Method of producing a halftone picture by vibrating light source
US4251625A · kind A · utility
5Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1978 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Oct 26, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spot of light is formed upon a photosensitive material which is moved in a scanning direction, and the spot is vibrated to and fro along a vibration direction at a considerable angle to the scanning direction, and the amplitude of vibration, and the center of the vibration path, are controlled so that the spot exposes areas on the photosensitive material which form half-tone dots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.