Film scanner with in-line dual scanning gates

Details Film scanner with in-line dual scanning gates Film scanner with in-line dual scanning gates

1994-02-16

1995-10-24

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 358496, 358498, 358506, 353 95, 355 75, H04N 104

Patent

active

054614929

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 scanning station during pre-scan and main-scan operations. Jaws of the slide scanning gate receive slide mounts varying in width and thickness and to center the slide film image frame in the film scanning plane.

REFERENCES:
patent: 3644038 (1972-02-01), Uddgren
patent: 4858003 (1989-08-01), Wirt et al.
patent: 5093734 (1992-03-01), Gerlach
patent: 5111241 (1992-05-01), Kralles
patent: 5155596 (1992-10-01), Kurtz et al.
patent: 5162840 (1992-11-01), Benker et al.

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