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Telescope Design, Geodesics And The NGST
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by Jim Bergquist on January 19, 2001 06:15:44 UTC |
I am not an expert on telescope design but the use of a corrector plate was a common proceedure before the "problems" were encountered with the Hubble. Corrector plates are used to compensate for the defects inherent in the design of a telescope such as correction for spherical aberration, coma and reshaping of the focal plane. The data that I have indicates that the spherical mirrors of the Hubble were part of the original design. See Astronomical Optics by Daniel J. Schroeder which was published in 1987 by Acedemic Press for more info.
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