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Proceedings Paper

Transmission and opto-mechanical performance of the liquid lens coupling in the Robert Stobie Spectrograph on SALT
Author(s): Ockert J. Strydom; Éric Depagne; Darragh O'Donoghue; Martin Wilkinson; Wouter Lochner; Jonathan Love; Lisa Crause; Janus Brink; Kenneth H. Nordsieck; J. Alan Schier
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Paper Abstract

Liquid lens coupling provides excellent transmission efficiency when compared to multilayer coatings especially for applications where broadband transmission is required. However, long term reliability of liquid coupling is difficult to achieve. This is typically due to chemical compatibility issues affecting both the optical transmission and the integrity of the opto-mechanical support. As part of a recent service of the Robert Stobie Spectrograph on SALT we had the opportunity to study these problems further and in this paper we provide analysis of problems identified and some solutions to prevent them. We also present general guidelines which could aid future opto-mechanical designs for liquid coupling of lenses.

Paper Details

Date Published: 22 July 2016
PDF: 14 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 99123D (22 July 2016); doi: 10.1117/12.2232243
Show Author Affiliations
Ockert J. Strydom, South African Large Telescope (South Africa)
South African Astronomical Observatory (South Africa)
Éric Depagne, South African Large Telescope (South Africa)
South African Astronomical Observatory (South Africa)
Darragh O'Donoghue, South African Large Telescope (South Africa)
South African Astronomical Observatory (South Africa)
Martin Wilkinson, South African Large Telescope (South Africa)
South African Astronomical Observatory (South Africa)
Wouter Lochner, South African Large Telescope (South Africa)
Jonathan Love, South African Large Telescope (South Africa)
South African Astronomical Observatory (South Africa)
Lisa Crause, South African Astronomical Observatory (South Africa)
Janus Brink, South African Large Telescope (South Africa)
South African Astronomical Observatory (South Africa)
Kenneth H. Nordsieck, Univ. of Wisconsin-Madison (United States)
J. Alan Schier, The Pilot Group (United States)


Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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