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Small 15 Deg Calcium Fluoride CaF2 Wedge Prisms,high transmission between 0.15 to 9um AR Coating Range

Categories Infrared Prism
Brand Name: Wuhan Siwer Optics
Place of Origin: Wuhan,China
MOQ: 20 pieces
Price: 40 USD/piece
Payment Terms: T/T, Western Union
Supply Ability: 1000 pieces/month
Delivery Time: 5-7weeks
Packaging Details: 1.Tissue paper. 2.Plastic foam packaging film. 3.Hard carton box with quakeproof filler
Material: Calcium Fluoride
Size tolerance: +/-0.1mm
Chamfer: 0.2-0.5mm
Surface quality: 60/40
Surface flatness: Lambda/4 in 25.4mm
Angle tolerance: 3 arc min
Standard coating: Customized
Size range: 5-150mm
Usage: Infared system
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Small 15 Deg Calcium Fluoride CaF2 Wedge Prisms,high transmission between 0.15 to 9um AR Coating Range

Calcium Fluoride (CaF2) Prims

Calcium Fluoride is superior to UV Fused Silica in deep UV applications. It has a transmission greater than 75% between 0.15-9µm and transmits efficiently up to about 8µm transmitting over 90%. Calcium Fluoride has a hardness of HK158, which is approximately twice as hard as BaF₂. Calcium Fluoride is not readily degraded under normal atmospheric conditions until 600°C when it starts to soften. In dry conditions Calcium Fluoride has a maximum operating temperature of 800°C. Calcium fluoride can be vulnerable to thermal shock at high temperatures. When calcium fluoride powder is compressed in moulds the resulting material is called Irtran-3.




Optical Properties of CaF2 Prisms

MaterialCalcium Fluoride
AR Coating Range0.15-9um
Diameter Tolerance+0.0/-0.1 mm
Thickness Tolerance±0.1 mm
Surface Quality60-40 Scratch-Dig
Surface Flatness
(Plano Side)
λ/2 at 633nm
Surface Irregularity
(Peak to Valley)
λ/4 at 633nm
Angle tolerance3 arcmin (5 seconds according to customer requirements)



Transmittance of CaF2 window(T=2mm)


CaF2 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]

Production Line



Infrared Elements Selection Guide


Product Tags:

optical wedge prism

  

right angle prism

  
Cheap Small 15 Deg Calcium Fluoride CaF2 Wedge Prisms,high transmission between 0.15 to 9um AR Coating Range for sale
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