Germanium (Ge) wedge prisms

The refractive index of single crystal germanium material is higher than 4.0, and the wedge prism made of single crystal germanium has strong deflection ability to infrared light.

The surface reflectivity of germanium prism is about 36%, so we need to make antireflection coatings on the prism surfaces

Germanium material is softer than other optical materials, and there are many surfaces should be polished,so the surface quality of germanium prism is easier to be destroyed in the processing.
Because germanium material does not penetrate the visible light, it can not use the self-collimation method to measure the angular accuracy as other materials'prisms.
These factors lead to high production cost of germanium prism.

In infrared system, it is sometimes necessary to deflect the infrared light (especially the light with 8-14um wavelength) at a certain angle, and germanium prism is very suitable for it.

Since the Refractive index of single crystal germanium is 4.0, its critical angle is only 14.5 degrees, it is very conducive to the propagation of light beam in the prism.

We have customized various germanium prisms for many university laboratories and other similar research departments. We have many years of experience in this field.

We can customize germanium prisms for you.Or you just need to tell us what you need to achieve,Our engineers can recommend or design suitable prisms for you.
More details please contact us.

Production Line

Optical Properties of Germanium Prism

Transmittance of Antireflection coatings:

Germanium properties:

Infrared Elements Selection Guide

What's the way of shipping?
We accept DHL, Fedex, TNT, UPS, SF, EMS etc. If you have your own express account, it's great.

How to pay?

(1) T/T, PayPal, West Union,etc

(2) Bank Fee: West Union-USD30.00(≤USD3000.00),

T/T-USD20.00+, PayPal-5%. Please consult the local bank.

What's the deliver time?
For inventory: the delivery time is around 5 workdays.

Customized products: the delivery time is 10 to 30 workdays. According to the quantity and precision.

Can I customize the products based on my need?
Yes, we can customize the material, specifications and optical coating for your optical components based on your needs. OEM is available.

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.