► Diameter: From f1.5mm to f5.0mm
► Radius: R=1.0mm, R=1.5mm, R=2.0mm
Specifications
Dimension tolerance
±0.1mm
Focal tolerance
±2%
Centration
3 arcmin
Surface quality
60-40 S/D
Surface flatness
l/2@632.8nm
Clear aperture
>90%
Bevel
Protective bevel
Chinese 
