Telecopying process employing a cell having a smectic liquid crystal and a transmitter-receiver telecopier employing said process
US4310858A · kind A · utility
9Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1979 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Aug 1, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/02427
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A telecopying process and a transmitter-receiver telecopier employing this process. A cell having a smectic liquid crystal is used for recording by thermo-optically forming an intermediate image of a linear element (column portion or a whole line) of the transmitted document, which image is thereafter projected onto a photosensitive surface. The same optical system permits, when transmitting, the reading of this linear element by a mosaic of detectors and, when receiving, the projection onto the photosensitive surface of the intermediate image recorded in the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.