LE5838 12.7 mm Dia. CaF2 Positive Meniscus Lens; EFL=20mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
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.
