; CaF2_TEMTO - Enable & perfect your technologies!
    


Home > Products > Optical Products > Optical Materials > CaF2
CaF2

Calcium Fluoride (CaF2) single crystal is an optical material with high transmittance in ultraviolet, visible and infrared regions of the spectrum: 0.15 m ~ 9 m range. Calcium Fluoride is widespread used for optical windows, lenses and prisms in the IR application; especially pure grades find useful application in the UV and as UV Eximer (High power applications) laser windows.

Useful: This material has found wide use in high power laser optics due to its low absorption; polished surfaces are stable and will last several years under normal conditions; due to its low refractive index, Calcium Fluoride can be used without anti-reflection coating.


Main Properties

 

Crystal Properties

Crystal Growth Method
Vacuum Stockbarger
Max. Size (mm)
<250
Optical Properties
Transmission range (m)
0.17~7.8
Reflection Loss, % for two surfaces at 5 m
5.4
dN/dT
-10.6x10-6/C
Absorbance
1.7x10-4(3.8m)
Refractive Index
see below
Wavelength (m)
Refractive Index (n)
Wavelength (m)
Refractive Index (n)
0.1495
1.5800
4.0000
1.4069
0.1612
1.5490
5.0000
1.3990
0.2000
1.4951
6.0000
1.3856
0.3000
1.4540
7.0000
1.3693
0.4000
1.4419
8.0000
1.3498
0.5000
1.4365
9.0000
1.3268
1.0000
1.4289
10.0000
1.3002
2.0000
1.4239
11.0000
1.2676
3.0000
1.4179
12.0000
1.2299
Transmission Curve

Crystallographic Properties

Syngony
Cubic
Lattice Constant, Angstrom (Å)
5.462
Cleavability
<111>
Physical Properties
Density, at 291 K
3.18g/cm3
Hardness, Mohs
4
Dielectric Constant for 105 Hz
6.76
Melting point, C
1360
Thermal Conductivity, W/mK at 36C
9.71
Thermal Expansion, 1/K
(16.2~19.4)x10-6
Specific Heat Capacity, J/(KgC) at 40C
887.6
Knoop Hardness, Kg/mm2
178 [100], 160 [110]
Youngs Modulus, Gpa
<100>
<111>
146.1
89.9
Shear Modulus, Gpa
<100>
<111>

47.6
33.8
Bulk Modulus, GPa
82.7
Debye Temperature, K
510
Elastic Coefficients
C11=164, C44=33.7, C12=53
Poisson Ratio
0.26
Chemical Properties
Chemical Formula
CaF2
Molecular Weight
78.08
Solubility in water at 20 C
0.0017g/100g water

Copyright © 2004-2018 TEMTO Technology Co., Ltd, TEMTO®, All rights reserved. ICP05004887
Tel: +86-591-8787-0640  Fax: +86-591-8787-0641  E-mail: sales@temto.com  http://www.temto.com