Laser Beam Expanders

Material: ZnSe, Ge
Normal specification:
Diameter tolerance: +0.0/-0.10mm 
Center thickness tolerance:+/-0.1mm
Parallelism:<3 arc min typical 
Surface accuracy: λ/2 @632.8nm 
Surface quality: 40-20 
Coating: Custom design

Note: Dimension and specification are available upon requests.