Wavefront curvature sensing on highly segmented telescopes

Gary A. Chanan

doi:10.1117/12.459856

30 January 2003 Wavefront curvature sensing on highly segmented telescopes

Gary A. Chanan

Proceedings Volume 4840, Future Giant Telescopes; (2003) https://doi.org/10.1117/12.459856
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

Curvature sensing, unlike some other wavefront sensing techniques, treats the boundary and interior of the aperture of interest in fundamentally different ways. This leads to complications for highly segmented telescopes (100 or more segments), as a significant fraction of points on the wavefront are simultaneously in the interior of the overall aperture and near a segment boundary. Although this effect may make it difficult to implement curvature sensing for adaptive optics on such telescopes, it may conversely be exploited for primary mirror segment alignment. We present numerical simulations which show that curvature methods should be an effective method for segment tip/tilt alignment on highly segmented mirrors.

Citation Download Citation

Gary A. Chanan "Wavefront curvature sensing on highly segmented telescopes", Proc. SPIE 4840, Future Giant Telescopes, (30 January 2003); https://doi.org/10.1117/12.459856

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available