منابع مشابه
The Palomar 200-inch f/9 Cassegrain CCD camera
This article describes the design and construction of a CCD camera for the f/9 Cassegrain focus of the 200-inch (5 m) Hale Telescope at Palomar Observatory. This instrument utilizes a set of 18inch (0.45 m) diameter lenses to change the Cassegrain focal ratio from f/16 to f/9, and the optical design prescription of these lenses is reported. For CCDs having 24zm pixels, the f/9 focus gives a rec...
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ژورنال
عنوان ژورنال: Nature
سال: 1939
ISSN: 0028-0836,1476-4687
DOI: 10.1038/143317a0