|
Applications: IR filter, CO2 Laser and infrared imaging systems.
Optical components available: Germanium blanks, rods, discs, lens, windows, prisms and granules are available.
Parameter
|
Germanium |
|
Refractive Index(@10¦Ìm) |
4.0026 |
|
Homogeneity of Refractive Index |
¡Ü1.0¡Á10^-4£¨¦µ250mm£© |
|
Bulk Absorption Coefficient(@10¦Ìm,cm-1) |
¡Ü0.03 |
|
Rupture Modulus(Mpa) |
¡Ý75 |
Technical Index
|
Germanium |
|
Transparent region (¦Ìm) |
1.8¡ª23 |
|
Hardness(kg/mm2 ) |
800 |
|
Density(g/cm3) |
5.33 |
|
Yonug¡¯s Modulus(Gpa) |
103 |
|
ThermalConductivity(Wcm-1k-1) |
59 |
|
Thermal Expansion Coefficient(/¡æ) |
6.1¡Á10-6 |
|
Posson ratio |
0.28 |
|
Melting point(/¡æ) |
937 |
|
Specific heat (Cal/g.k.) |
0.074 |
|
Dielectric constant |
16 |
|
Resistivity (¦¸cm) |
0.01--50 |
[NOTE]the listed index are from reference book, may be different from our products, more special requirements should be discussed individually.
Spec.of process
Cylinder blanks or Polished Windows |
|
Maxium Diameter(mm) |
300£¨mono-crystalline£©
380£¨polycrystalline£© |
|
Thickness |
minimum 0.8mm, maximum: depends on the diameter, |
|
Example |
for ¦µ25mm£¬max length 600mm;
¦µ200mm,max.length 200mm |
|
Spherical lens |
|
Diameter |
from 15 to 200mm |
|
Tolerance on diameter |
0.1mm; |
|
Tolerance on curvatures |
0.5%; |
|
Tolerance on center thickness |
0.1mm | |
