X-ray tube
First Claim
Patent Images
1. An X-ray tube comprising:
- a stem pin;
a housing;
a grid electrode structure for performing a grid electrode function, wherein at least a part of said grid electrode structure is fixed to said stem pin;
an electron gun provided proximal to said grid electrode structure in said housing;
a focusing electrode integrally formed with said housing;
a cylindrical member having a first distal end abutting against said focusing electrode and a second distal end abutting against said grid electrode structure, said cylindrical member having a hollow portion and being configured to allow electrons directed from said grid electrode structure toward said focusing electrode to pass through the hollow portion of said cylindrical member;
a stem coupled to said electron gun through at least one said stem pin, said housing being sealed by said stem; and
an anode target to generate X-rays.
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Abstract
An X-ray tube 1 includes spacer 8 which is cylindrical so it does not block electrons 80 directed from a grid electrode 72 toward a focusing electrode 25, and which has one end 8b fixed to the grid electrode 72 and the other end 8c abutting against the focusing electrode 25. The distance between the grid electrode 72 and focusing electrode 25 is set to a predetermined distance by the spacer 8.
63 Citations
8 Claims
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1. An X-ray tube comprising:
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a stem pin;
a housing;
a grid electrode structure for performing a grid electrode function, wherein at least a part of said grid electrode structure is fixed to said stem pin;
an electron gun provided proximal to said grid electrode structure in said housing;
a focusing electrode integrally formed with said housing;
a cylindrical member having a first distal end abutting against said focusing electrode and a second distal end abutting against said grid electrode structure, said cylindrical member having a hollow portion and being configured to allow electrons directed from said grid electrode structure toward said focusing electrode to pass through the hollow portion of said cylindrical member;
a stem coupled to said electron gun through at least one said stem pin, said housing being sealed by said stem; and
an anode target to generate X-rays.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification