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Optical Infrared Prism , 90 Degree Right Angle CaF2 Calcium Fluoride Prim

Categories Infrared Prism
Brand Name: Wuhan Siwer Optics
Place of Origin: Wuhan,China
MOQ: 20 pieces
Price: 50 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: 10 arc sed
Standard coating: Customized
Size range: 5-150mm
Usage: Infared system
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Optical Infrared Prism , 90 Degree Right Angle CaF2 Calcium Fluoride Prim

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:

right angle prism

  

ir prism

  
Quality Optical Infrared Prism , 90 Degree Right Angle CaF2 Calcium Fluoride Prim for sale
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