Tolerance Limits

Surface Tolerances Commercial Precision Max Capability
Surface Quality (scratch-dig) 80 – 50 60 – 40 10 – 5
Surface Roughness (ARMS) 10* 5*
Surface Irregularity (Fringes, P-V @ 633nm) 2 to 4 1/2 to 1 1/5
Surface Power (Fringes, P-V @ 633nm) 10 3 to 5 1
* material and size dependent
Dimensional Tolerances Commercial Precision Max Capability
Diameter (mm) +/- 0.10 +/- 0.05 +/- 0.01*
Center Thickness (mm) +/- 0.15 to 0.20 +/- 0.10 to 0.05 +/- 0.02
Centration (Ray deviation) 5+ min. 2 – 3 min. 10 sec.*
* material and size dependent
Asphere Commercial Precision Max Capability
Form error 2.0 µm 1.0 µm 0.3 µm