Optical wave guide for hand-held scanner
US5586212A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1994 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Jul 6, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2007/10485
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
First and second elongate curved reflecting surfaces positioned in non-parallel, spaced apart relation collect light from an elongate light source and direct it onto a scanning area. One edge of the first curved reflecting surface is positioned adjacent the light source and the opposite edge is positioned adjacent the illuminated scan area so that the first curved reflecting surface extends from about the light source to about the illuminated scan area. The second curved reflecting surface is positioned in opposed spaced-apart non-parallel relation to the first curved reflecting surface such that the distance separating the reflecting surfaces at the light source is less than the distance separating the reflecting surfaces at the end adjacent the illuminated scanning area. An elongate planar reflecting surface is positioned adjacent the second curved reflecting surface so that it is substantially perpendicular to the illuminated scan area. Some of the light rays from the light source are reflected by the first curved reflecting surface and the second curved reflecting surface onto the planar reflecting surface, which in turn reflects the light rays onto the illuminated scan area so…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.