Complaint
| Specification | commercialCommercial | High Precision |
| Material | As Required Schott,CDGM.etc. | As required Schott, CDGM,etc. |
| Diameter Tolerance | +0.00/-0.20mm | +0.00/-0.05mm |
| Focual Length Tolerance | Typical +/-5%@633nm | Typical +/-2% @633nm |
| Centration | Typical <3arcmin | Typical <3arcmin |
| Surface [email protected] | L/4 | L/8 |
| Surface Quality | 80-50 | 40-20 |
| Bevel | 0.2-0.5 | 0.05-0.2 |
| Coating | As required, with paint, Protection coating, high precision | |
