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Ultra Thin Deep UV Infrared Window , 192nm Wavelength CaF2 Calcium Fluoride Window

Categories Infrared Window
Brand Name: Wuhan Siwer Optics
Place of Origin: Wuhan,China
MOQ: 5 pieces
Price: 20-98USD/piece
Payment Terms: T/T, Western Union
Supply Ability: 1000 pieces/month
Delivery Time: 3-5 weeks
Packaging Details: 1.Tissue paper. 2.Plastic foam packaging film. 3.Hard carton box with quakeproof filler
Material: Calcium Fluoride(CaF2)
Size tolerance: +/-0.1mm
Chamfer: 0.2-0.5mm
Surface quality: 60/40
Surface flatness: Lambda/4 in 25.4mm
Parallelism: 0.01mm
Standard coating: uncoated or customized
Size range: 3-120mm
Usage: 192nm Analyzer
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Ultra Thin Deep UV Infrared Window , 192nm Wavelength CaF2 Calcium Fluoride Window

0.4mm thickness ultra thin deep UV 192nm wavelength CaF2 window

High purity single crystal CaF2 material has excellent transmittance in UV, but it still has a large absorption in the wavelength range below 200nm. In order to reduce the absorption of deep UV light by CaF2 window, we need to make the thickness of the window very thin.
CaF2 material is easy to be broken., which greatly increases the processing difficulty of ultra-thin CaF2 window. Siwer optics can produce large size and super thin CaF2 windows, and provide you with high quality customized services.


The thickness of CaF2 window with diameter less than 25.4mm can be 0.2mm





Optical Properties of CaF2 Window

MaterialCalcium Fluoride
Diameter Tolerance+0.0/-0.1 mm
Thickness Tolerance±0.1 mm
Parallelism1 arc min
Surface Quality60-40 Scratch-Dig
Surface Flatness
(Plano Side)
λ/2 at 633nm
Surface Irregularity
(Peak to Valley)
λ/2 at 633nm
Clear Aperture90%


Calcium Fluoride properties

Chemical FormulaCaF2
Crystal ClassCubic, cleaves [111] plane
Lattice Constant, Å5.46
Density, g/cm3 (20 °C)3.18
Molecular Weight78.08
Reflection Loss5.4% at 5 μm
Absorption Coefficient7.8 x 10-4 cm-1 @ 2.7 μm
Dielectric Constant for 105 Hz6.76
Melting Temperature, K1630
Thermal Conductivity, W/(m K) at 273 K10
Thermal Expansion, 1/K at 300 K18.9 x 10-6
Specific Heat, cal/(g K) at 273 K0.204
Debye Temperature, K510
Young's Modulus, GPa75.79
Rupture Modulus, GPa0.0365
Shear Modulus, GPa33.76
Bulk Modulus, GPa83.03
Poisson's Ratio0.28
Knoop Hardness, kg/mm2178 [100], 160 [110]


Infrared Elements Selection Guide


Production process

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