UV Grade Fused Silica is synthetic amorphous silicon the dioxide of extremely high purity, excellent transmission throughout the UV, visible, and NIR spectral ranges. Fused Silica glass combines a very low thermal expansion coefficient and good optical qualities.
UV Fused silica is an excellent choice in comparison with the N-BK7 when we need higher transmission in the deep UV range to the NIR or a lower factor of thermal expansion.