Electronic magnification for astronomical camera tubes

Details Electronic magnification for astronomical camera tubes Electronic magnification for astronomical camera tubes

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974stin...7529961v&link_type=abstract

Final Report Westinghouse Research Labs., Pittsburgh, PA. Electronic Tube Div.

Physics

Camera Tubes, Hubble Space Telescope, Magnification, Television Systems, Field Coils, Image Intensifiers, Magnetic Fields

Scientific paper

Definitions, test schemes, and analyses used to provide variable magnification in the image section of the television sensor for large space telescopes are outlined. Experimental results show a definite form of magnetic field distribution is necessary to achieve magnification in the range 3X to 4X. Coil systems to establish the required field shapes were built, and both image intensifiers and camera tubes were operated at high magnification. The experiments confirm that such operation is practical and can provide satisfactory image quality. The main problem with such a system was identified as heating of the photocathode due to concentration of coil power dissipation in that vicinity. Suggestions for overcoming this disadvantage are included.

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