Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977prnc.reptq....s&link_type=abstract
Final Report, 1 Jan. 1975 - 31 Aug. 1976 Princeton Univ., NJ. Dept. of Astrophysical Sciences.
Astronomy and Astrophysics
Astronomy
Camera Tubes, Spaceborne Astronomy, Spaceborne Telescopes, Television Cameras, Astronomical Photometry, Environmental Tests, High Resolution, Magnetic Fields, Photocathodes
Scientific paper
A magnetically focused SEC tube developed for photometric applications is described. Efforts to design a 70 mm version of the tube which meets the ST f/24 camera requirements of the space telescope are discussed. The photometric accuracy of the 70 mm tube is executed to equal that of the previously developed 35 mm tube. The tube meets the criterion of 50 percent response at 20 cycles/mm in the central region of the format, and, with the removal of the remaining magnetic parts, this spatial frequency is expected over almost all of the format. Since the ST f/24 camera requires sensitivity in the red as well as the ultraviolet and visible spectra, attempts were made to develop tubes with this ability. It was found that it may be necessary to choose between red and u.v. sensitivity and tradeoff red sensitivity for low background. Results of environmental tests indicate no substantive problems in utilizing it in a flight camera system that will meet the space shuttle launch requirements.
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