Light beam scanning apparatus, and read-out apparatus and recording apparatus using same
US4738501A · kind A · utility
6Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Apr 8, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/302
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light beam scanning system comprises a wave guide formed of a material allowing propagation of surface acoustic waves therethrough, and a means for generating the surface acoustic waves in the wave guide so that they advance along an optical path of light incident upon the wave guide, and a drive circuit for periodically applying a pulsewise voltage to the surface acoustic wave generating means. The wave guided inside of the wave guide is emitted out of the wave guide at the section where the surface acoustic waves are present by a coupling action of a grating generated by the surface acoustic waves with the guided wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.