Method and system for selective removal of material coating from a substrate using a flashlamp
US5281798A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1991 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Dec 24, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/51
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Pulsed light sources, such as a flashlamp or laser, remove coatings from substrates via the ablation method. A photodetector circuit, sensing reflected light from the surface being ablated, provides a feedback signal that indicates the reflected color intensity of the surface being ablated. The boundary between the coatings or substrate surfaces is distinguished by a change in color intensity between an upper coating and an undercoating, e.g., between a topcoat of paint and a primer coat of paint, or between a coating and the substrate surface itself. The color intensity determination thus provides a measure relative to when one coating has been removed and another coating remains. The photodetector circuit is also useful for providing feedback information relative to the quality of a stripped work surface for quality control or other purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.