China Manufacture Custom Made Optical Bk7 Glass Convex Concave Lens, Find details about China Bk7 Convex Concave Lens, Bk7 Glass Convex Lens from Manufacture Custom Made Optical Bk7 Glass Convex Concave Lens
Diameter range | 1.5mm to 700mm |
Tolerance | +/-0.02mm |
Thickness tolerance | +/-0.03mm |
Focal length tolerance | 1% |
Surface quality | 40-20 or better |
Surface irregularity | Lambda/4 or better |
Chamfer | Protective chamfer |
Coating | anti-reflective coating for visible, UV and infrared wavelength or No AR coating |
Substrate | N-BK7,Fused silica, JGS1, corning 7980, N-BAK4, N-SF11,silicon, sapphire, etc. |