Apparatus and process for focusing a laser beam for reading optical codes
US6325289A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Dec 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10811
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An optical reader which enables optical codes to be read on objects carried on a supporting plane which is provided with a conveyor for moving the objects along a feeding direction. The apparatus comprises a laser beam scanner, a data processing unit connected to the scanner, a first scanner for generating at least a first scan in a first scan plane, so as to measure the instantaneous distance of at least one point on the surface of each of said objects from the scanner, a second scanner for generating a plurality of second scans in a second scan plane, different from the first, so as to read the optical code on the object; and a data processing unit for adjusting the laser beam focal setting according to the distance measured with the first scan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.