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US 2020/0049619 A1Published application
Polarized light filter vision system to detect level of temper in glass
AssigneeGM Global Technology Operations LLC
InventorsJerod F. Long, Robert Denk, Tyler Boscoe
Life of this patent
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Abstract
A method to inspect for proper tempering of a piece of glass includes forming a piece of tempered glass and exposing the piece of tempered glass to a polarized light source. A vision system is used to inspect a temper pattern of the piece of tempered glass being exposed to the polarized light source and then the temper pattern of the piece of tempered glass is compared to a master temper pattern to determine if the inspected temper pattern is acceptable.
Claims11
A method to inspect the level of temper of a piece of glass comprising:
- forming a piece of tempered glass;
- exposing the piece of tempered glass to a polarized light source;
- using a vision system to inspect a temper pattern of the piece of tempered glass being exposed to the polarized light source;
- and
- comparing the temper pattern of the piece of tempered glass with a master temper pattern to determine if the inspected temper pattern is acceptable.
2 more elements
A system for detecting a level of temper in glass comprising:
- a light source configured to illuminate a piece of tempered glass;
- a light filter configured to polarize the light from the light source illuminating the piece of tempered glass;
- a camera configured to capture an image of the piece of tempered glass being illuminated by the light source;
- and
- an image comparison device operative to compare the captured image to a master temper pattern to determine if the level of temper in the piece of tempered glass is acceptable.
2 more elements
Dependencies are inferred from the claim text.