Negative Meniscus Lenses

Negative Meniscus Lenses

Negative meniscus spherical glass lens is a convex-concave lens used to minimize spherical aberration and beam expanding applications. Its center thickness is smaller than the edge thickness.When used in combination with another lens, it will increase the focal length and decrease the NA of the system.

Glass material: N-BK7,Fused Silica,CaF2,ZnSe and etc

Effective Focal Length Tolerance: ± 1%

Surface Quality:60/40,40/20 (scratch&dig)

Diameter Tolerance: +0.0, -0.2mm/+0.00/-0.10 mm

Thickness Tolerance:±0.1 mm

Clear Aperture: ≥ 90% of Diameter

Centering Tolerance : ≤3 arc min

Coating :Uncoated / AR Coating

N-BK7 Negative Meniscus Lenses (Uncoated)
Item numberDiameter(mm)Focal length(mm)Radius of curvature1(mm)Radius of curvature2(mm)Centre thickness(mm)Edge thickness(mm)
NML2125.4-15010043.13.04.1
NML2225.4-300250.095.13.03.5
NML2325.4-400250.0112.53.03.4
NML2425.4-500250.0126.33.03.3
NML2525.41000500253.23.03.2
N-BK7 Negative Meniscus Lenses(with 350-700nm AR Coating)
Item numberDiameter(mm)Focal length(mm)Radius of curvature1(mm)Radius of curvature2(mm)Centre thickness(mm)Edge thickness(mm)
NMLC3125.4-100100.033.73.04.7
NMLC3225.4-150100.043.13.04.1
NMLC3325.4-200100.050.23.03.8
NMLC3425.4-300250.095.13.03.5
NMLC3525.4-400250.0112.53.03.4