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Proceedings Paper

Optical design of a 25-m telescope for optical wavelengths
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Paper Abstract

Results from the design of a 28 m optical telescope with a spherical segmented primary are presented. The telescope is a four mirror configuration reimaging M1 on M4. The wish for a small and compact structure resulting in a need for controlling high order aspherical mirror coefficients has initiated development of a design procedure satisfying Fermat principle and Abbes Sine condition. Thus the only remaining point aberration will be astigmatism. For a given shape of M4, the design procedure delivers the Taylor expansion coefficients for the shapes of M3 and M4 to be directly used for optical analysis by software capable of handling the needed number of coefficients.

Paper Details

Date Published: 1 June 1994
PDF: 5 pages
Proc. SPIE 2199, Advanced Technology Optical Telescopes V, (1 June 1994); doi: 10.1117/12.176268
Show Author Affiliations
Mette Owner-Petersen, Nordic Telescope Group (Denmark)
Torben Andersen, Nordic Telescope Group (Denmark)
Arne L. Ardeberg, Lund Observatory (Sweden)


Published in SPIE Proceedings Vol. 2199:
Advanced Technology Optical Telescopes V
Larry M. Stepp, Editor(s)

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