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Custom Infrared Window UV And IR Dual Spectrum Flame Detector CaF2 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: Infrared system
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Custom Infrared Window UV And IR Dual Spectrum Flame Detector CaF2 Window

UV and IR Dual Spectrum Flame detector CaF2 protected window

Calcium Fluoride (CaF₂) is commonly used for optics looking at the IR and UV spectrums and has a very low change in refractive index with wavelength.


Our CaF2 window is selected by many flame detector manufacturers, and we keep long-term cooperation. According to the design requirements of each customer, we continuously supply windows of different specifications.




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


Quality Custom Infrared Window UV And IR Dual Spectrum Flame Detector CaF2 Window for sale
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