LF5154-E 12.7 mm Dia. CaF2 Negative Meniscus Lens; EFL=-80mm 2-5µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- -80 mm
- BFL
- -77.9 mm
- R1
- 33.7 mm
- R2
- 16.2 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
LF5154-E 12.7 mm Dia. CaF2 Negative Meniscus Lens; EFL=-80mm 2-5µm
The LF5154-E is a spherical lens with a concave-convex base shape and a circular design, sourced from Thorlabs. This lens boasts a 12.7 mm diameter and a negative meniscus geometry, making it suitable for a wide range of optical applications. The lens has a center thickness of 3 mm and an edge thickness of 3.7 mm, contributing to its robust construction.
The effective focal length (EFL) of this lens is -80 mm, indicating its diverging nature. The first radius of curvature (R1) is 33.7 mm, while the second radius (R2) is 16.2 mm. The back focal length (BFL) is -77.9 mm. Notably, the lens does not have an inner or outer radius.
The LF5154-E is crafted from CaF2 (Calcium Fluoride) material, identified as "caf2 mal-1963" in the material ID. This material is known for its excellent transparency in the ultraviolet, visible, and near-infrared spectral regions, making the lens suitable for wavelengths up to 4000 nm.
The lens is coated with "tho ecaf2arc20005000" on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall efficiency of the optical system.
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