Ultraviolet light-based inspection for detecting coating defects in manufactured webs using fluorescing agents
US12092585B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2020 |
| Grant date | Sep 17, 2024 |
| Priority date | — |
| Expiry date | Nov 4, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8854
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques are described for automatically detecting defects in webs using ultraviolet light to excite fluorescing agents in various layers of the web. In one example. a system for detecting defects in the web includes an inspection device and a processing unit. The inspection device includes a lighting unit, a filter, and an image capture device. The lighting unit is configured to emit ultraviolet light having a first wavelength to the web, the web including a fluorescing agent configured to emit light having a second wavelength upon excitation by the ultraviolet light. The image capture device is configured to capture one or more images of the light having the second wavelength after the light has passed through the filter. The processing unit is configured to determine whether the web includes a defect based on the one or more images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.