System for driving and controlling the motion of an oscillatory electromechanical system especially suitable for use in an optical scanner
US5796222A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Aug 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2207/1016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computerized control system for driving an rotor which can carry a laser or a beam deflecting mirror and is actuated by a coil thereon electromagnetically coupled to a fixed magnet or a stepper motor coil. The rotor can be part of an electromechanical oscillatory system supported by flexures or the stepper motor can be electrically biased to produce, electrodynamically a restoring force. The back EMF of the coil is sensed, translated into successive digital signals which are processed in accordance with programs in firmware of the computer to generate driving pulses which are applied to the coil to obtain desired displacement motion of oscillation suitable for scanning the beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.