Bar code evaluation system architectures and methods of calibration
US5939697A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1996 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10851
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An evaluation system having one or more scanner units providing arrangements to enable the computer controlled, rapid setup and calibration of each included scanner unit to be employed for evaluation. The calibration is effected with specific settings established using stored calibration parameter groups. The calibration parameter groups, which are previously determined using special calibration targets, are stored and available for later recall and use, as needed. The evaluation system arrangements provide for slidably mounted scanner units to enable the distance between the scanner unit and a target indicia to be adjusted to a known distance to produce a selected spot size for the subsequent evaluations. A computing unit is provided having a memory to store the plurality of calibration parameter groups, with each stored calibration parameter group available to provide parameter values to be applied for use with the included scanner units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.