Film scanner with in-line dual scanning gates
US5461492A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1994 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | Feb 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0416
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A film scanner for digitizing film image frames having dual, in-line negative filmstrip and slide scanning gates on a scanning gate frame movable to position the selected scanning gate in a scanning station. The film scanner includes a film scanning station, an insertion slot for receiving the filmstrip, a filmstrip pre-positioning station a filmstrip for scanning while a previous filmstrip is being scanned, an ejection slot, and a diverter for diverting the scanned filmstrip out the ejection slot and allowing the advancement of the pre-positioned filmstrip into the filmstrip scanning gate. The pre-positioned filmstrip is advanced in a forward direction through the diverter and filmstrip scanning gate, as the scanning station performs a low resolution pre-scanning of the image frames. Then the pre-scanned filmstrip is advanced in the reverse direction into the filmstrip scanning gate, clamped in place, and the filmstrip scanning gate is translated more slowly through the scanning station which performs a high resolution main-scanning of the image frames. The scanning gate frame is also movable by the carriage drive motor to position and translate the slide scanning gate through the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.