Claims
- 1. An x-ray tube comprising:an electron gun for emitting an electron; a target for receiving said electron emitted from said electron gun at a front end face and generating an x-ray; an x-ray emitting window, disposed in front of said front end face of said target, for emitting said x-ray; and a hood electrode, formed as a tubular body attached to a tip portion of said target, having a peripheral face provided with an electron passage port for passing said electron therethrough, said electron passage port widening more on a side opposite from said x-ray emitting window than on said x-ray emitting window side with respect to a position intersecting an extension of said electron gun in an electron emitting direction.
- 2. An x-ray tube according to claim 1, wherein, of said tip portion of said target, a part exposed from said electron passage port is cut off.
- 3. An x-ray tube according to claim 1, wherein said electron is made incident onto a center axis of said front end face of said target.
- 4. An x-ray tube comprising:an electron gun for emitting an electron; a target for receiving said electron emitted from said electron gun at a front end face and generating an x-ray; an x-ray emitting window, disposed in front of said front end face of said target t for emitting said x-ray; and a hood electrode formed as an annular body attached to a tip portion of said target, said hood electrode being disposed closer to said x-ray emitting window than is a position where said electron is made incident on said front end face.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10-025885 |
Feb 1998 |
JP |
|
RELATED APPLICATION
The present application is a continuation-in-part application of PCT application No. PCT/JP99/00507 filed on Feb. 5, 1999, designating U.S.A. and now pending.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5077771 |
Skillicorn et al. |
Dec 1991 |
A |
5563923 |
Okada et al. |
Oct 1996 |
A |
Foreign Referenced Citations (3)
Number |
Date |
Country |
1 220 423 |
Jan 1971 |
GB |
7-296751 |
Nov 1995 |
JP |
WO 9742646 |
Nov 1997 |
WO |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
PCT/JJ99/00507 |
Feb 1999 |
US |
Child |
09/633159 |
|
US |