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OTHERS
   
CaF2
Calcium Fluoride can be used in the ultraviolet through infrared due to its high transmission from 250nm to 7um. It is typical used in cryogenics cooled thermal imaging systems. This material has also found use in high power and excimer laser optics due to its low absorption and high damage threshold. CaF2 can be used without an AR coating because of its low refractiev index.
Safetyrich optical selected high quality material to satisfy with customer different request.
 
Wevelength (µm)
n
0.55
1.435
1.0
1.429
2.0
1.424
3.0
1.418
4.0
1.410
5.0
1.399
 
Optical property
Crystal Class Cubic,cleaves[111]plane
Density at 20°C ,g/cm3 3.18

Thermal Conductivity  W/(mk)at 273K

 10
Thermal Expansion 1K at 300K 18.9X10-6
Lattice Constant,Å 5.46
Molecular Weight 78.08
Dielectric Constant for 2X105Hz 6.76
Melting Point,K 1630
Specific Heat,cal/(gK)at 273K
 0.204
Knoop Hardness,kg/mm2 178[100],160[110]
Young's Modulus,GPa 75.79
Shear Modulus,Gpa 33.76
Bluk Modulus,GPa 83.03
Poisson's Ratio 0.28
Debye Temperature, K 510
Rupture Modulus,GPa 0.0365
CaF2 Plano Convex lens
Material
Calcium Fluoride
General
Precise
Dimension Tolerance
+/-0.1mm
+/-0.05mm
Claer Aperture
80%
90%
Deviation
3min
1min
Surface Faltness
1/4L@ 633nm
1/8L@633nm
Surface Quality
40-20
10-5

CaF2 Half Ball Lens

Material
Calcium Fluoride
General
Precise
Dimension Tolerance
+/-0.1mm
+/-0.05mm
Claer Aperture
80%
90%
Deviation
3min
1min
Surface Faltness
1/4L@ 633nm
1/8L@633nm
Surface Quality
40-20
10-5
CaF2 Brewster Prism
Material
Calcium Fluoride
General
Precise
Dimension Tolerance
+/-0.1mm
+/-0.05mm
Claer Aperture
80%
90%
Parallelism
3min
1min
Surface Faltness
1/4L@ 633nm
1/8L@633nm
Surface Quality
40-20
10-5
CaF2 Rectangular Prism
Material
Calcium Fluoride
General
Precise
Dimension Tolerance
+/-0.1mm
+/-0.05mm
Claer Aperture
80%
90%
Surface Faltness
1/4L@ 633nm
1/8L@633nm
Surface Quality
40-20
10-5
CaF2 Bi-convex Lens  
Material
Calcium Fluoride
General
Precise
Dimension Tolerance
+/-0.1mm
+/-0.05mm
Claer Aperture
80%
90%
Surface Faltness
1/4L@ 633nm
1/8L@633nm
Surface Quality
40-20
10-5
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