Optik

Germanium (Ge)

Nutzen Sie die einzigartige Kombination aus hohem Brechungsindex hervorragender Härte von Germanium, um langlebige, stromsparende Bildgebungs- und Lasersysteme mit einer minimalen Anzahl an Bauteilen zu entwickeln.

Germanium (Ge) is ideal for applications where ruggedness and durability are important, and Ge optics can withstand optical powers in the range of 50-100 watts. Its high refractive index enables its use as a beamsplitter without additional coating.

Germanium (Ge) Characteristics

Coherent supplies Ge substrates of up to 150 mm diameter, and carefully monitors 10.6 µm absorptivity to ensure that thermal runaway and fracture do not occur.

Ge Material Properties

Physikalische Eigenschaften

Young’s Modulus

100 GPa (12.04 x 106 psi)

Rupture Modulus

93 MPa (20,000 psi)

Knoop Hardness

692 kkg/mm²

Density

5.32 g/cm³

Poisson-Zahl

0.27

Thermal Properties

Thermal Conductivity @ 20° C

0.59 W/cm/°C

Specific Heat

0.31 J/g/°C

Linear Expansion Coefficient @ 20° C

5.7 x 10-6/°C

Optical Properties

Bulk Absorption @ 10.6 μm

<0.03 cm-1

Temperature Change of Refractive Index @ 10.6µm

408 x 10-6/°C