Specification | ||
Material | Optical Quartz | |
Diameter tolerance | +/-0.1 mm | |
Thickness tolerance | +/-0.1 mm | |
Clear Aperture | >90% | |
Parallelism | 3 arc minutes | |
Surface Quality | 60/40 scratch and dig | |
Surface irregularity | λ/4 (at) 632.6nm | |
Protective Bevel | 0.25x45° | |
Payment | T/T, Western Union, Credit Card, Paypal ,etc |