Optical inspection of container finish dimensional parameters
US5610391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1994 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Aug 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for inspecting external dimensional parameters of a container finish that includes a light source for directing light energy onto the finish of the container and a matrix array sensor disposed to receive an image of the container finish illuminated by the light source. A telecentric lens is positioned to focus onto the matrix array sensor an image of the container finish profile formed by light energy traveling parallel to the telecentric lens axis, such that the finish profile appears as a dark image against a light background at the sensor. The matrix array sensor is scanned at increments of container rotation to determine one or more dimensional parameters of the container finish.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.