Achromatic Lens

Achromatic doublet, which is composed of two individual lenses made from glasses with different amounts of dispersion. Typically, one element is a negative (concave) element made out of flint glass  such as F2, which has relatively high dispersion, and the other is a positive (convex) element made of crow glass such as BK7, which has lower dispersion. The lens elements are mounted next to each other, often cemented together, and shaped so that the chromatic aberration of one is counterbalanced by that of the other.

The process capacity for the Cylindrical lens

● Material:N-BK7, H-K9L, Fused Silica, H-ZF52A, Sil, MgF2, CaF2, Sapphire, ZnSe, ZnS, etc.

● Diameter:5-200mm

● Tolerance: +/-0.05mm

● Thickness tolerance: +/-0.05mm

● Surface accuracy: λ/4 @632,8nm

● Centration : < 1 arc min

● Clear aperture : >90%

● S/D :60-40,40-20,20-10 

● Coatings: AR coating,BBAR coating, customized available.