Theory of Operation and Performance of High-Resolution Return-Beam Vidicon Cameras—A Comparison with High-Resolution Photography

  • Otto H. SchadeSr.
Part of the Optical Physics and Engineering book series (OPEG)


The maximum quantum efficiency of ASOS photoconductor is more than two orders of magnitude higher than that of photographic emulsions. The ASOS photoconductor is essentially grainless, its modulation transfer function (MTF) is at least equal to that of the best high-resolution film, and it can store electron densities twenty times greater than the maximum grain density of the best film emulsion. It is not surprising that, for equal resolving power, a far higher sensitivity is expected of high-resolution television systems than is obtainable with photographic cameras.


Signal Current Modulation Transfer Function Contrast Ratio Polarize Potential Readout System 
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  1. 1.
    W. E. Forsythe (ed.), Smithsonian Physical Tables, 9th rev. ed., The Smithsonian Institute (1956).Google Scholar
  2. 2.
    Otto H. Schade, Sr., “The Resolving Power Functions and Quantum Processes Television Camera,” RCA Rev. 28(3), 460 (1967).Google Scholar
  3. 3.
    Otto H. Schade, Sr., “Image Analysis in Photographic and Television Systems (Definition and Sharpness),” J. SMPTE 64, 614, 615 (1955).CrossRefGoogle Scholar
  4. 4.
    Otto H. Schade, Sr., “An Evaluation of Photographic Image Quality and Resolving Power,” J. SMPTE 73, 81 (1964).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1971

Authors and Affiliations

  • Otto H. SchadeSr.
    • 1
  1. 1.RCA LaboratoriesHarrisonUSA

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