|
RONAR-SMITH®
LASER OPTICS & IR IMAGING
|
 |
Infrared Optical Material - Ge |
Infrared Optical Material -
Ge |
CaF2| GaAs |MgF2| ZnSe | ZnS
| Sapphire
| Si
| |
|
|
Basic Properties: |
Gemanium (Ge) |
Chalcogenide
glass containing germanium(GG-1)
|
Chalcogenide
glass containing germanium(GG-2) |
Chalcogenide
glass containing germanium(GG-3) |
|
Transmission
band(¦Ìm) |
1.8-23 |
1-16 |
0.9-16 |
0.9-16 |
|
Uniformity index |
4.89¡Á10-5
(¦Õ250mm) |
1.1¡Á10-4
(¦Õ100mm) |
1.1¡Á10-4
(¦Õ100mm) |
1.1¡Á10-4
(¦Õ100mm) |
Refractive index(10µm)
|
4.0032 |
2.6002 |
2.4976 |
2.4347 |
|
Temperature coefficient of the refractive index(10-6/¡æ) |
408 |
80 |
72 |
|
|
Absorption(10µm.cm-1) |
0.03 |
< 0.02 |
< 0.07 |
< 0.07 |
|
Hardness(kg/cm2) |
800 |
150 |
170 |
236
virkers |
|
Density(g/cm3) |
5.323 |
4.67 |
4.40 |
4.36 |
|
Rupture Modulus
(Mpa) |
75 |
18.2 |
18.2 |
|
|
Yang's modulus(Gpa) |
103 |
21.8 |
22.1 |
18.6 |
|
Poisson's ratio |
0.28 |
0.26 |
0.26 |
0.26 |
|
Melting point(¡æ) |
937 |
|
|
|
|
Thermal
conductivity(Wcm-1k-1) |
0.7 |
0.72 |
0.6 |
|
|
Thermal expansion coefficient(X10-6¡æC-1) |
6.1 |
16 |
13 |
13.7 |
|
Specific
Heat(Cal/g.k.) |
0.074 |
0.066 |
0.07 |
|
|
Permittivity |
16 |
|
|
¡¡ |
|
Conductive models |
N |
|
|
|
|
Resistivity(¦¸cm) |
5-40 |
|
|
|
|
Maximum diameter(mm) |
300 |
150 |
150 |
150 |
|
|
Wavelength
(µm)
|
Index
|
|
Wavelength
(µm)
|
Index
|
|
Wavelength
(µm)
|
Index
|
|
Wavelength
(µm)
|
Index
|
|
2.2
|
4.0879
|
|
5.0
|
4.0160
|
|
7.8
|
4.0061
|
|
10.6
|
4.0028
|
|
2.4
|
4.0732
|
|
5.2
|
4.0149
|
|
8.0
|
4.0057
|
|
10.8
|
4.0026
|
|
2.6
|
4.0599
|
|
5.4
|
4.0139
|
|
8.2
|
4.0053
|
|
11.0
|
4.0025
|
|
2.8
|
4.0523
|
|
5.6
|
4.0128
|
|
8.4
|
4.0049
|
|
11.2
|
4.0024
|
|
3.0
|
4.0451
|
|
5.8
|
4.0118
|
|
8.6
|
4.0044
|
|
11.4
|
4.0023
|
|
3.2
|
4.0399
|
|
6.0
|
4.0107
|
|
8.8
|
4.0042
|
|
11.6
|
4.0023
|
|
3.4
|
4.0311
|
|
6.2
|
4.0097
|
|
9.0
|
4.0040
|
|
11.8
|
4.0022
|
|
3.6
|
4.0289
|
|
6.4
|
4.0092
|
|
9.2
|
4.0038
|
|
12.0
|
4.0021
|
|
3.8
|
4.0267
|
|
6.6
|
4.0087
|
|
9.4
|
4.0036
|
|
12.2
|
4.0020
|
|
4.0
|
4.0245
|
|
6.8
|
4.0083
|
|
9.6
|
4.0034
|
|
12.4
|
4.0020
|
|
4.2
|
4.0223
|
|
7.0
|
4.0079
|
|
9.8
|
4.0033
|
|
12.6
|
4.0019
|
|
4.4
|
4.0205
|
|
7.2
|
4.0074
|
|
10.0
|
4.0031
|
|
12.8
|
4.0019
|
|
4.6
|
4.0189
|
|
7.4
|
4.0070
|
|
10.2
|
4.0030
|
|
13.0
|
4.0018
|
|
4.8
|
4.0172
|
|
7.6
|
4.0066
|
|
10.4
|
4.0029
|
|
|
|
|
|
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