Light beam scanning recording method
US4806946A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Dec 23, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4056
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a light beam scanning recording method, a continuous tone image is recorded on a photosensitive material by scanning a light beam deflected by a rotating polygon mirror on the photosensitive material and carrying out pulse number modulation or pulse width modulation of the light beam in accordance with image signals. A single picture element string is scanned by the light beam a plural number of times which is equal to integral multiples of the number of mirror surfaces of the rotating polygon mirror. The number of pulses per picture element or the pulse width per picture element is distributed among the plural number of times of scanning so that the total number of pulses per picture element or the total pulse width per picture element in the plural number of times of scanning coincides with a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.