Cold optical design for the large aperture Simons' Observatory telescope
Abstract
The Simons Observatory will consist of a single large (6 m diameter) telescope and a number of smaller (∼0.5 m diameter) refracting telescopes designed to measure the polarization of the Cosmic Microwave Background to unprecedented accuracy. The large aperture telescope is the same design as the CCAT-prime telescope, a modified Crossed Dragone design with a field-of-view of over 7.8 degrees diameter at 90 GHz. This paper presents an overview of the cold reimaging optics for this telescope and what drove our choice of 350-400 mm diameter silicon lenses in a 2.4 m cryostat over other possibilities. We will also consider the future expandability of this design to CMB Stage-4 and beyond.
- Publication:
-
Ground-based and Airborne Telescopes VII
- Pub Date:
- July 2018
- DOI:
- 10.1117/12.2313444
- arXiv:
- arXiv:1808.05058
- Bibcode:
- 2018SPIE10700E..3ED
- Keywords:
-
- Astrophysics - Instrumentation and Methods for Astrophysics