VIS-IR transmitting BGG glass and glass-ceramics

Shyam S. Bayya; Joshua A. Wojcik; Jasbinder Singh Sanghera; Ishwar D. Aggarwal

doi:10.1117/12.405282

25 October 2000 VIS-IR transmitting BGG glass and glass-ceramics

Shyam S. Bayya, Joshua A. Wojcik, Jasbinder Singh Sanghera, Ishwar D. Aggarwal

Proceedings Volume 4102, Inorganic Optical Materials II; (2000) https://doi.org/10.1117/12.405282
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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.

Citation Download Citation

Shyam S. Bayya, Joshua A. Wojcik, Jasbinder Singh Sanghera, and Ishwar D. Aggarwal "VIS-IR transmitting BGG glass and glass-ceramics", Proc. SPIE 4102, Inorganic Optical Materials II, (25 October 2000); https://doi.org/10.1117/12.405282

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