Final optical design for the WEAVE two-degree prime focus corrector

Tibor Agócs; Don Carlos Abrams; Emilie Lhomé; Kevin Dee; Gavin Dalton; Kevin Middleton; Piercarlo Bonifacio; J. Alfonso L. Aguerri; S. C. Trager

doi:10.1117/12.2055306

24 July 2014 Final optical design for the WEAVE two-degree prime focus corrector

Tibor Agócs, Don Carlos Abrams, Emilie Lhomé, Kevin Dee, Gavin Dalton, Kevin Middleton, Piercarlo Bonifacio, J. Alfonso L. Aguerri, S. C. Trager

Author Affiliations +

Proceedings Volume 9147, Ground-based and Airborne Instrumentation for Astronomy V; 914773 (2014) https://doi.org/10.1117/12.2055306
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

WEAVE is the next-generation wide-field optical spectroscopy facility for the William Herschel Telescope (WHT) in La Palma, Canary Islands, Spain. We present the final optical design for the two-degree Prime Focus Corrector (PFC) for the WHT optimised for WEAVE. The nominal optical design provides a polychromatic PSF that does not exceed 0.6 arcsec (80% encircled energy diameter) over a wavelength range from 370 to 1000 nm covering a two-degree field-of-view (FOV) for zenith angles up to 65 degrees. We describe the optical issues that had to be addressed prior to the Final Design Review (FDR) and present the trade-offs that were necessary between manufacturability and performance. We detail the results of an in-depth Monte Carlo simulation that contains all the manufacturing, alignment and stability issues that affect the PSF error budget of the Prime Focus Corrector. As a result of multiple iterations regarding the different tolerances of the system, the polychromatic PSF (80% encircled energy diameter) including all errors stays below the required 1 arcsec.

Citation Download Citation

Tibor Agócs, Don Carlos Abrams, Emilie Lhomé, Kevin Dee, Gavin Dalton, Kevin Middleton, Piercarlo Bonifacio, J. Alfonso L. Aguerri, and S. C. Trager "Final optical design for the WEAVE two-degree prime focus corrector", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914773 (24 July 2014); https://doi.org/10.1117/12.2055306

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