Electron tube with electron lens
US5917282A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | May 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F30/2255
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to an electron tube which stabilizes the orbits of electrons accelerated and focused by an electron lens and has a structure for effectively suppressing noise generated due to discharge. This electron tube has, at two ends of an insulating container, a cathode electrode and an anode electrode which constitute the electron lens. Particularly, in the electron tube, one end of the cathode electrode and a photocathode are supported by a conductive member arranged at one end of the insulating container, and the cathode electrode is electrically connected to the photocathode. The cathode electrode partially extends to a stem along the inner wall of the insulating container and is tapered toward the stem so that the distal end portion of the cathode electrode is separated from the inner wall of the insulating container. Therefore, the electron tube realizes, regardless of the size of the insulating container, a structure for preventing the insulating container from being charged and suppressing discharge followed by light emission between the cathode electrode and the insulating container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.