Electron gun modulated by optoelectronic switching
US5313138A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F30/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electron gun is modulated by an optoelectronic switching device. This switching device comprises a modulated light source and at least one GaAs or Si solid-state optoelectronic switch, this switch being non-conductive when not illuminated and conductive when illuminated by the modulated light source; the device also includes components to transmit the light from the source to the switch(es). In one embodiment, the modulated light source is a laser and in a second embodiment the source is a continuous source externally modulated by a mechanical or electrooptical device. The optoelectronic switching device is connected between a high-voltage source and the cathode of an electron gun, thus modulating the cathode. The invention is particularly applicable to microwave electron tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.