Fixture and method for optical alignment in a system for measuring a surface in contoured glass sheets
US11867630B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2022 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Aug 9, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/06113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical inspection system is provided with a fixture to support a glass sheet, with the fixture having an optical fiducial. An ultraviolet laser and associated optics form a planar laser sheet that intersects a surface of the glass sheet causing the surface to fluoresce and form a visible wavelength line thereon. A camera has an image sensor for detecting the optical fiducial and the visible wavelength line across at least a portion of a width of the sheet. A control system is configured to (i) image the optical fiducial on the fixture, (ii) define an optical fiducial coordinate system from the imaged optical fiducial, (ii) receive a mathematical model of the glass sheet in a model coordinate system, and (iii) relate the optical fiducial coordinate system to the model coordinate system via at least one transformation. A method of using a non-contact optical inspection system is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.