Optical system for observation in real time with scanning
US4442455A · kind A · utility
28Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1981 |
| Grant date | Apr 10, 1984 |
| Priority date | — |
| Expiry date | May 5, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical observation system in accordance with the invention comprises illumination means by scanning the object and means for detecting the radiation diffracted by the object. It also comprises an interaction medium in which the wave emerging from the object interferes with a pumping wave in order to induce in it a system of layers diffracting in real time a replica of the object wave propagating in the direction of said wave and a complex conjugate wave propagating in the opposite direction. These waves, which are isomorphic of the object wave help to improve the detection of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.