LE5990 25.4 mm Dia. CaF2 Positive Meniscus Lens; EFL=500mm Uncoated
- Type
- Lens
- Subtype
- Spherical Lens (Convex-Concave)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- 500 mm
- BFL
- 495.4 mm
- R1
- 125 mm
- R2
- 317.8 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
LE5990 25.4 mm Dia. CaF2 Positive Meniscus Lens; EFL=500mm Uncoated
The LE5990 is a spherical lens with a convex-concave design, sourced from the renowned optical components manufacturer, Thorlabs. This lens boasts a 25.4 mm diameter and is crafted from Calcium Fluoride (CaF2) material, specifically the Mal-1963 variant.
The lens features a positive meniscus shape, characterized by its base shape being circular. The geometry of the lens includes a thickness of 3.6 mm at the edge and 4 mm at the center, with an effective focal length (EFL) of 500 mm. The first radius of curvature (R1) is 125 mm, while the second radius (R2) is 317.8 mm, resulting in a back focal length (BFL) of 495.4 mm.
Notably, the lens does not have any coating, as indicated in the item data. It is designed to operate at a wavelength of 4000 nm. The lens's material ID is 'caf2 mal-1963', and it is currently in stock, as per the vendor's website.
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