Four-mirror unobscured anastigmatic telescopes with all-spherical surfaces
- 1 April 1978
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 17 (7) , 1072-1074
- https://doi.org/10.1364/ao.17.001072
Abstract
A variety of four-mirror telescopes are described, all corrected for spherical aberration, coma, and astigmatism; all unobscured; and all with spherical surfaces. Performance is discussed with an afocal beam expander and a flat-field telescope as typical design examples.Keywords
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