UV FUSED SILICA ? SPECTROSIL0 pages
DATA SHEET
UV FUSED SILICA
– SPECTROSIL
Spectrosil® synthetic fused silica is manufactured using a patented, environmentally friendly
process resulting in a glass of exceptional purity and excellent visual quality. It is a very
homogeneous synthetic fused silica glass for deep UV optical applications.
Spectrosil® 2000 is chlorine-free, free of bubbles and inclusions and due to its ultra-high purity,
has exceptional optical transmission in the deep ultraviolet and visible, with a useful range from
below 180 nm through to 2000 nm.
Optical Properties
ad000Transmission – Typical Internal Transmission (10 mm path length)
Refractive Index Homogeneity¹ ≤ 10 ppm achievable (must be specified if needed)
Striae Class 5 in Functional Direction
ISO 10110-4
Birefringence / Residual Strain1) ≤ 5 nm/cm
(Typical values)
Bubbles
Bubble class (DIN 58927) 0
Maximum number of inclusions² 0
Fluorescence³ Free
(254 nm excitations)
1) Stress induced birefringence and optical homogeneity are valid for 80 % of the diameter of an ingot or for 90 % diameter of a machined
component.
2) Bubbles and Inclusions with ø ≤ 80 μm are not counted. Inclusions free down to 10 μm upon request.
3) Excitation by Hg-Lamp @ λ = 254 nm and UQ 5-filter; Lamp-power: 8W; Detection: adapted eye
Transmission – Typical Internal Transmission (10 mm path length)
λ = 193.4 nm
λ = 248 nm
Spectrosil® 2000 > 98.5 %
> 99.5 %
Typical Transmission Spectrum
Sample thickness 10mm