In the development of new-technology solar coronagraphs based on the use of superpolished primary objective mirrors,1 several optical design solutions have been investigated. A unique solution has been found that represents also a major advance in spherical mirror telescopic designs, specifically the correction of a spherical objective with an extremely weak subaperture corrector, which provides a solution applicable to objectives of 2 m diameter, or even larger. In a tilted-objective design, the use of the corrector plus two tilted secondary mirrors is found to produce an extremely high level of correction.
© 2002 Society of Photo-Optical Instrumentation Engineers
Raymond N. Smartt and Eugene W. Cross, Jr.
"Advances in spherical-mirror telescopic systems design: application to large-aperture solar coronagraphs", Opt. Eng. 41(8), 2055-2058 (Aug 01, 2002). ; http://dx.doi.org/10.1117/1.1489428