Positive Meniscus Lenses

Positive Meniscus Lenses

Positive meniscus spherical glass lens is a convex-concave lens used to minimize spherical aberration while while maintaining the angular resolution of the optical assembly. Its center thickness is bigger than the edge thickness. Normally  they are used to achieve tighter beam focusing when cemented with another positive lens.

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 Positive Meniscus Lenses (Uncoated)
Item numberDiameter(mm)Focal length(mm)Radius of curvature1(mm)Radius of curvature2(mm)Centre thickness(mm)Edge thickness(mm)
PML1125.415049.1131.63.12.0
PML1225.430066.2182.22.82.0
PML1350.810030.365.89.71.1
PML1450.815047.9119.37.32.7
PML1550.825082.5224.75.52.9
CaF2 Positive Meniscus Lenses(with 3 - 5 µm AR Coating)
Item numberDiameter(mm)Focal length(mm)Radius of curvature1(mm)Radius of curvature2(mm)Centre thickness(mm)Edge thickness(mm)
PMLC2112.720.07.572.44.71.4
PMLC2212.780.020.049.13.02.4
PMLC2325.44015146.98.92.4
PMLC2425.45015.555.27.12.0
PMLC2525.41503578.64.02.7