公开(公告)号：US06781300B1

公开(公告)日：2004-08-24

申请号：US09369522

申请日：1999-08-06

Applicant: Ralf Klaus Edinger

Inventor： Ralf Klaus Edinger

IPC: H01J6304

CPC classification number: H01J3/024 ,  H01J1/135

Abstract: This invention relates to electron guns, each comprising of an indirectly heated cathode, a gate electrode and an anode, for generating electron beams of various shapes and power that are preferably used to machine workpieces. Thus cathodes can be used with various geometric designs. Thus cathodes of the most varied geometrical shapes can be used. Along with band cathodes and band cathodes with bodies attached to them, massive cathodes such as bolt-type cathodes can also be applied. Using massive bodies results in a longer service life of the cathode as compared to band cathodes. Another benefit is that the service life of the heat source for the cathode is identical to the service life of the laser used. It is particularly advantageous to place the laser outside the housing, which ensures a very long service life of this source of heat. At the same time, the solution according to the invention is distinguished by an indirect temperature measurement of the cathode. This allows the radiation property to be controlled and improved. There is thus a type of compensation for the effects of the craters that may occur on the emission surface of the cathode.

Abstract translation: 本发明涉及电子枪，每个电子枪包括间接加热的阴极，栅电极和阳极，用于产生用于加工工件的各种形状和功率的电子束。 因此，阴极可以用于各种几何设计。 因此，可以使用最差的几何形状的阴极。 随着具有连接到它们的体的带阴极和带阴极，也可以应用诸如螺栓型阴极的大量阴极。 与带阴极相比，使用大块体导致阴极的使用寿命更长。 另一个好处是阴极热源的使用寿命与使用的激光器的使用寿命相同。 将激光放置在壳体外部是特别有利的，这确保了该热源的非常长的使用寿命。 同时，根据本发明的解决方案通过阴极的间接温度测量来区分。 这允许控制和改善辐射特性。 因此，对于可能在阴极的发射表面上可能发生的凹坑的影响，存在一种类型的补偿。