Inspection and/or web observation apparatus, use of an arrangement as a background panel or transmitted-light transmitter in the inspection and/or web observation apparatus, and method for operating the inspection and/or web observation
US10809204B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 2017 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Jul 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30164
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for inspecting or observing a material web, a process of inspecting the material web and a method for operating the apparatus for inspecting or observing the material web are provided. The apparatus has a guiding device through which the material web is guided and a camera including a field of view and configured to record an image of the front side within the field of view. An incident light transmitter is configured to illuminate the front side with incident light, and a background panel is arranged on the rear side of the material web within the field of view. The background panel includes a diffuser plate, a light guide plate, a reflecting surface, and a light source configured to couple light into the light guide plate which is configured to uncouple the light to illuminate the rear side of the material web with transmitted light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.