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Manufacturing process for the WEAVE prime focus corrector optics for the 4.2m William Hershel Telescope

Date Issued
2016
Author(s)
Lhomé, Emilie
•
Agócs, Tibor
•
Abrams, Don Carlos
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Dee, Kevin M.
•
Middleton, Kevin F.
•
Tosh, Ian A.
•
Jaskó, Attila
•
Connor, Peter
•
Cochrane, Dave
•
Gers, Luke
•
Jonas, Graeme
•
•
Benn, Chris R.
•
Balcells, Marc
•
Trager, Scott C.
•
Dalton, Gavin B.
•
Carrasco, Esperanza
•
•
•
Aguerri, J. Alfonso L.
DOI
Abstract
In this paper, we detail the manufacturing process for the lenses that will constitute the new two-degree field-of-view Prime Focus Corrector (PFC) for the 4.2m William Herschel Telescope (WHT) optimised for the upcoming WEAVE Multi-Object Spectroscopy (MOS) facility. The corrector, including an Atmospheric Dispersion Corrector (ADC), is made of six large lenses, the largest being 1.1-meter diameter. We describe how the prescriptions of the optical design were translated into manufacturing specifications for the blanks and lenses. We explain how the as-built glass blank parameters were fed back into the optical design and how the specifications for the lenses were subsequently modified. We review the critical issues for the challenging manufacturing process and discuss the trade-offs that were necessary to deliver the lenses while maintaining the optimal optical performance. A short description of the lens optical testing is also presented. Finally, the subsequent manufacturing steps, including assembly, integration, and alignment are outlined.
Coverage
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
All editors
Navarro, Ramón; Burge, James H.
Series
Volume
9912
Start page
991245
Conferenece
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Conferenece place
Edinburgh, UK
Conferenece date
26 June - 1 July, 2016
Uri
Url
Issn Identifier
0277-786X
Ads BibCode
2016SPIE.9912E..45L
Rights
open.access
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