Frequently Asked Questions

A Plano-Concave Lens is made up of a plane and a concave spherical surface. It has a negative focal length, which makes its application range very wide.

The material used for H-K9L Plano-Concave Lenses is H-K9L.

The surface quality of the lens is 40/20 (Diameter≤25.4mm), 60/40 (Diameter >25.4mm).

The coating used for the lens is MGF: Anti-reflection coating: MgF2, Ravg<1.75% per surface@400-700nm, Anti-reflection coating: Ravg<0.5% per surface@370-675nm, Anti-reflection coating: Ravg<0.5% per surface@650-1050nm, Anti-reflection coating: Ravg<0.5% per surface@1050-1620nm, Anti-reflection coating: Ravg<1.25% per surface@400-1000nm, Anti-reflection coating: R<0.25% per surface (532nm, 808nm, 1064nm, etc.), and other coating as per customer specified.

The order information for the lens includes the item dimension (mm), diameter, effective focal length (EFL) (mm), back focal length (BFL) (mm), center thickness (CT) (mm), edge thickness (ET) (mm), radius R1 (mm), and material.

You May Also Like