A compact design of a WFS for a natural guide star-based ELT adaptive optics system

Jacopo Farinato; Valentina Viotto; Roberto Ragazzoni; Carmelo Arcidiacono; Andrea Baruffolo; Marco Dima; Giorgia Gentile; Demetrio Magrin; Pierfrancesco Rossettini

doi:10.1117/12.857304

28 July 2010 A compact design of a WFS for a natural guide star-based ELT adaptive optics system

Jacopo Farinato, Valentina Viotto, Roberto Ragazzoni, Carmelo Arcidiacono, Andrea Baruffolo, Marco Dima, Giorgia Gentile, Demetrio Magrin, Pierfrancesco Rossettini

Author Affiliations +

Proceedings Volume 7736, Adaptive Optics Systems II; 77362M (2010) https://doi.org/10.1117/12.857304
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

We describe the opto-mechanical implementation of a group of wavefront sensors able to drive an MCAO system in order to cover a Field of View of the order of 1-2 arc-minutes, but getting advantages from the starlight coming from a Field of View as large as 10 arc-minutes in diameter. This involves a number of arms with a miniaturized, very small Field of View, single reference Adaptive Optics systems. A pyramid wavefront sensor working in close loop is fed through a small Deformable Mirror that is continuously monitored by an extremely high dynamic range wavefront sensor, whose signal has similar modality than the Pyramid one, namely YAW. In this way, a very compact wavefront sensor with a dynamic range limited by the stroke of the Deformable Mirror is achieved. Such a sensor is characterized by a limiting magnitude performances typical of a closed loop coherent wavefront sensor. This concept, in addition with an architecture of a Wavefront Computer that allows the implementation of a number of virtual Deformable Mirrors, allows for the development of a NGS based concept described elsewhere. Emphasis is given in this talk to the practical implementation and to the opto-mechanical details, including an overview of the required components, especially the detectors and the deformable mirrors and we show that the goal is attainable with today existing components.

Citation Download Citation

Jacopo Farinato, Valentina Viotto, Roberto Ragazzoni, Carmelo Arcidiacono, Andrea Baruffolo, Marco Dima, Giorgia Gentile, Demetrio Magrin, and Pierfrancesco Rossettini "A compact design of a WFS for a natural guide star-based ELT adaptive optics system", Proc. SPIE 7736, Adaptive Optics Systems II, 77362M (28 July 2010); https://doi.org/10.1117/12.857304

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