The diameter of He Rui optics' ball lenses is usually small, often in the millimeter range or smaller. Common materials for ball lenses include UV-grade fused silica, sapphire, and BK7 glass. UV-grade fused silica is suitable for UV, visible, and near-infrared applications due to its low coefficient of thermal expansion, while BK7 glass, a borosilicate crown glass with a refractive index of about 1.51, is commonly used for visible light applications. Sapphire, although more expensive, offers better optical transmission properties and is suitable for UV and IR applications.
Material | optical glass,N-BK7 , Fused Silica, sapphire,Si,Ge,CaF2,LiF,BaF2,ZnS,ZnSe,Znse,ZnS |
Dimensions | 3-400mm |
Dimension Tolerance | ±0.01mm |
Thickness Tolerance | ±0.01mm |
Center thickness | >1mm |
Focal Length tol. | ±1% |
Centration | 3 arc minutes |
Surface Quality | 80/50 60/40 40-20 20-10 |
Clear Aperture | >90% |
Coating | AR/AR,as per your request customized available |
Can be customized as per your request.If you have any question,please contact us.