Device for the two-dimensional reading of optical images, using elastic surface waves
US4069507A · kind A · utility
8Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Sep 21, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for reading two-dimensional optical images. It comprises a piezoelectric substrate on which two transducers transmit elastic waves in two separate directions, and a semiconductive and photoconductive layer arranged near the surface of the substrate, in which a nonlinear interaction occurs opposite the point where the two said directions converge. This point of convergence forms a reading point of the image which is projected onto the photoconductor, this point moving as a function of time along a straight line which forms an analysis line of said image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.