Exact optics - II. Exploration of designs on- and off-axis
| Autor: | R. V. Willstrop, Donald Lynden-Bell |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Physics
Reflecting telescope business.industry Astrophysics::Instrumentation and Methods for Astrophysics Cassegrain reflector Astronomy and Astrophysics Coma (optics) law.invention Telescope Spherical aberration Optics Space and Planetary Science law Focal length Astrophysics::Earth and Planetary Astrophysics Focus (optics) business Spectrograph |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 342:33-49 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1046/j.1365-8711.2003.06434.x |
| Popis: | The two-mirror telescopes/cameras that have no coma, no spherical aberration and arbitrarily fast focal ratios form a two-parameter (s, K) family of exact optical designs analytically derived earlier. We explore the full range of these designs in the s‐K plane. Here s is the mirror separation/focal length and K is the distance from secondary to focus/focal length. Besides perfect-focus analogues of most well-known telescope designs, there are families of spectrograph cameras, X-ray telescopes and solar furnaces. Systems with s = 2 have minimum astigmatism and have exceptionally good images. |
| Databáze: | OpenAIRE |
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