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Proceedings Paper

Remote phasing of the Multiple-Mirror Telescope with far-field optimization
Author(s): Naresh C. Mehta; Clinton W. Allen
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Paper Abstract

In order to achieve diffraction-limited performance in a distributed aperture optical system such as the multiple mirror telescope, the elements must be optically phased to form a single aperture which can be a difficult task. In this paper, we report a novel, iterative adaptive control method, called far-field optimization, which employs the simplex algorithm to configure the elements of a distributed aperture telescope to optical alignment. Far-field optimization does not require the knowledge of the adaptive mirror surfaces, thus eliminating the need for a wavefront sensor, but uses a simple measure of the point-spread function (image-plane intensity). We present results of computer simulations to demonstrate the utility of far-field optimization to remotely align the six-element multiple mirror telescope in a few seconds, even in the presence of drifting atmospheric turbulence.

Paper Details

Date Published: 18 September 1997
PDF: 11 pages
Proc. SPIE 3112, Telescope Control Systems II, (18 September 1997); doi: 10.1117/12.284224
Show Author Affiliations
Naresh C. Mehta, consultant (United States)
Clinton W. Allen, consultant (United States)

Published in SPIE Proceedings Vol. 3112:
Telescope Control Systems II
Hilton Lewis, Editor(s)

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