Material | BK7,JGS1,etc | |
Diameter Tolerance | φ5-250mm+0/-0.2 | |
Centration | <3 arc minutes | |
Focal Length Tolerance | ±2% | |
Surface Quality | 60/40 | |
Flatness | <3(0.5)@632.8nm | |
Clear Aperture | >90% | |
Plano Convex,Plano concave,Double Convex,Double Concave,Meniscus,Ball,Achromatic,and Custom Lens. |