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Proceedings Paper

Refractive telescope systems for future cosmic microwave background polarimetry experiments
Author(s): Peter Hargrave; Giorgio Savini; Marcin Gradziel; Neil Trappe; Niall Tynan; Massimo Candotti; Anthony Challinor; Stig Sørenson; Peter Ade; Rashmi Sudiwala; Maarten van der Vorst
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Paper Abstract

This paper presents the key findings of an ESA-funded programme of work to investigate refractive systems and their application to precision polarimetry experiments. We briefly summarize the derivation of requirements on the optical system for CMB polarimetry, and the design of a refractive telescope system which meets these stringent requirements. An extensive programme of experimental work was undertaken in order to better understand the optical, thermal and mechanical characteristics of the lens material, and of lenses made from this material. A repeatable and controllable antireflection coating procedure was developed and validated, and used to coat lenses used in this study. Optical measurements before and after coating have been used to validate a new module for an industry-standard antenna modelling software package.

Paper Details

Date Published: 23 July 2014
PDF: 16 pages
Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 915314 (23 July 2014); doi: 10.1117/12.2054634
Show Author Affiliations
Peter Hargrave, Cardiff Univ. (United Kingdom)
Giorgio Savini, Univ. College London (United Kingdom)
Marcin Gradziel, National Univ. of Ireland, Maynooth (Ireland)
Neil Trappe, National Univ. of Ireland, Maynooth (Ireland)
Niall Tynan, National Univ. of Ireland, Maynooth (Ireland)
Massimo Candotti, National Univ. of Ireland, Maynooth (Ireland)
Anthony Challinor, Univ. of Cambridge (United Kingdom)
Stig Sørenson, TICRA (Denmark)
Peter Ade, Cardiff Univ. (United Kingdom)
Rashmi Sudiwala, Cardiff Univ. (United Kingdom)
Maarten van der Vorst, European Space Agency (Netherlands)

Published in SPIE Proceedings Vol. 9153:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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