LE5990-E 25.4 mm Dia. CaF2 Positive Meniscus Lens; EFL=500mm 2-5µm
- 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-E 25.4 mm Dia. CaF2 Positive Meniscus Lens; EFL=500mm 2-5µm
The LE5990-E is a Spherical Lens (Convex-Concave) with a base shape of Circular, designed and manufactured by Thorlabs. This lens boasts a diameter of 25.4 mm and a thickness at the edge of 3.6 mm, while the center thickness is 4 mm. The Effective Focal Length (EFL) is 500mm, specifically designed for use with a wavelength of 4000 nm.
The lens is made of CaF2 (Calcium Fluoride) material, identified as "caf2 mal-1963" in the Material ID. The front and back of the lens are coated with "tho ecaf2arc20005000", a coating type that enhances the lens's performance.
The inner and outer radii of the lens are 0, and the Back Focal Length (BFL) is 495.4 mm. The lens's shape is spherical, and it is available from Thorlabs with a valid "in stock" status.
For more detailed information, please refer to the vendor's website at https://www.thorlabs.com/thorproduct.cfm?partnumber=LE5990-E.