Method and apparatus for detecting the presence of a moulding in an open blister package based on sensed temperature differences
US6471396B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Nov 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/9508
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method and a device for registering the presence of an ophthalmic moulding consisting of a biocompatible polymeric material, especially an ophthalmic lens, particularly a contact lens, in a package. The invention solves the problem through the use of an IR camera. Packages containing a moulding, especially a contact lens, have a change in their temperature distribution compared with a package without a contact lens. By evaluating the temperature difference, it is possible to determine whether or not there is a contact lens in a package. In particular, by using the detecting method according to the invention, one can determine whether there is a contact lens in the package directly after the filling procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.