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HIGH PURITY FUSED SILICA WITH LOW ABSOLUTE REFRACTIVE INDEX
HIGH PURITY FUSED SILICA WITH LOW ABSOLUTE REFRACTIVE INDEX
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机译:低绝对折射率的高纯度熔融石英
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摘要
A fused silica glass article having a low absolute refractive index and low concentrations of hydroxyl groups, halogens, and metal having a low absolute refractive index. The glass article contains less than about 10 ppm protium-containing and deuterium-containing hydroxyl groups by weight and less than about 20 ppm halogens by weight. The silica glass article also has an absolute refractive index (ARI) less than or equal to 1.560820. In one embodiment, the ARI of the fused silica article is achieved by lowering the fictive temperature of the fused silica. A method of lowering the fictive temperature is also described.
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