Method and system for inspecting packages
US5943436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1996 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/9508
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for verifying the presence of a lens in a transparent package. The method comprises the steps of moving the package into an inspection position, and conducting a light beam through the package and onto an image plane to form an image of the package on the image plane. The method further comprises the steps of generating a set of signals representing the image on the image plane, and analyzing those signals to determine whether a lens is present in the package. This analyzing step, in turn, includes the steps of searching the package image for images of discrete objects; and for each object image found in the package image, identifying values for a plurality of parameters, and analyzing those identified values according to a predetermined procedure to identify the object as a lens or as not a lens. A lens present signal is generated if one object image found in the package image is identified as a lens; and a lens missing signal is generated if no object images are found in the package image, or if all object images found in the package image are identified as not lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.