China 0.5mm 1.8mm 2.5mm 80mm 100mm Sapphire Quartz Glass Ball Lens Glass Beads, Find details about China Glass Ball Lens, Ball Lens from 0.5mm 1.8mm 2.5mm 80mm 100mm Sapphire Quartz Glass Ball Lens Glass Beads
Range of diameter | Dia.0.7mm-Dia.400mm |
Range of curve radius | R1.5-R∞ etc. |
Tolerance of diameter | +/-0.1, +/-0.01, +/-0.005 etc. |
Surface accuracy | λ , 1/2λ , 1/4λ , 1/10λ etc. |
Tolerance of Thickness | +/-0.1, +/-0.05, +/-0.01 etc. |
Centration | +/-2′,+/-1′ etc. |
Aperture N | 5, 1 etc. |
Irregularity ΔN | 2, 1, 0.5, 0.2 etc. |
Surface quality | 60/40, 40/20, 20/10, 10/5 etc. |