Abstract

The invention concerns a time gated image intensifier tube comprising: - a photocathode (13), - a micro channel plate (15), - a screen (16), - an housing (19) holding the photocathode (13), the micro channel plate (15) and the screen (16), the housing (19) comprising: ⋅ a first metal ring (20) connected to the photocathode (13); ⋅ a second metal ring (22) connected to the micro channel plate (15); ⋅ a ceramic ring (21) disposed between the first (20) and the second metal ring (22); the time gated image intensifier tube being characterized in that the first metal ring (20) is connected to the second metal ring (22) via at least one resistive link, named "filtering resistive link", said filtering resistive link (31) comprising at least one resistive element arranged between the first and the second metal ring and covering an angular section of between 30° and 150° with reference to a point (25) of application of an electrical pulse on the first metal ring.

IPC Classes  ?

• H01J 29/92 - Means forming part of the tube for the purpose of providing electrical connection to it
• H01J 29/96 - One or more circuit elements structurally associated with the tube
• H01J 31/50 - Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output

Abstract

An electron multiplying structure for use in a vacuum tube using electron multiplying, the electron multiplying structure having an input face intended to be oriented in a facing relationship with an entrance window of the vacuum tube, an output face intended to be oriented in a facing relationship with a detection surface of the vacuum tube, wherein the electron multiplying structure at least is composed of a semi-conductor material layer adjacent the detection windows. Also disclosed is a vacuum tube using electron multiplying with an electron multiplying structure.

IPC Classes  ?

• H01J 1/62 - Luminescent screensSelection of materials for luminescent coatings on vessels
• H01J 43/04 - Electron multipliers
• H01J 1/32 - Secondary-electron emitting electrodes
• H01J 31/48 - Tubes with amplification of output effected by electron-multiplier arrangements within the vacuum space
• H01J 31/50 - Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
• H01J 43/16 - Electrode arrangements using essentially one dynode

Abstract

A photo cathode for use in a vacuum tube including a cathode layer, having an entrance face capable of absorbing photons impinging on the cathode layer, and an exit face for releasing electrons upon impinging of the photons, and an electron exit layer, in facing relationship with the exit face of the cathode layer for improving the releasing of the electrons, and a carbon containing layer, positioned between the exit face of the cathode layer and the electron exit layer, for bonding the electron exit layer to the cathode layer.

IPC Classes  ?

• H01J 40/06 - Photo-emissive cathodes
• H01J 1/34 - Photo-emissive cathodes

Abstract

The invention relates to an electron multiplying structure for use in a vacuum tube using electron multiplying and to an vacuum tube using electron multiplying provided with such an electron multiplying structure. According to the invention an electron multiplying structure is proposed for use in a vacuum tube using electron multiplying, the electron multiplying structure comprising an input face intended to be oriented in a facing relationship with an entrance window of the vacuum tube, an output face intended to be oriented in a facing relationship with a detection surface of the vacuum tube, wherein the electron multiplying structure at least is composed of a semi-conductor material layer adjacent the detection windows.

IPC Classes  ?

• H01J 31/50 - Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
• H01J 40/06 - Photo-emissive cathodes
• H01J 1/32 - Secondary-electron emitting electrodes

Abstract

The invention relates to a photo cathode for use in a vacuum tube at least comprising a cathode layer, having an entrance face capable for absorbing photons impinging on said cathode layer, and an exit face for releasing electrons upon impinging of said photons; as well as an electron exit layer, in facing relationship with said exit face of said cathode layer for improving said releasing of said electrons; and a carbon containing layer, positioned between said exit face of said cathode layer and said electron exit layer, for bonding said electron exit layer to said cathode layer. The invention also relates to a vacuum tube using such a photo cathode.

IPC Classes  ?

• H01J 31/50 - Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output