Piston detection of a segmented mirror telescope using a curvature sensor: preliminary results with numerical simulations

Jose M. Rodriguez-Ramos; Jesus Jimenez Fuensalida

doi:10.1117/12.269088

21 March 1997 Piston detection of a segmented mirror telescope using a curvature sensor: preliminary results with numerical simulations

Jose M. Rodriguez-Ramos, Jesus Jimenez Fuensalida

Author Affiliations +

Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269088
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

Abstract

Segments alignment is one of the fundamental factors affecting the shape of the PSF of a segmented mirror telescope. Tilt and piston of each segment must be very well and uniformly adjusted in relation with the rest of the segments. The Hartmann-Shack sensor is very efficient in detecting the local wavefront tilt, but the task to take measurements of piston using this sensor is annoying enough specially when the wavefronts are affected by atmospheric turbulence. We show, with numerical simulations, that curvature sensing is sensitive enough in order to detect piston errors in the segmented mirrors, even in the presence of the atmospheric turbulence. It would permit the taking of measurements of piston with natural stars during observation time.

Citation Download Citation

Jose M. Rodriguez-Ramos and Jesus Jimenez Fuensalida "Piston detection of a segmented mirror telescope using a curvature sensor: preliminary results with numerical simulations", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269088

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