An input screen for an image intensifier tube and a method of making the same.

摘要

An input screen and method of forming one for an image intensifier tube including a substrate in which a plurality of crystal grains of aluminium or aluminium alloy are formed in a random manner in a surface. The crystal grains are formed by heating in a vacuum or non-oxidising atmosphere at a temperature between 450°C and 650°C. The oxidised layer is next removed by etchant and a phosphor layer formed on the crystal grains by vapour-deposition.