Portable scanners capable of scanning both opaque and transparent materials
US6054707A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1998 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jul 31, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0418
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Scanners disclosed in the present invention uses a dual-illumination system comprising a front illumination source and a back illumination source. The front illumination source is controlled to illuminate a scanning object when the scanning object is opaque. The back illumination illuminates a scanning object when the scanning object is transparent. An optical system collects lights reflected from the opaque scanning object illuminate by the front illumination source or transmitted through the transparent scanning object illuminated by the back illumination source and focuses the lights upon an image sensor, thereby an image of either the opaque scanning object or the transparent scanning object can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.