High resolution two-directional optical scanner
US5191466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1991 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Aug 26, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high resolution two-directional optical scanner, comprising a source of very high frequency light pulses, a first acousto-optic cell for diffracting the light pulses towards an image plane so as to form on a predetermined area thereof a line of pixels corresponding to the data, and a second acousto-optic cell intermediate the first acousto-optic cell and the image plane for intercepting the light pulses diffracted by the first acousto-optic cell and diffracting them towards the image plane in a second direction perpendicular to the line of pixels at an angle dependent on a scanning signal fed to the second acousto-optic cell. The invention is particularly suited for use with flat bed plotters and reduces the need to transport the plotter bed mechanically in order to achieve scanning normal to the direction of each complete scan line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.