Method and system utilizing ellipsometry to detect corrosion on glass

A system for detecting corrosion on glass, the system comprising:

• a support for supporting a glass sheet;
• an ellipsometry system for analyzing the glass sheet, the ellipsometry system including at least one radiation source and a processor, wherein the at least one radiation source is configured to direct radiation toward the glass sheet so as to be reflected by the glass sheet;
• wherein the processor of the ellipsometry system is configured to determine whether or not the glass sheet has significant corrosion thereon based on at least the radiation reflected by the glass sheet;
• and
• wherein the processor is further configured to selectively allow the glass sheet to be coated with a low-E coating based at least on whether significant corrosion is detected on the glass sheet.

A method of making a coated glass sheet, the method comprising:

• analyzing an uncoated glass sheet via ellipsometry analysis, including directing radiation toward the uncoated glass sheet so as to be reflected by the uncoated glass sheet;
• determining whether or not the uncoated glass sheet has significant corrosion thereon based on the ellipsometry analysis;
• and
• selectively allowing the uncoated glass sheet to be coated with a low-E coating based at least on whether significant corrosion is determined to be on the uncoated glass sheet.