Apparatus for the illumination of a region of a bottle or the like to be inspected such that bottle acts as waveguide and secondary light source
US5175428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1990 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Nov 30, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0081
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The apparatus is used for testing the surface structure of hollow, cylindrical regions of transparent, hollow bodies (e.g. bottles) moved along a track. It comprises an illuminating device (10), a conveyor (14) by means of which the hollow bodies (34) are moved through an inspection region, and an imaging device (12). The illuminating device (10) has several light sources (26) which are arranged so that, in every position within the inspection region (9), the hollow bodies (34) receive light at an angle of incidence such that the hollow bodies (34) act as wave guides and appear as secondary light sources with respect to the imaging device (12), so that the imaging device (12) yields a high-contrast image of the surface structures of the hollow bodies. The device is principally used for the testing of recycled bottles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.