Light collection systems in electro-optical readers
US5923021A · kind A · utility
36Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1998 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Aug 10, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10702
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical scanner for reading indicia of variable light reflectivity, such as bar code symbols, having a light source for producing a light beam for scanning a target; a sensor for collecting the reflected light from the target; and various light collection systems, including a louver formed from an array of thin slats positioned adjacent to the sensor so that light directed along substantially only one angle reaches the sensor, as well as imaging/diffusing optical systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.