Adapter for scanning transparencies with a reflective document scanner
US5463217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Nov 22, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0418
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A completely passive adapter for scanning transparent images in a reflective scanner. Mirrors are used to capture light from a lamp that is internal to the scanner and to reflect that light thought a transparent image along the light path required by internal scanner optics. For larger images, a lens is added to capture additional light. Different embodiments of the adapter accommodate variation in angles of optical paths and offset between the light source path and the light detection path. Embodiments are provided having two tilted mirrors, two mirrors plus an optical wedge, four mirrors, and seven mirrors. An optional graduated density optical filter may be added to compensate for nonuniform illumination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.