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Proceedings Paper

VIS-IR transmitting BGG glass and glass-ceramics
Author(s): Shyam S. Bayya; Joshua A. Wojcik; Jasbinder Singh Sanghera; Ishwar D. Aggarwal
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Paper Abstract

BaO-Ga2O3-GeO2 (BGG) glasses have the desired properties for window applications in the 0.5 - 5 micrometers wavelength region. BGG glasses are low cost alternatives to the currently used window materials and are being scaled-up to large sizes for various Department of Defense applications. Fabrication of a high optical quality 6.5' X 8.5' X 0.5' rectangular BGG glass window has already been demonstrated. A transmitted wave front error of about (lambda) /15 at 632 nm has been achieved in polished BGG glasses. Although the mechanical properties of BGG glasses are acceptable for various window applications, it is demonstrated here that they can be further improved significantly either by the glass-ceramization process or by forming a composite. Neither process adds any significant cost to the final window material. The glass composite transmits in the 0.5 - 5 micrometers region while the crystallite size in the glass-ceramic currently limits its transmission to the 2 - 5 micrometers region.

Paper Details

Date Published: 25 October 2000
PDF: 6 pages
Proc. SPIE 4102, Inorganic Optical Materials II, (25 October 2000); doi: 10.1117/12.405282
Show Author Affiliations
Shyam S. Bayya, Naval Research Lab. (United States)
Joshua A. Wojcik, Naval Research Lab. (United States)
Jasbinder Singh Sanghera, Naval Research Lab. (United States)
Ishwar D. Aggarwal, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 4102:
Inorganic Optical Materials II
Alexander J. Marker; Eugene G. Arthurs, Editor(s)

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