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Proceedings Paper

Synthesis of broadband anti-reflection coatings for spaceflight infrared optics
Author(s): Colin Cole; John W. Bowen
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Paper Abstract

A synthesis method is outlined for the design of broadband antireflection coatings for use in spaceborne infrared optics. The Golden Section optimization routine is used to make a search, using designated non-absorptive dielectric thin film combinations, for the coating design which fulfills the required spectral requirements using the least number of layers and different materials. Three examples are given of coatings designed by this method: (i) 1 micrometers to 12 micrometers antireflection coating on Zinc Sulphide using Zinc Sulphide and Yttrium Fluoride thin film materials. (ii) 2 micrometers to 14 micrometers antireflection coating on Germanium using Germanium and Yttrium Fluoride thin film materials. (iii) 6 micrometers to 17 micrometers antireflection coating on Germanium using Lead Telluride, Zinc Selenide and Barium Fluoride. The measured spectral performance of the manufactured 6 micrometers to 17 micrometers coating on Germanium is given. This is the antireflection coating for the Germanium optics in the NASA Cassini Orbiter CIRS instrument.

Paper Details

Date Published: 30 September 1994
PDF: 10 pages
Proc. SPIE 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics, (30 September 1994); doi: 10.1117/12.188109
Show Author Affiliations
Colin Cole, Univ. of Reading (United Kingdom)
John W. Bowen, Univ. of Reading (United Kingdom)


Published in SPIE Proceedings Vol. 2210:
Space Optics 1994: Space Instrumentation and Spacecraft Optics
Thierry M. Dewandre; Joachim J. Schulte-in-den-Baeumen; Emmanuel Sein, Editor(s)

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