Laser recorder
US4404570A · kind A · utility
5Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | Feb 3, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laser recorder device in which many levels of half-tone densities are accurately produced with smooth transitions between areas of different densities. An input signal is sampled with a sampling pulse in response to which digital output values of a predetermined function of the input signal are produced. Pulses are applied to a semiconductor laser beam source with the number and frequency of the pulses during a preset application time being determined in accordance with the magnitude of the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.