Device and apparatus for high speed tracking in a raster output scanner
US5363126A · kind A · utility
14Cited by
16References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1992 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Sep 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04798
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical element for laser beam deflection in a raster output scanner (ROS) of an electrophotographic printer. The optical element includes a chamber containing a ferroelectric liquid crystal material having a variable index of refraction as a function of voltage applied thereacross. The ROS includes a control system coupled to a voltage source for applying a voltage across the optical element to control the variable index thereof in conjunction with the rotation of the polygon, facet alignment errors and/or belt motion errors to provide high speed tracking of a light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.