LF5847-E 12.7 mm Dia. CaF2 Negative Meniscus Lens; EFL=-50mm 2-5µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 12.7 mm
- EFL
- -50 mm
- BFL
- -47.9 mm
- R1
- 20.4 mm
- R2
- 9.8 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
LF5847-E 12.7 mm Dia. CaF2 Negative Meniscus Lens; EFL=-50mm 2-5µm
The LF5847-E is a spherical lens with a concave-convex base shape and a circular design, sourced from the reputable vendor Thorlabs. This lens boasts a 12.7 mm diameter and a negative meniscus shape, making it an ideal choice for specific applications.
The lens's geometry includes a 4.3 mm thickness at the edge, reducing to 3 mm at the center, and an effective focal length (EFL) of -50 mm. The first radius of curvature (R1) is 20.4 mm, while the second radius (R2) measures 9.8 mm. The back focal length (BFL) is -47.9 mm, and both the inner and outer radii are 0 mm.
The LF5847-E is crafted from CaF2 (Calcium Fluoride) material, identified as "caf2 mal-1963" in the material ID. This material is well-suited for wavelengths of 4000 nm. The lens is coated with tho ecaf2arc20005000 on both the front and back surfaces, enhancing its performance and durability.
Please note that the weblink for this item, "https://www.thorlabs.com/thorproduct.cfm?partnumber=LF5847-E", is valid and indicates that the item is in stock, providing users with the assurance of immediate availability.