LF7601-F 25.4 mm Dia. ZnSe Negative Meniscus Lens; EFL=-50mm 8-12µm
- Type
- Lens
- Subtype
- Spherical Lens (Concave-Convex)
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25.4 mm
- EFL
- -50 mm
- BFL
- -44.9 mm
- R1
- 23 mm
- R2
- 15.6 mm
Material
- Name
- ZnSe
- Dispersion Equation
- Sellmeier
- n (λ)
- 2.402780893783937
- λ
- 10600 nm
- B1
- 4.45813734
- C1
- 0.040344681 μm2
- B2
- 0.467216334
- C2
- 0.15317139 μm2
- B3
- 2.8956629
- C3
- 2221.822369 μm2
LF7601-F 25.4 mm Dia. ZnSe Negative Meniscus Lens; EFL=-50mm 8-12µm
The LF7601-F is a spherical lens with a concave-convex base shape and a circular geometry. This lens, sourced from Thorlabs, has a diameter of 25.4 mm and a thickness of 6.7 mm at the edge, narrowing down to 4 mm at the center. The effective focal length (EFL) of this lens is -50 mm, making it a negative meniscus lens. The front and back radii of the lens are 23 mm and 15.6 mm, respectively, resulting in a back focal length (BFL) of -44.9 mm.
This lens is made of ZnSe (Zinc Selenide) material, identified by the Material ID "znse connolly". It is designed to operate at a wavelength of 10600 nm. The lens comes with anti-reflective coatings on both the front and back surfaces, specifically the THORLABS ZnSe-ARCED 8-12 coating, which is optimized for the 8-12 µm spectral range.
Please note that the inner and outer radii of the lens are not specified in the provided data. However, the lens's other specifications provide a clear picture of its properties and potential applications.
