Process and arrangement for the inspection of translucent articles
US5528026A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1994 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Sep 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/909
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to the process of the invention, optical inspection of a translucent article, in particular optical inspection of a concave bottom of a container, in which the article is positioned between a radiation source and an image recording apparatus and an image of the article is recorded and processed, is improved by placing at least one optical correction element in the paths of rays between the radiation source and the image recording apparatus to correct ray paths causing undesired dark or black spots on the image, so that such dark or black spots are prevented or brightened in order that an adequate image for satisfactory image-analysis is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.