Laser scanning graphic input system
US5525764A · kind A · utility
Inventors
Key dates
| Filing date | Jun 9, 1994 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Jun 9, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0423
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A graphic input system for digitizing the location of an object moving on a planar surface and utilizing two or more primary laser light beams, the output beam of each scanning the planar surface through interposed controllably pivotally mounted beam deflecting scan mirrors. A stylus is moved over the planar surface in response to the position of the deflected position of the scanning beam. A signal generating beam detector positioned adjacent the planar surface delivers signals to a logical circuit to create the instantaneous value of a position voltage signal which is proportional to the tangent of the scan angle of each of the controllably deflected laser beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.