Apparatus for the three-dimensional inspection of hollow bodies with plural mirror for generating plural partial images
US5136157A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Nov 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/06126
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A conveyor (12) moves the hollow bodies (18) over a circular path through an inspection region (20) in which the hollow bodies (18) are homogeneously illuminated by an illumination device (16). The light issuing from the hollow bodies (18) passes via a group (34) of four mirrors (34a-34d) and a deflecting mirror (36) to a matrix camera or line scanning camera (30). The mirrors (34a-32d) are plane mirrors which are inclined at an angle in relation to one another. The hollow bodies (18) execute one complete revolution about their longitudinal axis while passing through the inspection region (20). Therefore, the group (34) of four mirrors views a quarter of the circumference of the hollow bodies each time in succession. The inspection apparatus is particularly suitable for inspecting the threaded region of bottles and has the advantage that is does not need any moving parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.