Optical code readers with holographic optical elements
US6651886B2 · kind B2 · utility
36Cited by
29References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jun 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10663
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Holographic optical elements are configured and deployed in optical imagers and scanners to produce optical modification of output laser beams and light received and detected by the system. In some preferred embodiments electrically switchable holographic optical elements (ESHOEs) are employed for beam tilting, for varying spot size and shape for modifying system focal distance and field of view, for changing laser aiming patterns and/or for color imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.