Comparison of large aperture telescopes with parabolic and spherical primaries

Details Comparison of large aperture telescopes with parabolic and spherical primaries Comparison of large aperture telescopes with parabolic and spherical primaries

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986opten..25.1034k&link_type=abstract

Optical Engineering (ISSN 0091-3286), vol. 25, Sept. 1986, p. 1034-1038.

Physics

Optics

Cassegrain Optics, Mirrors, Paraboloid Mirrors, Spaceborne Telescopes, Image Analysis, Misalignment, Optical Correction Procedure, Performance Prediction, Spheres, Surface Roughness

Scientific paper

Quasi-Cassegrain-type four-mirror telescopes are compared to conventional two-mirror Cassegrain telescopes for use as high performance, very large aperture space telescopes. Spherical and parabolic primaries with continuous as well as segmented surfaces are considered. Imaging characteristics and misalignment sensitivities serve as the principal criteria of comparison. The evaluation shows that parabolic primaries yield superior wide-field performance, whereas spherical primaries hold distinct advantages regarding manufacturability and regarding certain alignment aspects in the case of segmentation.

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