Projection storage kinescope for large radar displays

The storage kinescope has been adapted experimentally to provide high brightness on a spherical luminescent screen suitable for use in reflective optics projection systems. Spherical collector and storage mesh structures are used which aid in maintaining picture uniformity at high brightness, and permit a larger ratio of picture-to-bulb diameter. With experimental tubes highlight brightness of 5000 foot lamberts has been achieved on the 4½-inch diameter phosphor with a resultant brightness of several foot lamberts on a 48" projected display. These results were obtained at less than 20 kv final voltage and less than 1 ma final current.