Method, system, and equipment for glass material processing as a function of crystal state

Patent metadata

Field	Value
Publication number	US-9783445-B1
Application number	US-201615221060-A
Country	US
Kind code	B1
Filing date	Jul 27, 2016
Priority date	Jun 15, 2016
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A method of processing a glass material includes guiding and/or focusing light from a light source to glass material in a hot stage of a processing system, where the light source provides light at a wavelength λ that interacts with crystals that may be formed in the glass material. The method includes collecting and/or guiding light directed from the glass material in the hot stage to a wavelength separator, and separating the light directed from the glass material to provide a spectrum δ having wavelengths that are within about twenty nanometers of the wavelength λ. The method includes observing with a detector light of the spectrum δ to identify nano-scale shifts in the wavelength λ caused by interaction with crystals, if present, within the glass material in the hot stage of the processing system.

First claim

What is claimed is:

1. A system for glass material processing, comprising:
glass material comprising glass-ceramic having crystals formed therein;
a hot stage heated by heating elements at least partially surrounding the glass-ceramic;
a light source that provides light at a wavelength λ that interacts with the crystals formed in the glass-ceramic;
a wavelength separator that separates out a spectrum δ of light from the glass-ceramic that is within a range of (λ−20 nm) to (λ+20 nm);
a detector that is set to receive light of the spectrum δ of light from the wavelength separator;
optics that guide and/or focus light from the light source to the glass-ceramic in the hot stage, and that collect and/or guide light directed from the glass-ceramic in the hot stage and direct the light directed from the glass-ceramic to the wavelength separator, wherein the optics at least in part prevent the detector from receiving light at the wavelength λ; and
a computerized controller, where the computerized controller is in electronic communication with the heating elements of the hot stage and facilitates a control loop between the heating elements and the detector where the computerized controller changes conditions in the hot stage as a function of information derived from the detector such that at least some of the glass-ceramic is at a temperature no more than 500° C. greater than a glass transition temperature of glass material in the hot stage.

2. The system of claim 1 , wherein the wavelength λ of the light is in the near ultraviolet or visible range of the electromagnetic spectrum.

3. The system of claim 1 , wherein the information comprises crystal state, crystal phase, pre-crystal clustering, crystal structure, location of crystals, size, amount of crystal content, and/or amount of crystals of a certain phase.

4. A system for glass material processing, comprising:
glass material comprising glass-ceramic having crystals formed therein;
a hot stage heated by heating elements at least partially surrounding the glass-ceramic, wherein at least some of the glass-ceramic is at a temperature of at least 500° C.;
a light source that provides light at a wavelength λ that interacts with the crystals formed in the glass-ceramic, wherein at least 95% of light energy from light of the light source is within a 5 nm band around wavelength λ thereby facilitating spectral contributions of shifted spectral bands of crystalline states of the glass material, while mitigating effects on the glass material due to wavelength-induced changes to the glass material caused by the light;
a wavelength separator that separates out a spectrum δ of light from the glass-ceramic that is within a range of (λ−20 nm) to (λ+20 nm);
a detector that is set to receive light of the spectrum δ of light from the wavelength separator;
optics that guide and/or focus light from the light source to the glass-ceramic in the hot stage, and that collect and/or guide light directed from the glass-ceramic in the hot stage and direct the light directed from the glass-ceramic to the wavelength separator, wherein the optics at least in part prevent the detector from receiving light at the wavelength λ, thereby focusing the detector on nano-scale shifted light within the spectrum δ; and
a computerized controller, where the computerized controller is in electronic communication with the heating elements of the hot stage and facilitates a control loop between the heating elements and the detector where the computerized controller changes conditions in the hot stage as a function of information derived from the detector such that at least some of the glass-ceramic is at a temperature no more than 500° C. greater than a glass transition temperature of glass material in the hot stage.

5. The system of claim 4 , wherein the wavelength λ of the light is in the near ultraviolet or visible range of the electromagnetic spectrum.

6. The system of claim 5 , wherein the wavelength λ of the light is about 532 nm, about 193 nm, about 266 nm, about 488 nm, or about 514 nm.

Assignees

• Corning Inc

Inventors

• Cole Sara Ann
• Moore Galan Gregory

Classifications

• G01N2291/0232

  Glass, ceramics, concrete or stone · CPC title

• G01N2223/054

  small angle scatter · CPC title

• C03B5/24 Primary

  Automatically regulating the melting process · CPC title

• G01N21/65

  Raman scattering · CPC title

• C03C23/0005

  by irradiation · CPC title