Sorry, this product is no longer offered for sale. It was discontinued on Feb 20, 2025
Optical Window, Germanium, 25.0 mm Diameter, 3.0 mm Thick, 3-12 µm
The GEW13AR.20 is a 3 μm to 12 μm antireflection coated, 25.0 mm in diameter and 3.0 mm thick Germanium window. Germanium has high index of refraction, making it a perfect choice for applications that require low dispersion. The AR coating provides high transmission from 2 μm to 16 μm while reducing the high surface reflectivity of the substrate. With its broad transmission range and opacity in the visible spectrum, Germanium is a popular choice for MWIR (Mid-Wave Infrared) laser applications.
Specifications
- Diameter25.0 mm
- MaterialOptical Grade Germanium
- Antireflection Coating3-12 µm
- Surface Flatnessλ/20 @ 10.6 µm
- Surface Quality40-20 scratch-dig
- Thickness3.0 mm
- Thickness Tolerance± 0.1 mm
- Parallelism< 1 arc minute
- Cleaning
- Clear ApertureCentral 90% of diameter
- Diameter Tolerance+0.0/-0.1 mm
- Coating CodeAR.20
Resources & Downloads
3D Product Models
Other
GEW13AR.20 RoHS Certificate(704.8 kB, PDF) AR Coated Germanium Transmission Data.xlsx(69.2 kB, XLSX)
2D Product Drawings
GEW model drawing.pdf(100.4 kB, PDF)
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