Method and apparatus for optically reading information attached to a target
US7545722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2004 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Jul 18, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10722
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an apparatus for optically reading out through an imaging optics a first image of information by a photodetector. The information is attached to a target. In the apparatus, a marker beam irradiating unit irradiates on a target a marker beam for indicating a field of view of the photodetector on the target. A first pickup unit causes the photodetector to pick up through the imaging optics a second image of the target based on the field of view while the marker beam is being irradiated on the target by the marker beam irradiating device. A position detecting unit detects a position of the marker beam being irradiated on the target with respect to the field of view based on the picked-up second image. A distance determining unit determines a distance between the apparatus and the target based on the detected position of the marker beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.