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X-ray tube structurally supported planar emitter

An emitter, electron emitter technology, applied in the directions of X-ray tubes, X-ray tube electrodes, X-ray tube parts, etc., can solve problems such as difficulty in generating X-ray images

Active Publication Date: 2018-11-09
VAREX IMAGING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the focal spot is unacceptable, it may be difficult to produce useful X-ray images

Method used

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  • X-ray tube structurally supported planar emitter
  • X-ray tube structurally supported planar emitter
  • X-ray tube structurally supported planar emitter

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Embodiment Construction

[0032] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols generally identify similar components, unless context dictates otherwise. The exemplary embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that the aspects of the present disclosure, as generally described herein and illustrated in the accompanying drawings, can be arranged, substituted, combined, separated and designed in a wide variety of different configurations, all of which are in explicitly considered in this paper.

[0033] I. General overview of exemplary X-ray tubes

[0034] Embodiments of the present technology relate to X-ray tubes of the type having a vacuum envelope in which a cathode ...

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PUM

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Abstract

A cathode head (15) can include: an insulating block (226) on a base (216); an electron emitter (222) with a planar emitter surface (234) formed by a plurality of elongate rungs (235) connected together through a plurality of turns (236) from a first emitter end (233 a) to a second emitter end (233b) so as to form a serpentine emitter pattern (230); a plurality of elongate legs (240) extending from the plurality of turns (236) at an angle relative to the planar emitter surface (234), each of the legs (240) being coupled with the insulating block (226); an elongate first lead leg (231a) at thefirst emitter end (233a) and an elongate second lead leg (231b) at the second emitter end (233b); a first electrical lead (227a) and a second electrical lead (227b) extending from the base (216); anda first electrical coupler (224a) coupling the first electrical lead (227a) to the first lead leg (231a) and a second electrical coupler (224b) coupling the second electrical lead (227b) to the secondlead leg (23lb).

Description

[0001] cross reference [0002] This application claims priority to US Application No. 15 / 074,834, filed March 18, 2016, which is specifically incorporated herein by reference. Background technique [0003] X-ray tubes are used in a variety of industrial and medical applications. For example, X-ray tubes are used in medical diagnostic examinations, therapeutic radiology, semiconductor manufacturing, and materials analysis. Regardless of the application in question, most x-ray tubes operate in a similar manner. In an X-ray tube, X-rays, which are high-frequency electromagnetic radiation, are generated by applying current to a cathode so that electrons are emitted from the cathode by thermionic emission. The electrons are accelerated towards the anode, where they impinge. The distance between cathode and anode is generally referred to as the A-C spacing or throw distance. When electrons impinge on the anode, the electrons may collide with the anode to generate X-rays. The ...

Claims

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Application Information

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IPC IPC(8): H01J35/06
CPCH01J35/064
Inventor G·F·维沙普J·R·博野M·C·格林D·H·亨伯
Owner VAREX IMAGING CORP