DESIGN AND DEVELOPMENT OF AN ELECTRONIC IMAGE MAGNIFIER.

The basic theoretical electron optical design principles of the image magnifier were under development, with interrelationships between the following parameters being studied magnification versus resolution, applied voltages, and distortion and length versus resolution and magnification range. The laboratory prototype tube should have the following characteristics flat input and output variable magnification over the 41 to 11 range i.e., differing cathode areas will be imaged onto foll-screen area distortion resulting on viewing a pattern of horizontal or vertical straight lines to be less than 3 of the diameter of the useful screen area resolution equal to or greater than 500 TV lines per picture and small lengthdiameter ratio. The initial concept for obtaining variable magnification was to form a bi-potential spherical lens between two apertured electrodes. Later, individual lens functions were to perform field flattening, focus, magnification control, and geometry correction.