Typical specifications:
– Diameter range 10 to 150 mm
– Tickness tolerance ± 0.05 mm
– Radius 5 mm to infinity
– Surface irregularity PV < 0.125 µm
– Surface cosmetics 5/2×0,1 as ISO 10110
– Centering accuracy up to 30 arc sec
– Achromatic lenses, doublets and triplets
– lenses round and square share
– Black varnishing on lens edges