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LE5838 12.7 mm Dia. CaF2 Positive Meniscus Lens; EFL=20mm Uncoated

LE5838 12.7 mm Dia. CaF2 Positive Meniscus Lens; EFL=20mm Uncoated

Type
Lens
Subtype
Spherical Lens (Convex-Concave)
Brand
Thorlabs
Product webpage
Thorlabs products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
12.7 mm
EFL
20 mm
BFL
16.3 mm
R1
7.5 mm
R2
72.4 mm

Material

Name
CaF2
Dispersion Equation
Sellmeier
n (λ)
1.4096399504333625
λ
4000 nm
B1
0.5675888
C1
0.00252643 μm2
B2
0.4710914
C2
0.010078333 μm2
B3
3.8484723
C3
1200.555973 μm2

LE5838 12.7 mm Dia. CaF2 Positive Meniscus Lens; EFL=20mm Uncoated

The LE5838 is a spherical lens with a convex-concave design, sourced from the reputable vendor Thorlabs. This lens boasts a 12.7 mm diameter and is made from CaF2 (Calcium Fluoride) material, specifically the Mal-1963 variant. The lens's geometry includes a 1.5 mm thickness at the edge, a 4.7 mm thickness at the center, and an effective focal length (EFL) of 20 mm. The radii of curvature are 7.5 mm for the first surface and 72.4 mm for the second surface, resulting in a back focal length (BFL) of 16.3 mm.

The lens's inner and outer radii are both zero, indicating a circular base shape. Notably, this lens does not have any coating, which could affect its performance in certain applications. The lens is designed to operate at a wavelength of 4000 nm. This detailed information allows users to make informed decisions when selecting optical components with similar properties.

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