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Proceedings Paper

Refractive index homogeneity TWE effect on large aperture optical systems
Author(s): M. Stout; B. Neff
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Paper Abstract

Sapphire windows are routinely being used in demanding aerospace applications due to their high strength and desirable optical and material properties. Sapphire is particularly useful in addressing the increasing need for systems that provide a wider range of capabilities in a single package. In general, refractive index homogeneity of the component materials can have a significant impact on overall optical system performance. This leads to the need for a deeper understanding of the shape and magnitude of index inhomogeneity in large sapphire windows to ensure predictable, high quality operation. Thin, sapphire slices from a sapphire crystal boule grown via the Heat Exchanger Method (HEM) have been previously evaluated for refractive index homogeneity over a 25.4cm (10.0”) aperture. The resultant transmitted wavefront error (TWE) from those measurements has now been used to model typical optical systems to quantify the effects on system-level performance attributed to representative amounts of index inhomogeneity in the sapphire window. The results of this modeling effort are presented in the following paper.

Paper Details

Date Published: 3 May 2017
PDF: 7 pages
Proc. SPIE 10179, Window and Dome Technologies and Materials XV, 101790O (3 May 2017); doi: 10.1117/12.2269464
Show Author Affiliations
M. Stout, II-VI Optical Systems (United States)
B. Neff, II-VI Optical Systems (United States)

Published in SPIE Proceedings Vol. 10179:
Window and Dome Technologies and Materials XV
Brian J. Zelinski, Editor(s)

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