Electro-acoustic devices for analysing optical image
US4084192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1976 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | Sep 8, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F99/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reading device for analysing an optical image in one dimension and for converting it into an electrical signal the amplitude of which characterizes the light intensity of the elemental zones analysed by a semiconductive substrate and scanned by the interaction of acoustic surface waves on a piezoelectric substrate, which comprises, for increasing its sensitivity, discrete junctions on the surface of the photosensitive semiconductive substrate "scanned" by the surface waves arising out of the non-linear interaction, and wherein the output signal is collected between an electrode disposed on the other surface of the semiconductive substrate and an electrode of the piezoelectric substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.