Frequently Asked Questions

SQ Fused Silica is available in five quality grades, which are adjusted to individual customer needs in proven measuring and selection procedures. The quality grades range from SQ0, which is recommended for requirements in optical elements with several light directions such as prisms and lenses, to SQT, which is recommended for technical applications.

SQ Fused Silica is suitable for a range of applications, including excimer laser optics and beam guiding systems, DUV and UV optics components, standard optics (VIS and NIR), UV rods, preforms and optical fibers, laser fusion, fused silica vessels and windows, and lithography and microlithography applications.

SQ Fused Silica has excellent optical and physical properties, including laser durability, refractive index homogeneity, thermal stability and temperature shock resistance, low stress birefringence, and small thermal expansion coefficients.

SQ Fused Silica is used for the production of optical and photonic devices in the fiber optic, semiconductor and display technology markets, as well as for optical applications and laser applications.

The excimer grade of SQ Fused Silica is available as SQ1 or SQ0 and has excellent transmission at 193 nm / 248 nm, as well as the lowest level of laser-induced fluorescence (LIF).

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