Abstract: A bulb assembly, including a faceplate panel portion and a mount assembly, comprising a stem and a multi-beam electron gun assembly, are positioned in axial alignment on respective central longitudinal axes. A reference plane which contains the central longitudinal axis of the bulb assembly and is parallel to a plurality of parallel phosphor lines disposed on one surface of the faceplate panel portion, is established. An orientation plane is then defined with reference to the structure of the electron gun assembly. The orientation plane contains the central longitudinal axis of the mount assembly and two reference points on the structure of the electron gun assembly and passes through the in-line electron beam apertures.

Abstract: A bulb assembly, including a faceplate panel portion, and a mount assembly, comprising a stem and a multi-beam electron gun assembly, are positioned in axial alignment on respective central longitudinal axes. A reference plane which contains the central longitudinal axis of the bulb assembly and a major axis of the panel portion, is established. An orientation plane is then defined with reference to the structure of the electron gun assembly. The orientation plane is parallel to the central longitudinal axis of the mount assembly and includes two reference points on the structures of the electron gun assembly. The mount assembly is then rotated with respect to the bulb assembly on the coincident longitudinal axes until the orientation plane is at a prescribed angle with respect to the reference plane as optically indicated by the relative position of the two reference points with respect to each other.