Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982itt..reptr....h&link_type=abstract
Final Report ITT Aerospace/Optical Div., Fort Wayne, IN.
Astronomy and Astrophysics
Astronomy
Astronomical Photography, Display Devices, Image Tubes, Phosphors, Photographic Film, Densitometers, Electronic Equipment Tests, Film Thickness, Modulation Transfer Function, Optical Properties
Scientific paper
The production and evaluation of a magnetic focus image tube for astronomical photography that has an intagliated phosphor screen is described. The modulation transfer function of such a tube was measured by electronic means and by film tests, and the results compared with tubes of more conventional construction. The physical properties of the image tube and film combination, the analytical model of the optical interface, and the salient features of the intagliated screen tube are described. The results of electronic MTF tests of the intagliated image tube and of the densitometry of the tube and film test samples are presented. It is concluded that the intagliated screen is a help, but that the thickness of the photographic film is also important.
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