Silicon and Germanium lens blanks

product summary

Cimcoop has over 25 years of experience in crystal growing and is producing IR lens blanks. We offer round disc shapes, pre-generated lens blanks as well as complex CNC machined profiles. Our CNC grinding equipment provides high-precision, polish ready finishes using tooling down to D7.


  • In-house crystal growth

  • Diameters from 10 to 152 mm

  • Delivery in 2-3 weeks

  • Custom type, orientation and resistivity

  • Silicon & Germanium

manufacturing limits

Diameter range 10 to 152 mm
Diameter tolerance ± 0.02 mm
Center thickness (CT) 2 to 50 mm
CT tolerance ± 0.01 mm
Radius tolerance ± 0.1%
Chamfer 0.1 to 1mm
ETV ≥ 20 μm
Roundness ≥ 20 μm
Surface finish down to D15 or D7