Abstract: The invention includes an electron tube such as an image intensifier which utilizes a channel-type electron multiplier. The multipler is made of a perforated glass plate made in a manner such that secondary emission may be produced at the interior surfaces of the holes through the plate. Primary electrons are introduced to the holes at one end and a much larger emission emanates from the other end. Conductive layers on each side of the plate have holes in registration with the plate holes. The conductive layers are maintained at potentials to accelerate electron flow through the holes. In accordance with the present invention, a third conductive layer is provided at the output side. When the third conductive layer is maintained negative, resolution is improved.

Abstract: 1. An electron multiplier mosaic structure comprising:A plurality of alternate layers of uniform metallic and insulating material;An intermediate coating of metallic bonding material joining each adjacent layer in a solid unitary structure;A plurality of closely spaced apertures formed through said layers and arranged in a regular pattern on the opposite ends of said structure, each said aperture forming a continuous smooth interior surface between said ends, the metallic layer portions of said surface having secondary emission characteristics.