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Frequently Asked Questions

Infrasil® 301 and 302 are optical quartz glass grades manufactured by fusion of natural quartz crystals in an electrically heated furnace.

Suprasil® 3001, 3002 and 300 are high purity synthetic fused silica materials manufactured by flame hydrolysis.

A chlorine content of 1000 ppm – 3000 ppm is material inherent and results in a slight shift of the UV-absorption edge to the longer wavelength region.

The Suprasil® 300x family of materials has the combination of ultra low total metal impurities (< 1 ppm) and low OH (< 1 ppm) that result in no absorption bands from the visible to the IR spectral region. This property makes this material family the ideal choice for any low absorption application in the near-IR.

An intermediate drying step reduces the OH content of the Suprasil® 300x to below 1 ppm.

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