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

Patent metadata

Field	Value
Publication number	US-10399882-B2
Application number	US-201715698162-A
Country	US
Kind code	B2
Filing date	Sep 7, 2017
Priority date	Jun 15, 2016
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

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 that may form crystals;
a hot stage heated by heating elements at least partially surrounding the glass;
a light source that provides light at a wavelength λ that interacts with the crystals that may form in the glass;
a wavelength separator that separates out a spectrum δ of light from the glass 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 in the hot stage, and that collect and/or guide light directed from the glass in the hot stage and direct the light directed from the glass 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 in the hot stage is at a temperature within 400° C. of a melting temperature of the glass.

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 2 , wherein the wavelength λ of the light is about 532 nm, about 193 nm, about 266 nm, about 488 nm, or about 514 nm.

4. 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.

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.

7. A system for glass material processing, comprising:
glass material comprising glass that may form crystals;
a hot stage heated by heating elements at least partially surrounding the glass, wherein at least some of the glass is at a temperature of at least 500° C.;
a light source that provides light at a wavelength λ that interacts with the crystals that may be form in the glass, 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 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 in the hot stage, and that collect and/or guide light directed from the glass in the hot stage and direct the light directed from the glass 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 in the hot stage is at a temperature within 400° C. of a melting temperature of the glass.

8. The system of claim 7 , wherein the wavelength λ of the light is in the near ultraviolet or visible range of the electromagnetic spectrum.

9. The system of claim 8 , wherein the wavelength λ of the light is about 532 nm, about 193 nm, about 266 nm, about 488 nm, or about 514 nm.

10. The system of claim 8 , 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.

11. The system of claim 10 , wherein the wavelength λ of the light is in the near ultraviolet or visible range of the electromagnetic spectrum.

12. The system of claim 11 , wherein the wavelength λ of the light is about 532 nm, about 193 nm, about 266 nm, about 488 nm, or about 514 nm.

13. A system for glass material processing, comprising:
glass material comprising glass that may form crystals;
a hot stage heated by heating elements at least partially surrounding the glass;
a light source that provides light at a wavelength λ that interacts with the crystals that may form in the glass;
a wavelength separator that separates out a spectrum δ of light from the glass 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 in the hot stage, and that collect and/or guide light directed from the glass in the hot stage and direct the light directed from the glass 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 in the hot stage is at a temperature no more than 1000° C. greater than a melting temperature of the glass.

14. The system of claim 13 , wherein the wavelength λ of the light is in the near ultraviolet or visible range of the electromagnetic spectrum.

15. The system of claim 14 , wherein the wavelength λ of the light is about 532 nm, about 193 nm, about 266 nm, about 488 nm, or about 514 nm.

16. The system of claim 14 , 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.

17. The system of claim 16 , wherein the wavelength λ of the light is in the near ultraviolet or visible range of the electromagnetic spectrum.

18. The system of claim 17 , 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

• G01N2021/4735

  Solid samples, e.g. paper, glass · CPC title

• G01N21/65

  Raman scattering · CPC title

• C03C23/0025

  by a laser beam · CPC title