RAFTER: Ring Astrometric Field Telescope for Exo-planets and Relativity

Alberto Riva; Mario Gai; Alberto Vecchiato; Deborah Busonero; Mario Glilberto Lattanzi; Federico Landini; Zhaoxiang Qi; Zhenghong Tang

doi:10.1117/12.2576806

13 December 2020 RAFTER: Ring Astrometric Field Telescope for Exo-planets and Relativity

Alberto Riva, Mario Gai, Alberto Vecchiato, Deborah Busonero, Mario Glilberto Lattanzi, Federico Landini, Zhaoxiang Qi, Zhenghong Tang

Author Affiliations +

Proceedings Volume 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave; 114430P (2020) https://doi.org/10.1117/12.2576806
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

High precision astrometry aims at source position determination to a very small fraction of the diffraction image size, in high SNR regime. One of the key limitations to such goal is the optical response variation of the telescope over a sizeable FOV, required to ensure that bright reference objects to any selected target. The issue translates into severe calibration constraints, and/or the need for complex telescope and focal plane metrology. We propose an innovative system approach derived from the established TMA telescope concept, extended to achieve high filling factor of an annular field of view around the optical axis of the telescope. The proposed design is a very compact, 1 m class telescope compatible with modern CCD and CMOS detectors (EFL = 15 m). We describe the concept implementation guidelines and the optical performance of the current optical design. The diffraction limited FOV exceeds 1.25 square degrees, and the detector occupies the best 0.25 square degree with 66 devices.

Conference Presentation

Citation Download Citation

Alberto Riva, Mario Gai, Alberto Vecchiato, Deborah Busonero, Mario Glilberto Lattanzi, Federico Landini, Zhaoxiang Qi, and Zhenghong Tang "RAFTER: Ring Astrometric Field Telescope for Exo-planets and Relativity", Proc. SPIE 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, 114430P (13 December 2020); https://doi.org/10.1117/12.2576806

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