Specifications of Half-ball Lenses:
- Material: BK7, Sapphire, Ruby, Fused Silica, Silicon, LaSFN9, optical glass, etc.
- Size Range: diameter from 2mm to 10mm, thickness from 1mm to 5mm.
- Surface Quality: 80/50, 60/40, 40/20
- Diameter tolerance: +/-0.0025, +/-0.005mm
- Thickness tolerance: +/-0.025mm,+/0.05mm
- Ellipticity: 0.0025mm of balls
- Coating: none, customized avaliable