Abstract: In a flat panel display device a beam guide assembly includes electron guide meshes, a focus mesh and an acceleration mesh, which are retained in a spaced parallel relationship by insulative posts. Modulation electrodes, within an electron gun section of the display device, are extended toward the guide meshes so that the guide meshes and the modulation electrode partially overlap in a spaced parallel relationship. The focus and acceleration meshes are extended toward the gun section to partially overlap the modulation electrodes in a spaced parallel relationship. Insulative posts are arranged along the extended portions to retain the spaced parallel relationships of the electrodes and the meshes. A cathode support is held by the insulative posts and supports a cathode within the gun section in the desired location and orientation with respect to the guide meshes. A unitized beam guide/electron gun assembly is thus achieved.

Abstract: A method of producing an information storage disc by optical techniques includes the steps of coating a flat, reflective disc surface with a thin coating of radiant energy sensitive material, moving the coated disc relative to a coherent light beam, which is intensity modulated with the information to be recorded, to expose the radiant energy sensitive material, and developing the radiant energy sensitive material to form a track having geometric variations in the disc representative of the modulated information signals.