Method, device and inspection line for visualizing the flatness of a surface of a container ring
US10184900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2015 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Jan 7, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/061
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of visualizing the planeness of a ring surface of a container includes lighting the ring surface from above using a peripheral incident light beam having radial rays with specular reflection on the ring surface. An optical system is used to form a plane image of the ring surface on a sensor, with an optical geometrical transformation that converts a real height difference (dZ) into an image radial offset (dR) on the image, and the image radial offset (dR) corresponding to a unit real height difference (dZ) is greater than the image radial offset corresponding to a real radial offset of the same dimension. A device and an installation implementing the visualizing method is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.