Alkor Technologies - manufacturer of Fused Silica optical components.
We supply the following Fused Silica optics:
- Fused Silica windows up to 250mm diameter;
- Fused Silica lenses with any desired focal length;
- Fused Silica prisms and wedges.
- Fused Silica mirrors with protected Al or Gold coatings.
Please send us your specifications, we will quote it for you within 24 hours.
Fused Silica is available in UV and IR grades for different applications:
KU-1 - UV Fused Silica has high transparency within ultraviolet and visible regions. It has no absorption bands within 170-250 nm wavelength interval. It has an intensive OH-absorption band at 2600-2800nm wavelength range. This grade does not express fluorescence as a result of UV excitation, and is characterized by optical-radiation stability. It is practically free from bubbles and inclusions.
The nearest analogues of quartz glass KU-1 are:
Suprasil Standard (Heraeus), Spectrosil A and B (Saint-Gobain), Corning 7980 (Corning), JGS1, Dynasil 1100 and 4100 (Dynasil).
KU-1 Fused Silica Windows are in UV grade material and usable down to 170nm.
Maximum dimensions: Dia 300x100mm. Contact us for further information.
KU-1 Fused Silica Transmission (10 mm thickness, reflective losses included)
KI - IR Fused Silica features high transparency within visible and infrared regions. It has no OH-absorption bands within 2600-2800 nm wavelength interval. Extremely low bubble and inclusion content (0.3 defects/100cm3 of defects larger than 200 microns), low-OH (<50ppm OH), low cost.
Infrared fused silica windows with low "OH" content can be used for applications requiring IR transmission to about 2900-3500nm. IR Fused Silica windows and mirrors by Alkor works in European gas analyzers and gas detectors.
Maximum dimensions: Dia400x250mm. Contact us for furhter information.
KI IR Fused Silica Transmission (10 mm thickness, reflective losses included)
For large quantity Heraeus Quartz glass can be requested (Suprasil 3001, Suprasil 3002, Spectrosil, Infrasil and more).
Fused Silica is used for windows, lenses and prisms in the transmission range 0.16-3.5mkm. Fused Silica refractive index varies from 1.55 to 1.40 through the transmission range. It is resistant to scratching and thermal shock.
Fused Silica is suitable for applications in the UV, VIS, IR band and is often used as a viewport window. We provide a large variety of Fused Silica windows for vacuum viewports suitable for ISO-K, KF and СА flanges. AR and Reflective Coatings are available for Fused Silica optics.
|Transmission Range :
||0.18 to 2.2 μm (3 μm for IR grades)
|Refractive Index :
||1.47012 at 4 μm (1)
|Reflection Loss :
||7.0% at 0.4 μm (2 surfaces)
|Absorption Coefficient :
||10 x 10-6 cm-1 at 1 μm
|Reststrahlen Peak :
||+11.9 x 10-6 /°C
|dn/dμ = 0 :
|Melting Point :
||1600 °C (softening)
|Thermal Conductivity :
||1.38 W m-1 K-1
|Thermal Expansion :
||0.55 x 10-6 /°C at 300K
||Knoop 500 with 200g indenter
|Specific Heat Capacity :
||703 J Kg-1 K-1
|Dielectric Constant :
||3.78 at 25GHz
|Youngs Modulus (E) :
|Shear Modulus (G) :
|Bulk Modulus (K) :
|Elastic Coefficients :
|Apparent Elastic Limit :
||55 MPa (7980 psi)
|Poisson Ratio :
||Insoluble in Water
|Molecular Weight :
||UV or IR Fused silica
||≤ 3 Arc mins
||30 Arc seconds
See also: Sapphire optics