JPWO2020070673A5

JPWO2020070673A5 -

Info

Publication number: JPWO2020070673A5
Application number: JP2021518092A
Authority: JP
Publication date: 2022-10-12
Anticipated expiration: 2039-10-02

Claims

A method of detecting inclusions in glass, said glass comprising a base glass composition comprising:

the method comprising:
directing energy from at least one light source toward the glass;
determining the presence or absence of inclusions in the glass based at least on analysis of reflectance values from the glass at different wavelengths.

The at least one light source emits energy, including infrared (IR) energy, toward the glass, and the determining the presence or absence of inclusions in the glass reflects reflections from the glass at different IR wavelengths. 2. The method of claim 1, based on at least analysis of rate values.

3. The method of claim 1 or 2, wherein said determining the presence or absence of inclusions in said glass is based on at least analysis of reflectance values from said glass at different IR wavelengths within the range of 800-2,000 nm. Method.

4. Any of claims 1-3, wherein said determining the presence or absence of inclusions in said glass is based on at least analysis of reflectance values from said glass at different IR wavelengths within the range of 900-1,700 nm. The method according to item 1.

5. Any of claims 1-4, wherein said determining the presence or absence of inclusions in said glass is based on at least analysis of reflectance values from said glass at different IR wavelengths within the range of 950-1,250 nm. The method according to item 1.

A method according to any preceding claim, wherein at least one bandpass filter is provided between the glass and a camera for receiving reflected energy from the glass.

The method of any one of claims 1-6, wherein the inclusions comprise nickel sulfide.

8. The method of any one of claims 1-7, further comprising identifying and distinguishing between different inclusions of different materials in the glass based at least on analysis of reflectance values from the glass at different wavelengths. described method.

of claims 1-8, further comprising identifying and distinguishing between nickel sulfide-based inclusions and Cr-based inclusions in the glass based on at least analysis of reflectance values from the glass at different wavelengths. A method according to any one of paragraphs.

of claims 1-9, further comprising identifying and distinguishing between nickel sulfide-based inclusions and iron-based inclusions in the glass based on at least analysis of reflectance values from the glass at different wavelengths. A method according to any one of paragraphs.

11. The method of any one of claims 1-10, further comprising determining whether the glass is acceptable based at least on whether inclusions are detected.

A method according to any one of the preceding claims, wherein the light source is located on and/or within the float line and is arranged after the annealing lehr of the float line.

A method of detecting inclusions in glass, said method comprising:
directing energy from at least one light source toward the glass, the glass comprising:

directing energy comprising a base glass composition comprising
determining the presence or absence of inclusions including nickel sulfide in the glass based at least on analysis of reflectance values from the glass at different infrared (IR) wavelengths.

14. The method of claim 13, wherein said determining the presence or absence of inclusions in said glass is based on at least analysis of reflectance values from said glass at different IR wavelengths within the range of 800-2,000 nm.

15. Any one of claims 13-14, further comprising identifying and distinguishing between different inclusions of different materials in the glass based at least on analysis of reflectance values from the glass at different IR wavelengths. The method described in .

A system for detecting inclusions in glass, said glass comprising a base glass composition comprising:

said system
at least one light source for directing energy toward the glass;
a processor configured to determine the presence or absence of inclusions in the glass based at least on analysis of spectral reflectance and/or luminance values from the glass at different wavelengths.

The at least one light source is configured to emit energy, including infrared (IR) energy, toward the glass, and the processor generates spectral reflectance values and/or spectral reflectance values from the glass at different IR wavelengths. 17. The system of claim 16, wherein the system is configured to determine the presence or absence of inclusions in the glass based at least on analysis of luminance values.

wherein the processor determines the presence or absence of inclusions in the glass based at least on analysis of spectral reflectance and/or luminance values from the glass at different IR wavelengths in the range of 800-2,000 nm. The system according to any one of claims 16-17, wherein the system is configured in

wherein the processor determines the presence or absence of inclusions in the glass based on at least analysis of spectral reflectance and/or luminance values from the glass at different IR wavelengths in the range of 900-1,700 nm. A system according to any one of claims 16 to 18, which is configured in

A system according to any one of claims 16 to 19, wherein at least one bandpass filter is provided between said glass and a camera for receiving reflected energy from said glass.

The system of any one of claims 16-20, wherein said inclusions comprise nickel sulfide.

The processor is further configured to identify and distinguish different inclusions of different materials in the glass based on at least analysis of spectral reflectance values and/or luminance values from the glass at different wavelengths. A system according to any one of claims 16 to 21, comprising:

directing energy comprising a base glass composition comprising
determining the presence or absence of inclusions in the glass based at least on analysis of reflectance and/or luminance values from the glass at different wavelengths.

The at least one light source emits energy, including infrared (IR) energy, toward the glass, and the determining the presence or absence of inclusions in the glass reflects reflections from the glass at different IR wavelengths. 24. The method of claim 23, based on at least analysis of rate values and/or luminance values.

4. The method of claim 1, wherein said determining the presence or absence of inclusions in said glass is based on at least analysis of reflectance and/or luminance values from said glass at various IR wavelengths within the range of 800-2,000 nm. 25. The method according to any one of 23-24.

4. The method of claim 1, wherein said determining the presence or absence of inclusions in said glass is based on at least analysis of reflectance and/or luminance values from said glass at various IR wavelengths within the range of 900-1,700 nm. 26. The method according to any one of 23-25.

24. The light source is positioned below the glass and the camera receiving IR from the glass is positioned above the glass such that the glass is positioned between the light source and the camera. 27. The method of any one of claims 1-26.