Method and system for detecting inclusions in float glass based on spectral reflectance analysis
AssigneeGuardian Glass, LLC
InventorOkan Agbuga
Life of this patent
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Abstract
A method and/or system is provided for detecting and/or identifying inclusions (e.g., nickel sulfide based inclusions/defects) in glass such as soda-lime-silica based float glass. In certain example instances, during and/or after the glass-making process, following the stage in the float process where the glass sheet is formed and floated on a molten material (e.g., tin bath) and cooled or allowed to cool such as via an annealing lehr, energy such as infrared (IR) energy is directed at the resulting glass and reflectance at various wavelengths is analyzed to detect inclusions.
Claims27
A method of detecting an inclusion in glass, the glass including a base glass composition comprising:
- Ingredient
- wt. %
- SiO2
- 67-75%
- Na2O
- 10-20%
- CaO
- 5-15%
- Al2O3
- 0-7%
- K2O
- 0-7%
- the method comprising:
- directing energy from at least one source toward the glass;
- and
- determining whether an inclusion is present in the glass based on at least an analysis of reflectance values from the glass at different wavelengths.
A method of detecting an inclusion in glass, the method comprising:
- directing energy from at least one source toward the glass which comprises a base glass composition comprising:
- Ingredient
- wt. %
- SiO2
- 67-75%
- Na2O
- 10-20%
- CaO
- 5-15%
- Al2O3
- 0-7%
- K2O
- 0-7%;
- and
- determining whether an inclusion comprising nickel sulfide is present in the glass based on at least an analysis of reflectance values from the glass at different infrared (IR) wavelengths.
A system for detecting an inclusion in glass, the glass including a base glass composition comprising:
- Ingredient
- wt. %
- SiO2
- 67-75%
- Na2O
- 10-20%
- CaO
- 5-15%
- Al2O3
- 0-7%
- K2O
- 0-7%
- the system comprising:
- at least one source for directing energy toward the glass;
- and
- a processor configured to determine whether an inclusion is present in the glass based on at least an analysis of spectral reflectance and/or luminescence values from the glass at different wavelengths.
A method of detecting an inclusion in glass, the method comprising:
- directing energy from at least one source toward the glass which comprises a base glass composition comprising:
- Ingredient
- wt. %
- SiO2
- 67-75%
- Na2O
- 10-20%
- CaO
- 5-15%
- Al2O3
- 0-7%
- K2O
- 0-7%;
- and
- determining whether an inclusion is present in the glass based on at least an analysis of reflectance and/or luminescence values from the glass at various wavelengths.
Dependencies are inferred from the claim text.