Infrared Germanium window

The transmittance range of the optical germanium material is 2-14 um, and the refractive index is as high as 4. Germanium lens and germanium window are widely used in thermal imaging system.
Germanium window is a common protective window in infrared imaging system. Its material quality, surface smoothness, parallelism, surface quality and coating quality will directly affect the imaging effect.
The resistivity of optical grade single crystal germanium material we choose is usually 5-40 Ohms. If the customer requests, we can also choose germanium material with specified resistivity.
Due to the high refractive index and high surface reflectivity of germanium (r > 30%), optical germanium windows usually need AR coating on its surface.
If the equipment is used in a bad environment, the outer side of the germanium protection window needs to be coated with DLC Coating.DLC Coating has excellent wear resistance, acid resistance and corrosion resistance.

Optical Properties of Germanium Window

Transmittance of Antireflection coatings:

Germanium properties:

Infrared Elements Selection Guide

Production process

Company profile

Wuhan Siwer Optics is a professional manufacturer of various optical components.We focuses on production of optical interference filters,infrared and visible optical components.
The company has optical optimization design, precision optical processing and optical coating technology and production technology, with complete production processing and testing equipment, perfect quality management system.
With continuous technological progress and management innovation, we will create more value and provide better products and services for our customers.

Product Range

Discover the range of standard optical components,including interference filters,optical lenses,prisms,laser windows,dielectric and metallic mirors.We can supply quick interference filters purchase and delivery from our stock,design and manufacture custom optical elements from a wide range of optical materials with vacuum coatings.

Infrared and visible optical prisms,lenses,windows
Material:Germanium,Silicon,ZnSe,ZnS,CaF2,MgF2,Sapphire,Visible optical glass,etc.

Interference filters:bandpass filters,shortpass filters,longpass filters.

Our filters are widely used in: driverless, UAV, optical fiber communication, industrial laser, automation equipment, semiconductor production, micro measurement system, building surveying and mapping, biometrics, medical instruments and devices, security monitoring, beauty instruments, stage lighting, high-energy laser equipment, military equipment, infrared imaging, visual light source, biochemical analyzer, enzyme marker, fingerprint identification, rainbow Membrane recognition, micro projection and imaging systems.

Optical coatings:Infrared Anti-Reflective Coating,Partial Reflective Coating, High Reflective Coating, Polarization Beamsplitter Coating, Dichroic Coating.

Our products are widely used in Precision Instruments,Beauty Equipments,Medical Equipments,Infrared Imaging,Measurement Systems,Laser Processing Equipments,and Scientific area.