Calcium Fluoride (CaF2)

Calcium Fluoride (CaF2) Data Sheet

Product and technology advantages
High transparency in the VUV and transparency in the visible and infrared range (multispectral effect)
High uniformity of the refractive index
Low birefringence including large dimension elements
Due to combined crystal growth and annealing the process has high flexibility.

Application
Optical parts of devices operating in the spectral range from 0.125 to 9 microns - infrared imaging devices and vacuum spectroscopy.

Optical characteristics
caf2 trans

Transmission Range :0.13 to 10 m
Refractive Index :1.39908 at 5 m (1) (2)
Reflection Loss :5.4% at 5 m
Absorption Coefficient :7.8 x 10-4 cm-1 @ 2.7 m
Reststrahlen Peak :35 m
dn/dT :-10.6 x 10-6/C (3)
dn/d = 0 :1.7 m
Density :3.18 g/cc
Melting Point :1360C
Thermal Conductivity :9.71 W m-1 K-1 (4)
Thermal Expansion :18.85 x 10-6/C (5)(6)
Hardness :Knoop 158.3 (100) with 500g indenter
Specific Heat Capacity :854 J Kg-1 K-1
Dielectric Constant :6.76 at 1MHz (7)
Youngs Modulus (E) :75.8 GPa (7)
Shear Modulus (G) :33.77 GPa (7)
Bulk Modulus (K) :82.71 GPa (7)
Elastic Coefficients :C11 = 164 C12 = 53 C44 = 33.7 (7)
Apparent Elastic Limit :36.54 MPa
Poisson Ratio :0.26
Solubility :0.0017g/100g water at 20C
Molecular Weight :78.08
Class/Structure :Cubic (111) cleavage
No = Ordinary Ray
mNomNomNo
0.1491.58000.1611.54900.1951.5000
0.2001.49500.2221.48000.2481.4680
0.2661.46210.2801.45840.3001.454
0.3371.44810.4001.44190.4861.4370
0.5881.43390.6561.43250.6871.4320
0.7281.43140.8841.42981.0141.4288
1.1001.42831.2501.42751.6501.4256
1.9001.42442.0581.42362.4501.4214
2.7001.41992.8001.41923.0501.4175
3.4001.41494.0001.40964.4001.4057
4.8001.40145.0001.39915.3041.3952
5.8931.38716.4831.37827.0721.3681
7.6611.3578.2511.34448.8401.3308
9.4291.3161

Grown Crystals Maximum Dimensions
O 395 ? 150 mm

Fabricated Optics Maximum Dimensions
O 70..300 50..150 mm

Delivery options
Blanks, SMTY, Windows, Lenses, Prisms

Delivery Terms
Standart shipment time 3 weeks