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    • 8. 发明申请
    • ELECTRON GUN
    • 电子枪
    • US20120062094A1
    • 2012-03-15
    • US13322025
    • 2010-04-14
    • Mikio IchihashiTadashi OnishiShunichi WatanabeKeiji Tamura
    • Mikio IchihashiTadashi OnishiShunichi WatanabeKeiji Tamura
    • H01J29/48H01J29/00
    • H01J37/063H01J37/073H01J37/141H01J2237/06316H01J2237/06341H01J2237/065H01J2237/26
    • The present invention has an object to provide a cold cathode field-emission electron gun with low aberration, to thereby provide a high-brightness electron gun even in the case of a large current. The present invention provides a field-emission electron gun which extracts an electron beam from a cathode and converges the extracted electron beam, the field-emission electron gun including: a magnetic field lens which is provided such that the cathode is disposed inside of a magnetic field of the lens; and an extraction electrode for extracting electrons from the cathode, the extraction electrode being formed into a cylindrical shape without an aperture structure. The present invention can provide an electron gun having a function of converging an electron beam using a magnetic field, the electron gun which is capable of reducing an incidental electrostatic lens action and has small aberration and high brightness.
    • 本发明的目的是提供一种具有低像差的冷阴极场致发射电子枪,从而即使在大电流的情况下也提供高亮度电子枪。 本发明提供一种场致发射电子枪,其从阴极提取电子束并使所提取的电子束会聚,该场发射电子枪包括:磁场透镜,其被设置为使得阴极设置在磁性 镜头领域; 以及用于从阴极提取电子的引出电极,所述引出电极形成为没有孔结构的圆筒形状。 本发明可以提供一种电子枪,其具有使用磁场会聚电子束的功能,该电子枪能够减少偶然的静电透镜作用并且具有小的像差和高亮度。