Laboratory demonstration of a liquid atmospheric dispersion corrector

J. Zheng*, W. Saunders, J. S. Lawrence, F. Bastien, F. Cantalloube

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

3 Citations (Scopus)

Abstract

A liquid atmospheric dispersion corrector (LADC) is investigated to compensate atmospheric dispersion for modern extremely large telescopes (ELTs). The LADC uses a pair of immiscible liquids in a small glass container which can be placed very close to the telescope focal plane. A pair of liquid prisms is formed and the apex of the two prisms varies with telescope zenith because of gravity. The idea is that a large number of independent deployable units (e.g., AAO's 'Starbugs') would each carry its own LADC. Three pairs of liquids were identified that were found suitable for use in an LADC after thousands of chemicals were investigated. We have theoretically and experimentally verified that LADC can correct atmospheric dispersion adaptively. It is demonstrated that a LADC can correct a simulated atmospheric dispersion of 0.34° at a Zenith of 48°, over a wavelength range of 370nm to 655nm. The experimental results show very good agreement with the optical (Zemax) model.

Original languageEnglish
Title of host publicationModern Technologies in Space- and Ground-Based Telescopes and Instrumentation II
EditorsRamón Navarro, Colin R. Cunningham, Eric Prieto
Place of PublicationBellingham, WA
PublisherSPIE
Pages84500F-1-84500F-9
Number of pages9
Volume8450
ISBN (Print)9780819491510
DOIs
Publication statusPublished - 2012
EventModern Technologies in Space- and Ground-Based Telescopes and Instrumentation II - Amsterdam, Netherlands
Duration: 1 Jul 20126 Jul 2012

Other

OtherModern Technologies in Space- and Ground-Based Telescopes and Instrumentation II
CountryNetherlands
CityAmsterdam
Period1/07/126/07/12

Keywords

  • Astronomical optics
  • Atmospheric dispersion compensation
  • Liquid optics

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