Laser beam facsimile apparatus
US4270149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Aug 20, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/036
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laser beam facsimile apparatus is disclosed. The apparatus utilizes a slit to define the light of a scan line. A laser beam is subjected to amplitude modulation and rapidly deflected toward the slit in a sub-scanning direction by an accousto-optic modulator (AOM) cell. An aperture of the slit is selected to be larger than the diameter of the deflected beam and smaller than the deflection scan in the sub-scanning direction. The light beam passed through the slit is focused on a light-sensitive medium by an optical system, whereby the optical intensity across the entire width of the scan line is constant without losing the sharpness at the edges of the scan line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.