Document video digitizer
US4424535A · kind A · utility
14Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1982 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Mar 19, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/02815
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high speed document manipulator providing high resolution digital video-signal output. A document transport moves the documents at a high speed for entrance, flip-over and exit, and at about one-fifth that speed for video scanning while moving for producing the video signal. Servo control provides a forward and back initial motion to obtain top to bottom scanning. The servo circuit is electrically protected. The video sensor is firmly coupled to the optical system. An elongated light source, elliptical reflector and "cool" mirror provide an elongated transverse illuminated area on the document as it moves through.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.