Holographic scanning system
US4224509A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1978 |
| Grant date | Sep 23, 1980 |
| Priority date | — |
| Expiry date | Oct 19, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/106
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A holographic scanning system for scanning a bar code indicia is disclosed in which the light beam of a laser is split into two segments, each directed through a plurality of holograms mounted on a single rotating disk for generating a scanning pattern comprising a plurality of intersecting lines on a target area through which passes a label or object bearing a bar code indicia. The light reflected from the bar code indicia is picked up by an optical detector for use in reading the bar code. A second embodiment includes a rotating disk having mounted thereon two holograms each offset to the other which generates a semicircular scan pattern used in generating an X scan pattern on the target area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.