Fused silica is the amorphous form of quartz crystal. Advantages of fused silica material include the extremely good transparency from UV to IR, low coefficient of thermal expansion, large resistance to thermal shock over large temperature excursions, wide thermal operating range and high laser damage threshold.
Our fused silica windows/rods are fabricated from high quality UV grade fused silica glass (UVFS). An extremely large range of thickness/length from 0.15 mm to 150 mm is achievable. Various high quality HR, AR, and partial reflective coatings are available upon request.
|Part No.||Aperture||Thickness||Coating||Price||Availability||Add to Cart|
Basic Properties of Fused Silica Glass:
|Transparency Range: 185 - 2300 nm||
|Density: 2.2 g/cm3|
dn/dT= 1.0 x 10-5 /oC
|Optical Homogeneity: Δn < 10-6 /cm|
|Mohs Hardness: 7|
|Thermal Conductivity: 1.4 W/m/K|
|Thermal Expansion Coefficient:||α = 0.54 x 10-6/K|
Sellmeier Equations: (λ in μm) :
|Wavelength (nm)||Index of refraction|
Specifications of fused Silica Windows:
|Dimension Tolerance:||Diameter: ± 0.1 mm,
Thickness: ± 0.1 mm (T=<5mm), +0.5/-0.1 mm (T>5mm)
|Clear Aperture:||> 85%|
|Surface Quality:||20/10 Scratch and Dig|
|Parallelism:||< 1 arc min|
|Flatness:||λ/8 @ 632.8 nm for T>=2mm|
|Transmission Wavefront Distortion:||< λ/8 @ 632.8 nm for T=<25mm
< λ/8 @ 632.8 nm per 25mm for T>25mm
|Bevel:||< 0.25 mm X 45°|
High quality HR, AR, Broadband AR (BBAR) and partial reflective (PR) coatings are also available upon request.
AR Coatings: R<0.25% at the central wavelength
HR Coatings: R>99.6% at the central wavelength
PR Coatings: R=3-95% at the specified wavelength
Broadband AR coating: R<1% over the specified range
Coating curves: AR@810 nm, AR@405 nm
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