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Proceedings Paper

Electrochemically deposited nickel alloys with controlled thermal expansion for optical applications
Author(s): Douglas L. Hibbard
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Paper Abstract

Electrochemically grown nickel-based alloys (electroless nickel) are currently used as a polishable coating on lightweight metal and nonmetal substrates for high performance applications ranging from large spaceborne telescopes to cryogenically cooled optical instruments. The performance of nickel plated optics is currently limited by bi-metallic dimensional stability issues. OCA has determined that careful selection of processing parameters and plating bath chemistries leads to a family of coatings whose thermal expansion curves can be tailored to better match those of ultra-lightweight substrate materials of interest over useful temperature ranges. This paper presents a discussion on the nature of the thermal expansion mismatch and a description of the fundamental methodology used in developing stable EN-substrate couples.

Paper Details

Date Published: 6 September 1995
PDF: 8 pages
Proc. SPIE 2542, Optomechanical and Precision Instrument Design, (6 September 1995); doi: 10.1117/12.218671
Show Author Affiliations
Douglas L. Hibbard, OCA Applied Optics (United States)

Published in SPIE Proceedings Vol. 2542:
Optomechanical and Precision Instrument Design
Alson E. Hatheway, Editor(s)

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