In this paper we denote a radiation emitting source as weak, when the speed of the image forming system does not suffice to produce an image of the desired quality.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1969

Authors and Affiliations

  • H. J. Einighammer
    • 1
  1. 1.Astronomisches InstitutUniversität TübingenDeutschland

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