Abstract: A microchannel electron multiplier is formed by placing into a glass tube a plurality of bundles optical fibers, each having an etchable glass core and a glass cladding which is non-etchable when subjected to the conditions used for etching the core material. The fiber bundles located around the inside edge of the glass tube are replaced by support fibers having both a core and a cladding of a material which is non-etchable under the above-described conditions. The assembly of the tube, bundles and support fibers is heated to fuse the tube, bundles and support fibers together. The etchable core material is then removed and the assembly sliced into wafers. The inner surface of each of the claddings which bound the channel formed after removal of the core material is rendered electron emissive by reduction of the lead oxide by hydrogen gas. Metal films are deposited onto the opposed surfaces of each of the wafers to form contacts.

Abstract: A microchannel electron multiplier is formed by placing into a glass tube a plurality of bundles optical fibers, each having an etchable glass core and a glass cladding which is non-etchable when subjected to the conditions used for etching the core material. The fiber bundles located around the inside edge of the glass tube are replaced by support fibers having both a core and a cladding of a material which is non-etchable under the above-described conditions. The assembly of the tube, bundles and support fibers is heated to fuse the tube, bundles and support fibers together. The etchable core material is then removed and the assembly sliced into wafers. The inner surface of each of the claddings which bound the channel formed after removal of the core material is rendered electron emissive by reduction of the lead oxide by hydrogen gas. Metal films are deposited onto the opposed surfaces of each of the wafers to form contacts.

Abstract: An image intensifier tube and a method of making same are disclosed wherein veiling glare caused by the amplification of off-axis light is reduced. A face plate is formed from a fused assembly of a glass rod having a low reflective, light absorbing layer thereon, a cladding tube and a jacket tube. The fused assembly is then cut into wafer-shaped slices and the ends polished.

Abstract: An image intensifier tube and a method of making same is disclosed wherein veiling glare caused by the amplification of off axis light is reduced. Included is a colored, low reflective, light absorbing layer formed in the face plate of the tube adjacent any surface at which off axis light could otherwise be reflected to the photoemissive device associated with the face plate.