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Proceedings Paper

Design of the KOSMOS oil-coupled spectrograph camera lenses
Author(s): Thomas P. O'Brien; Mark Derwent; Paul Martini; Gary Poczulp
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Paper Abstract

We present the design details of oil-coupled lens groups used in the KOSMOS spectrograph camera. The oil-coupled groups use silicone rubber O-rings in a unique way to accurately center lens elements with high radial and axial stiffness while also allowing easy assembly. The O-rings robustly seal the oil within the lens gaps to prevent oil migration. The design of an expansion diaphragm to compensate for differential expansion due to temperature changes is described. The issues of lens assembly, lens gap shimming, oil filling and draining, bubble mitigation, material compatibility, mechanical inspection, and optical testing are discussed.

Paper Details

Date Published: 28 July 2014
PDF: 14 pages
Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915141 (28 July 2014); doi: 10.1117/12.2053594
Show Author Affiliations
Thomas P. O'Brien, The Ohio State Univ. (United States)
Mark Derwent, The Ohio State Univ. (United States)
Paul Martini, The Ohio State Univ. (United States)
Gary Poczulp, National Optical Astronomy Observatory (United States)

Published in SPIE Proceedings Vol. 9151:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
Ramón Navarro; Colin R. Cunningham; Allison A. Barto, Editor(s)

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