Home Companies Wuhan Siwer Optics Co.,Ltd

Durable Material Infrared Optical Lens Germanium Infrared Spheric Lenses

Wuhan Siwer Optics Co.,Ltd
Active Member

Contact Us

[China] country

Address: Building 7, No. 116, Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province

Contact name:Jason

Inquir Now

Wuhan Siwer Optics Co.,Ltd

Durable Material Infrared Optical Lens Germanium Infrared Spheric Lenses

Country/Region china
City & Province wuhan hubei
Categories Eyeglasses Lenses
InquireNow

Product Details

Infrared Germanium Lens

     Wavelength Range of 2 - 16μm

    Rugged, Durable Material

    Ideal for Defense, Security, and Thermal Imaging Applications

    Additional Infrared Lenses Available in Popular Substrates

 

We will choose high quality single crystal Germanium material to make lens. The resistivity of germanium material is usually 5-40 ohms. We can also choose Germanium material with specified resistivity according to customer's requirements.
The production technology of germanium lens usually includes low-speed polishing, high-speed polishing and single point diamond turning techniques.
a) Low-speed polishing, also known as classical polishing, can produce germanium lenses with higher accuracy, but the production efficiency is very low and the cost is relatively high.
b) High-speed polishing can make germanium lens quickly. It is the best choice in mass production. It has lower production cost.
c) Single point diamond turning techniques can make germanium lens with arbitrary curved surface, and single point car can also be selected for small batch germanium lens samples.

According to the customer's use scenario, we will recommend suitable germanium lens for customers and choose the best solution.

 

     


Optical Specifications of Germanium Lens

MaterialSingle Crystal Germanium
AR Coating Range3-5um,8-12um,3-11um
Reflectance over
AR Coating Range @ 0° AOI

Ravg < 2%,3-5um or 8-12um

Ravg<5%,3-11um

Transmission over
AR Coating Range @ 0° AOI
Tavg > 94%,3-5um or 8-12um
Diameter Tolerance+0.0/-0.1 mm
Thickness Tolerance±0.1 mm
Focal Length Tolerance±2%
Surface Quality60-40 Scratch-Dig
Surface Flatness
(Plano Side)
λ/2 at 633nm
Spherical Surface Powerc
(Convex Side)
1.5λ at 633nm
Surface Irregularity
(Peak to Valley)
λ/2 at 633nm
Centration<3 arcmin
Clear Aperture>Ø10.16 mm (Ø1/2" Lenses)
>Ø20.32 mm (Ø1" Lenses)
Design Wavelength10.6 μm

 


Transmittance of Antireflection coatings:


Germanium properties:

Chemical FormulaGe
Crystal FormPoly or Single Crystal
Crystal ClassCubic
Resistivity, Ohm*cm0.01-40
Lattice Constant, Å5.66
Molecular Weight72.6
Density, g/cm3 at 300 K5.33
Dielectric Constant for 9.37 x 109 Hz at 300 K16.6
Melting Temperature, K1210
Thermal Conductivity, W/(m K) at 293 K59
Thermal Expansion, 1/K at 298 K6.1 x 10-6
Specific Heat, cal/(g K) at 273-373 K0.074
Debye Temperature, K370
Bandgap, eV0.67
Solubility in waterNone
Knoop Hardness, kg/mm2800
Mohs Hardness6.3
Young's Modulus, GPa102.66
Shear Modulus, GPa67.04
Bulk Modulus, GPa77.86
Poisson's Ratio0.278

 


Infrared Elements Selection Guide

 

Hot Products

UV,visible and IR CaF2 windows Low solubility and wide transmission range makes it useful for many ...
Infrared Detector CaF2 widnows Calcium Fluoride (CaF₂) is commonly used for optics looking at the IR ...
Calcium Fluoride Crystal High performance Caf2 optica viewport windows Calcium fluoride shows good ...
High quality optical IR Calcium Fluoride CaF2 windows for Infrared application CaF2 is commonly used ...
Single Crystal CaF2 Window Calcium Fluoride is used for optical windows, drilled discs, lenses and ...
Ruby ball lens The ruby ball is made of artificial Blue / RUBY monocrystal, which has the characteri...