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Proceedings Paper

Gel-Silica Optics
Author(s): L. L. Hench; S. H. Wang; J. L. Nogues
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Paper Abstract

The processing and properties of Types I and II fused quartz optics and Types III and IV synthetic fused silica optics are compared with new organometallic sol-gel derived (Types V and VI) gel-silica optics. Type V gel-silica has excellent transmission from 165 nm to 4200 nm with no OH absorption peaks. Other physical properties and structural characteristics of Type V gel-silica are similar to high grade fused silica but offer the advantages of near net shape cast4ng, including internal cavities, and a lower coefficient of thermal expansion of 0.2 x 10-6 cm/cm compared with 0.55 x 10-6 cm/cm. Optically transparent porous gel silica (Type VI) has a UV cut-off ranging from 250-300 nm. Type VI gel-silica optics has a density as low as 60% of Types I-V silica and can be impregnated with up to 30 to 40% by volume of a second phase optically active organic or inorganic compound.

Paper Details

Date Published: 3 May 1988
PDF: 10 pages
Proc. SPIE 0878, Multifunctional Materials, (3 May 1988); doi: 10.1117/12.943959
Show Author Affiliations
L. L. Hench, University of Florida (United States)
S. H. Wang, University of Florida (United States)
J. L. Nogues, GELTECH, Inc. (United States)

Published in SPIE Proceedings Vol. 0878:
Multifunctional Materials
Robert L. Gunshor, Editor(s)

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