile are determined. A thickness of a layer of the glass article is determined based on an axial distance between the first intensity boundary and the second intensity boundary.
Claims13
A method comprising:
- (a) introducing light into a glass article such that at least a portion of the introduced light is emitted from an edge of the glass article;
- (b) detecting the light emitted from the edge of the glass article, an intensity profile of the emitted light comprising an intensity of the emitted light as a function of axial position;
- (c) determining a first intensity boundary of the intensity profile and a second intensity boundary of the intensity profile;
- and
- (d) determining a thickness of a layer of the glass article based on an axial distance between the first intensity boundary and the second intensity boundary,
- wherein the method further comprises determining a thickness profile of the layer of the glass article by repeating steps (b) through (d) at a plurality of different transverse positions along the edge of the glass article, the thickness profile comprising the thickness of the layer of the glass article as a function of transverse position along the edge of the glass article.
A method comprising:
- (a) introducing light into a glass article such that at least a portion of the introduced light is emitted from an edge of the glass article;
- (b) detecting the light emitted from the edge of the glass article, an intensity profile of the emitted light comprising an intensity of the emitted light as a function of axial position;
- (c) determining an axial position of an intensity boundary of the intensity profile;
- (d) repeating steps (b) and (c) at a plurality of different transverse positions along the edge of the glass article to determine axial positions of a plurality of intensity boundaries corresponding to the different transverse positions;
- and
- (e) determining a layer boundary between adjacent first and second layers of the glass article based on the plurality of intensity boundaries,
- wherein the first layer of the glass article comprises a first glass composition, and the second layer of the glass article comprises a second glass composition different than the first glass composition.
Dependencies are inferred from the claim text.