Acoustro-electric scanner by phonon echo phenomenon
US4084189A · kind A · utility
2Cited by
4References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1975 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | Dec 29, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F99/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin film optical scanner using phonon echoes. A piezoelectric (an insulator or a semiconductor) crystal has deposited thereon a photoconductor. An acoustic transducer propagates a broad strain wave pulse guided in or on the crystal. A relatively shorter electric field pulse is coupled to the piezoelectric crystal through the photoconductor which has an optical signal focused thereon. The interaction of electric field and strain wave produce a backward travelling acoustic wave which is modulated by the optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.