LF5515-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-100mm 2-5µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -100 mm
- BFL
- -97.2 mm
- R1
- 42 mm
- R2
- 20.2 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
LF5515-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-100mm 2-5µm
The LF5515-E is a spherical lens with a concave-convex base shape and a circular design, sourced from Thorlabs. This lens boasts a diameter of 25.4 mm and a center thickness of 4 mm, with an edge thickness of 6.5 mm. The effective focal length (EFL) is -100 mm, and the back focal length (BFL) is -97.2 mm. The radii of curvature for the first and second surfaces are 42 mm and 20.2 mm, respectively.
This lens is crafted from Calcium Fluoride (CaF2) with the Mal-1963 material ID. It is designed to operate at a wavelength of 4000 nm. The lens features a broadband anti-reflection coating, denoted as tho ecaf2arc20005000, on both the front and back surfaces, enhancing its performance in the 2000-5000 nm range.
Please note that the inner and outer radii are both 0, indicating that this lens does not have any special shaping on its edges. This lens is currently in stock and available for immediate purchase through the provided weblink.
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