Self-resonant galvanometer scanning system with evacuated chamber
US4992655A · kind A · utility
6Cited by
7References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Nov 2, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04794
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A very stable deflection system usable with a beam of radiant energy incorporates a self-resonant scanning galvanometer located within an evacuated chamber. The chamber has a hermetic radiant energy transmissive window. An exterior laser source provides a beam of monochromatic light which is directed onto the mirror of the galvanometer. Repetitive deflection of the galvanometer mirror at a predetermined frequency results in the beam being projected onto a target so as to form a very stable and repeatable scanning line. Movement of the target provides a multi-line raster on which an image can be formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.