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Proceedings Paper

Conception of adaptive multimodular wide-field telescopes with super-large Fresnel number
Author(s): Sergei A. Rodionov; Vladimir S. Korepanov; Dmitry N. Yeskov; Boris B. Bonshtedt; Vladimir V. Reznichenko
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Paper Abstract

Problems are considered referring to development of a large adaptive telescope consisting of individual modules with common image and synthesized aperture. The telescope capabilities are estimated by Fresnel number as product of aperture size by field dimensions divided by wavelength. It is shown that configurations based on `power' modules are most promising ones to provide superlarge values of Fresnel number rather than conventional configurations with afocal modules. Some problems are solved including image matching by using of the images curved surfaces having the common center and simultaneous slope of the modules towards the telescope center. Problem of phasing across the field is solved by introducing spherical aberration into pupils of the modules. A power grating interferometer configuration is suggested, too, usable as a sensor for the synthesized wavefront deformations just during observation of an extent source. As an example, a multimodule telescope configuration is proposed with Fresnel number of up to 5(DOT)104.

Paper Details

Date Published: 9 June 1994
PDF: 12 pages
Proc. SPIE 2200, Amplitude and Intensity Spatial Interferometry II, (9 June 1994); doi: 10.1117/12.177271
Show Author Affiliations
Sergei A. Rodionov, S.I. Vavilov State Optical Institute (Russia)
Vladimir S. Korepanov, S.I. Vavilov State Optical Institute (Russia)
Dmitry N. Yeskov, S.I. Vavilov State Optical Institute (Russia)
Boris B. Bonshtedt, S.I. Vavilov State Optical Institute (Russia)
Vladimir V. Reznichenko, S.I. Vavilov State Optical Institute (Russia)

Published in SPIE Proceedings Vol. 2200:
Amplitude and Intensity Spatial Interferometry II
James B. Breckinridge, Editor(s)

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