LF5394-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-1000mm 2-5µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -1000 mm
- BFL
- -997.4 mm
- R1
- 438.1 mm
- R2
- 211.1 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
LF5394-E 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-1000mm 2-5µm
The LF5394-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 4.2 mm. It is designed for use with a wavelength of 4000 nm and features an effective focal length (EFL) of -1000 mm, making it suitable for a variety of applications.
The lens's geometry includes a first radius (r1) of 438.1 mm and a second radius (r2) of 211.1 mm, resulting in a back focal length (BFL) of -997.4 mm. The lens is made from Calcium Fluoride (CaF2) material, identified as "caf2 mal-1963" in the material database.
The LF5394-E is equipped with anti-reflection coatings on both the front and back surfaces. These coatings, identified as "tho ecaf2arc20005000", are designed to reduce surface reflections and increase transmission in the spectral range of 2000-5000 nm.
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