Germanium is ideal for making windows and lenses for infrared applications in lasers and optical systems. Ge components are used with AR coatings due to the high surface reflectivity of the substrate. The high index of refraction ensures excellent single-wavelength performance, resulting in the best "best-form" singlet composed of germanium. We provide Ge windows to our customers.
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Catalog Number
ACMA00028185
Product Name
Ge Windows with AR Coating, ø25.4mm
Melting Point
937 ℃
Diameter
ø 25.4 mm
Thickness
3.0 mm
DimensionTolerance
diameter±0.1mm/thickness±0.2mm
Coating
AR/AR@10.6 µm
Flatness
<1.5 λ per inch @ 633 nm
Parallelism
<3 arcmin
Surface Quality
60-40 scratch & dig
ClearAperture
80% of diameter
Crystal Structure
cubic
Lattice Parameters
a = 5.657 Å
Density
5.33 g/cm3
Absorption Coefficient
@ 10.6 µm, n = 4.0034
Transmission
1.8-17 µm
Material
Ge
MSDS
COA
Spec Sheet
1. Covers a wide infrared transmission range of 1.8-16 µm; 2. Opaque in the visible range.
Germanium (Ge) based optics are widely used in IR applications.