Germanium Lenses / Germanium Mirrors

Material: VGF, C2 monocrystalline Germanium

VGF grown
n-type doping: Sb,As or P
Resitivity: 2 - 30 ohmcm
EPD:
- less then 2000/cm2, typically 1500/cm2 for 1-4inch diameter
- less then 5000/cm2, typically 3000/cm2 for 150mm diameter

Germanium Lenses

Forms: convex, concave, menisk
Diameter: 6-150mm
Focal Distance: 2mm to infinity
Tolerance of focal distance: +/-1%
Free aperture: 90%
Thickness tolerance: +/- 0,1mm
Form accuracy: lambda/4 at 633 nm
Surface quality: down to MIL 10-5 scr/dig
Bevels: on request
Coating: on request, metallic and dielectric coatings possible

Germanium Cylindrical Lenses

Forms: plane convex, plane concave
Focal Distance: 40 <ETH> 10000 mm / -40 - -10000mm
Tolerance of Focal distance. +/-4%
Length, width 10 <ETH> 100 mm
All other values as above

Germanium Spherical Mirrors

Diameter: 4 <ETH> 150mm
Focal Distance: 4mm to infinity
Coating: metallic
All other values as above

We are able to produce on request spherical optical components to tighter specifications.