Design of a derotator for the 4 m DAG telescope

Jérémie Baudet; Laurent Jolissaint; Onur Keskin; Cahit Yesilyaprak; Sinan K. Yerli

doi:10.1117/12.2234392

9 August 2016 Design of a derotator for the 4 m DAG telescope

Jérémie Baudet, Laurent Jolissaint, Onur Keskin, Cahit Yesilyaprak, Sinan K. Yerli

Proceedings Volume 9908, Ground-based and Airborne Instrumentation for Astronomy VI; 99085L (2016) https://doi.org/10.1117/12.2234392
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

This paper summarize our work on the design of a field derotator for the adaptive optics instruments Nasmyth platform of DAG (Dogu Anadolu Gozlemevi), a new 4 m telescope for astronomical observations near the city of Erzurum, Turkey. While the telescope follows an astronomical object, its pupil sees a rotation of the object around the optical axis which depends on the telescope geographic coordinate and the object sky coordinate. This effect is called the field rotation. This rotation needs to be compensated during the astronomical object data acquisition. In this report we demonstrate the feasibility of placing the derotator (a K-mirror design) in the telescope fork central hole and propose a preliminary design, considering flexures.

Citation Download Citation

Jérémie Baudet, Laurent Jolissaint, Onur Keskin, Cahit Yesilyaprak, and Sinan K. Yerli "Design of a derotator for the 4 m DAG telescope", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99085L (9 August 2016); https://doi.org/10.1117/12.2234392

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