Abstract:
Structure de guidage de particules chargées en électricité par des électrodes (11) reliées à un manchon (12) par des structures de support (14) qui consistent selon l'invention en des rayons contraints en traction. Un bon centrage des électrodes (11) est maintenu ainsi qu'un faible dégazage.
Abstract:
A planar electron-optical lens is obtained on a semiconductor cathode surface by providing an extra electrode (16) around the gate electrode (14). Dependent on the applied voltage, this configuration operates, for example, as a positive lens which supplies parallel beams without dispersion, suitable for thin, flat display devices. A large positioning tolerance is obtained due to the inherent magnification of the beam diameter in the semiconductor device, while a grid can be dispensed with.
Abstract:
An electron emitting apparatus comprising a plurality of electron emitting devices having an elongated electron emitting pattern which extends in a first direction. The adjacent electron emitting devices are arranged so as to be deviated in a second direction which crosses the first direction.
Abstract:
Elektronenstrahlerzeuger mit einer direkt beheizbaren ersten Katode (2), einer indirekt beheizbaren zweiten Blockkatode (3) und einer Fokussierungselektrode (17). Die Fokussierungselektrode (17) weist eine erste Zentrierfläche (18) auf, und die Blockkatode (3) ist mittels Tragstreben konzentrisch in einem Tragring (19) befestigt, der eine zur ersten Zentrierfläche (18) komplementäre zweite Zentrierfläche aufweist. Dadurch ist die Blockkatode (3) mittels des Tragrings (19) von der Rückseite her in die Fokussierungselektrode eingesetzt, und der Tragring (19) ist mittels eines Verriegelungsringes (24) festgelegt.
Abstract:
A cathode (32), a Wehnelt cylinder (2, 36) and an anode (3, 51) are accommodated in an integrated unit in an electron beam apparatus. Extremely accurate positioning of a Wehnelt bore and an anode bore with respect to one another can be achieved in such an assembled unit which is mounted in the apparatus so as to be removable as one unit An exactly defined distance between the Wehnelt cylinder and the anode can also be adjusted. As a result of the exact mutual positioning, the anode bore can be chosen to be so small that it can also act as a beam aperture so that a smaller electron-optical object as well as a substantial reduc- ion of the mutual electron interaction in the beam is achieved.