Share Email Print
cover

Proceedings Paper

Ultraviolet compatibility tests of lens coupling fluids used in astronomical instrumentation
Author(s): Kenneth Nordsieck; Frenk Nosan; J. Alan Schier
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We report on extensive laboratory testing of the optical compatibility of immersion fluids often used in astronomical instrumentation. A strong near-ultraviolet absorption feature is seen after incubating several fluids with polyurethane often used in expansion bladders, and a lesser absorption in the farther UV with Viton O-Ring material. Substitute materials were tested, many of which show no such absorption. This program was started in response to a strong UV feature which developed over time in the Robert Stobie Spectrograph of the Southern African Large Telescope. A repair strategy was successfully implemented.

Paper Details

Date Published: 20 July 2010
PDF: 7 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773582 (20 July 2010); doi: 10.1117/12.858281
Show Author Affiliations
Kenneth Nordsieck, Univ. of Wisconsin-Madison (United States)
Frenk Nosan, The Pilot Group (United States)
J. Alan Schier, The Pilot Group (United States)


Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

© SPIE. Terms of Use
Back to Top