Frequently Asked Questions

A Plano-Concave Lens is made up of a plane and a concave spherical surface, with 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 H-K9L Plano-Concave Lenses is 40/20 (Diameter≤25.4mm), 60/40 (Diameter >25.4mm).

The coating used for H-K9L Plano-Concave Lenses 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 specified by the customer.

The order information for Plano-Concave Lenses includes 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. Other specifications can be specified by the customer.

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