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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 of the H-K9L Plano-Concave Lenses is H-K9L.

The surface quality of the H-K9L Plano-Concave Lenses is 40/20 (Diameter≤25.4mm), 60/40 (Diameter ＞25.4mm).

The H-K9L Plano-Concave Lenses have different anti-reflection coatings depending on the wavelength range: Ravg<0.5% per surface@370 -675nm, B: Ravg<0.5% per surface@650 -1050nm, C: Ravg<0.5% per surface@1050 -1620nm, AB: Ravg<1.25% per surface@400 -1000nm, V: R<0.25% per surface (532nm, 808nm, 1064nm etc.).

The order information for the PCV01-005 Plano-Concave Lens is: Dimension(mm) - 25, Diameter - 50, Effective Focal Length - 52.3mm, Back focal length - 3.5mm, Center Thickness - 6.3mm, Edge Thickness - 25.84mm, Radius R1 - N/A, Material - H-K9L.

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