Specifications:

Material: Optical Grade CaF2 Single Crystal
Design Wavelength: 1.5mm
Design Index: n=1.425
Surface Quality: 80-50 scratch and dig
Paraxial Focal Length: ±2%
Diameter Tolerance: +0.0, -0.15mm
Centration: 3 arc minutes
Clear Aperture: >80%
Surface Figure: l[email protected]
Bevel: 0.25 mm x 45°