Germanium (Ge) is widely used in far infrared wavelength,it is transparent from 2000nm to 17000nm.Germanium also has higher refractive index about 4 at 10.6 micron.Germanium is very popular in FLIR and imaging applications.Ge windows and lenses can be manufactured by MT-Optics,Inc.
Item No :
Germanium MaterialProduct Origin :
FuZhouProperties:
Transmission range: | 2000 nm~17000 nm |
Dimensional Tolerance: | 5.5x10-6/K |
Density: | 5.33g/cm3 |
Specifications:
Diameter Tolerance: | +0.0, -0.1mm |
Thickness tolerance | ±0.2mm |
Clear aperture: | >80% (Small Size); >90% (Large Size) |
Parallelism: | <1 arc min |
Surface quality: | 40/20 |
Flatness: | λ/4@633nm |
Coating: | Coating upon Request |
Why choose Germanium (Ge)?
Germanium (Ge) is chosen for optical components due to its high infrared transmission (70%-80%) in mid-IR (2-16 μm) to long-wave IR bands, high refractive index (n≈4.0@10 μm) for simplified optical design, moderate hardness, and chemical stability. It suits lenses and windows for infrared imaging and CO₂ laser systems, excelling in thermal imaging and laser applications.