APPLIED RESEARCH ON HIGH RESOLUTION CAMERA TUBES.
Final summary rept. for 1 Apr 63-31 May 64,
RADIO CORP OF AMERICA LANCASTER PA
Pagination or Media Count:
In order to achieve the desired resolution and signal-tonoise ratio, tubes with vidicon photoconductive targets were built with the required 2 in x 2 in image area. Photoconductive targets typically achieve the 40 db signal-to-noise ratio and give 2000 TV lines at 50 response. In addition, when a suitable distribution of magnetic focus field is used there is very little reduction of resolution from the center to the corners of the image and furthermore, no dynamic focus modulation is required. It was found that the vidicon tubes with field mesh and uniform potential within the deflection space are the most satisfactory even in spite of the fact that some degradation of resolution, due to the 1000 line-per-inch mesh, is present. A study was made of the magnetic focus and deflection fields and of the path of beam under various focus field configurations and deflection amplitudes. A start was made toward computer calculation of beam aberrations in the measured field distributions. Although additional work was done toward plug-type integral mesh targets, the improvements made were not sufficient to make these targets practical. Author